v2.6.4 (2024-03-12)

GitHub release

What's Changed

Fixes

Fix usage of AliasGenerator with computed_field decorator by @sydney-runkle in #8806
Fix nested discriminated union schema gen, pt 2 by @sydney-runkle in #8932
Fix bug with no_strict_optional=True caused by API deferral by @dmontagu in #8826

v2.6.3 (2024-02-27)

GitHub release

What's Changed

Packaging

Update pydantic-settings version in the docs by @hramezani in #8906

Fixes

Fix discriminated union schema gen bug by @sydney-runkle in #8904

v2.6.2 (2024-02-23)

GitHub release

What's Changed

Packaging

Upgrade to pydantic-core 2.16.3 by @sydney-runkle in #8879

Fixes

'YYYY-MM-DD' date string coerced to datetime shouldn't infer timezone by @sydney-runkle in pydantic/pydantic-core#1193

v2.6.1 (2024-02-05)

GitHub release

What's Changed

Packaging

Upgrade to pydantic-core 2.16.2 by @sydney-runkle in #8717

Fixes

Fix bug with mypy plugin and no_strict_optional = True by @dmontagu in #8666
Fix ByteSize error type change by @sydney-runkle in #8681
Fix inheriting Field annotations in dataclasses by @sydney-runkle in #8679
Fix regression in core schema generation for indirect definition references by @dmontagu in #8702
Fix unsupported types bug with PlainValidator by @sydney-runkle in #8710
Reverting problematic fix from 2.6 release, fixing schema building bug by @sydney-runkle in #8718
Fix warning for tuple of wrong size in Union by @davidhewitt in pydantic/pydantic-core#1174
Fix computed_field JSON serializer exclude_none behavior by @sydney-runkle in pydantic/pydantic-core#1187

v2.6.0 (2024-01-23)

GitHub release

The code released in v2.6.0 is practically identical to that of v2.6.0b1.

What's Changed

Packaging

Check for email-validator version >= 2.0 by @commonism in #6033
Upgrade `ruff`` target version to Python 3.8 by @Elkiwa in #8341
Update to pydantic-extra-types==2.4.1 by @yezz123 in #8478
Update to pyright==1.1.345 by @Viicos in #8453
Update pydantic-core from 2.14.6 to 2.16.1, significant changes from these updates are described below, full changelog here

New Features

Add NatsDsn by @ekeew in #6874
Add ConfigDict.ser_json_inf_nan by @davidhewitt in #8159
Add types.OnErrorOmit by @adriangb in #8222
Support AliasGenerator usage by @sydney-runkle in #8282
Add Pydantic People Page to docs by @sydney-runkle in #8345
Support yyyy-MM-DD datetime parsing by @sydney-runkle in #8404
Added bits conversions to the ByteSize class #8415 by @luca-matei in #8507
Enable json schema creation with type ByteSize by @geospackle in #8537
Add eval_type_backport to handle union operator and builtin generic subscripting in older Pythons by @alexmojaki in #8209
Add support for dataclass fields init by @dmontagu in #8552
Implement pickling for ValidationError by @davidhewitt in pydantic/pydantic-core#1119
Add unified tuple validator that can handle "variadic" tuples via PEP-646 by @dmontagu in pydantic/pydantic-core#865

Changes

Drop Python3.7 support by @hramezani in #7188
Drop Python 3.7, and PyPy 3.7 and 3.8 by @davidhewitt in pydantic/pydantic-core#1129
Use positional-only self in BaseModel constructor, so no field name can ever conflict with it by @ariebovenberg in #8072
Make @validate_call return a function instead of a custom descriptor - fixes binding issue with inheritance and adds self/cls argument to validation errors by @alexmojaki in #8268
Exclude BaseModel docstring from JSON schema description by @sydney-runkle in #8352
Introducing classproperty decorator for model_computed_fields by @Jocelyn-Gas in #8437
Explicitly raise an error if field names clashes with types by @Viicos in #8243
Use stricter serializer for unions of simple types by @alexdrydew pydantic/pydantic-core#1132

Performance

Add Codspeed profiling Actions workflow by @lambertsbennett in #8054
Improve int extraction by @samuelcolvin in pydantic/pydantic-core#1155
Improve performance of recursion guard by @samuelcolvin in pydantic/pydantic-core#1156
dataclass serialization speedups by @samuelcolvin in pydantic/pydantic-core#1162
Avoid HashMap creation when looking up small JSON objects in LazyIndexMaps by @samuelcolvin in pydantic/jiter#55
use hashbrown to speedup python string caching by @davidhewitt in pydantic/jiter#51
Replace Peak with more efficient Peek by @davidhewitt in pydantic/jiter#48

Fixes

Move getattr warning in deprecated BaseConfig by @tlambert03 in #7183
Only hash model_fields, not whole __dict__ by @alexmojaki in #7786
Fix mishandling of unions while freezing types in the mypy plugin by @dmontagu in #7411
Fix mypy error on untyped ClassVar by @vincent-hachin-wmx in #8138
Only compare pydantic fields in BaseModel.__eq__ instead of whole __dict__ by @QuentinSoubeyranAqemia in #7825
Update strict docstring in model_validate method. by @LukeTonin in #8223
Fix overload position of computed_field by @Viicos in #8227
Fix custom type type casting used in multiple attributes by @ianhfc in #8066
Fix issue not allowing validate_call decorator to be dynamically assigned to a class method by @jusexton in #8249
Fix issue unittest.mock deprecation warnings by @ibleedicare in #8262
Added tests for the case JsonValue contains subclassed primitive values by @jusexton in #8286
Fix mypy error on free before validator (classmethod) by @sydney-runkle in #8285
Fix to_snake conversion by @jevins09 in #8316
Fix type annotation of ModelMetaclass.__prepare__ by @slanzmich in #8305
Disallow config specification when initializing a TypeAdapter when the annotated type has config already by @sydney-runkle in #8365
Fix a naming issue with JSON schema for generics parametrized by recursive type aliases by @dmontagu in #8389
Fix type annotation in pydantic people script by @shenxiangzhuang in #8402
Add support for field alias in dataclass signature by @NeevCohen in #8387
Fix bug with schema generation with Field(...) in a forward ref by @dmontagu in #8494
Fix ordering of keys in __dict__ with model_construct call by @sydney-runkle in #8500
Fix module path_type creation when globals does not contain __name__ by @hramezani in #8470
Fix for namespace issue with dataclasses with from __future__ import annotations by @sydney-runkle in #8513
Fix: make function validator types positional-only by @pmmmwh in #8479
Fix usage of @deprecated by @Viicos in #8294
Add more support for private attributes in model_construct call by @sydney-runkle in #8525
Use a stack for the types namespace by @dmontagu in #8378
Fix schema-building bug with TypeAliasType for types with refs by @dmontagu in #8526
Support pydantic.Field(repr=False) in dataclasses by @tigeryy2 in #8511
Override dataclass_transform behavior for RootModel by @Viicos in #8163
Refactor signature generation for simplicity by @sydney-runkle in #8572
Fix ordering bug of PlainValidator annotation by @Anvil in #8567
Fix exclude_none for json serialization of computed_fields by @sydney-runkle in pydantic/pydantic-core#1098
Support yyyy-MM-DD string for datetimes by @sydney-runkle in pydantic/pydantic-core#1124
Tweak ordering of definitions in generated schemas by @StrawHatDrag0n in #8583

New Contributors

`pydantic`

@ekeew made their first contribution in #6874
@lambertsbennett made their first contribution in #8054
@vincent-hachin-wmx made their first contribution in #8138
@QuentinSoubeyranAqemia made their first contribution in #7825
@ariebovenberg made their first contribution in #8072
@LukeTonin made their first contribution in #8223
@denisart made their first contribution in #8231
@ianhfc made their first contribution in #8066
@eonu made their first contribution in #8255
@amandahla made their first contribution in #8263
@ibleedicare made their first contribution in #8262
@jevins09 made their first contribution in #8316
@cuu508 made their first contribution in #8322
@slanzmich made their first contribution in #8305
@jensenbox made their first contribution in #8331
@szepeviktor made their first contribution in #8356
@Elkiwa made their first contribution in #8341
@parhamfh made their first contribution in #8395
@shenxiangzhuang made their first contribution in #8402
@NeevCohen made their first contribution in #8387
@zby made their first contribution in #8497
@patelnets made their first contribution in #8491
@edwardwli made their first contribution in #8503
@luca-matei made their first contribution in #8507
@Jocelyn-Gas made their first contribution in #8437
@bL34cHig0 made their first contribution in #8501
@tigeryy2 made their first contribution in #8511
@geospackle made their first contribution in #8537
@Anvil made their first contribution in #8567
@hungtsetse made their first contribution in #8546
@StrawHatDrag0n made their first contribution in #8583

`pydantic-core`

@mariuswinger made their first contribution in pydantic/pydantic-core#1087
@adamchainz made their first contribution in pydantic/pydantic-core#1090
@akx made their first contribution in pydantic/pydantic-core#1123

v2.6.0b1 (2024-01-19)

Pre-release, see the GitHub release for details.

v2.5.3 (2023-12-22)

GitHub release

What's Changed

Packaging

uprev pydantic-core to 2.14.6

Fixes

Fix memory leak with recursive definitions creating reference cycles by @davidhewitt in pydantic/pydantic-core#1125

v2.5.2 (2023-11-22)

GitHub release

What's Changed

Packaging

uprev pydantic-core to 2.14.5

New Features

Add ConfigDict.ser_json_inf_nan by @davidhewitt in #8159

Fixes

Fix validation of Literal from JSON keys when used as dict key by @sydney-runkle in pydantic/pydantic-core#1075
Fix bug re custom_init on members of Union by @sydney-runkle in pydantic/pydantic-core#1076
Fix JsonValue bool serialization by @sydney-runkle in #8190
Fix handling of unhashable inputs with Literal in Unions by @sydney-runkle in pydantic/pydantic-core#1089

v2.5.1 (2023-11-15)

GitHub release

What's Changed

Packaging

uprev pydantic-core to 2.14.3 by @samuelcolvin in #8120

Fixes

Fix package description limit by @dmontagu in #8097
Fix ValidateCallWrapper error when creating a model which has a @validate_call wrapped field annotation by @sydney-runkle in #8110

v2.5.0 (2023-11-13)

GitHub release

The code released in v2.5.0 is functionally identical to that of v2.5.0b1.

What's Changed

Packaging

Update pydantic-core from 2.10.1 to 2.14.1, significant changes from these updates are described below, full changelog here
Update to pyright==1.1.335 by @Viicos in #8075

New Features

Allow plugins to catch non ValidationError errors by @adriangb in #7806
Support __doc__ argument in create_model() by @chris-spann in #7863
Expose regex_engine flag - meaning you can use with the Rust or Python regex libraries in constraints by @utkini in #7768
Save return type generated from type annotation in ComputedFieldInfo by @alexmojaki in #7889
Adopting ruff formatter by @Luca-Blight in #7930
Added validation_error_cause to config by @zakstucke in #7626
Make path of the item to validate available in plugin by @hramezani in #7861
Add CallableDiscriminator and Tag by @dmontagu in #7983
- CallableDiscriminator renamed to Discriminator by @dmontagu in #8047
Make union case tags affect union error messages by @dmontagu in #8001
Add examples and json_schema_extra to @computed_field by @alexmojaki in #8013
Add JsonValue type by @dmontagu in #7998
Allow str as argument to Discriminator by @dmontagu in #8047
Add SchemaSerializer.__reduce__ method to enable pickle serialization by @edoakes in pydantic/pydantic-core#1006

Changes

Significant Change: replace ultra_strict with new smart union implementation, the way unions are validated has changed significantly to improve performance and correctness, we have worked hard to absolutely minimise the number of cases where behaviour has changed, see the PR for details - by @davidhewitt in pydantic/pydantic-core#867
Add support for instance method reassignment when extra='allow' by @sydney-runkle in #7683
Support JSON schema generation for Enum types with no cases by @sydney-runkle in #7927
Warn if a class inherits from Generic before BaseModel by @alexmojaki in #7891

Performance

New custom JSON parser, jiter by @samuelcolvin in pydantic/pydantic-core#974
PGO build for MacOS M1 by @samuelcolvin in pydantic/pydantic-core#1063
Use __getattr__ for all package imports, improve import time by @samuelcolvin in #7947

Fixes

Fix mypy issue with subclasses of RootModel by @sydney-runkle in #7677
Properly rebuild the FieldInfo when a forward ref gets evaluated by @dmontagu in #7698
Fix failure to load SecretStr from JSON (regression in v2.4) by @sydney-runkle in #7729
Fix defer_build behavior with TypeAdapter by @sydney-runkle in #7736
Improve compatibility with legacy mypy versions by @dmontagu in #7742
Fix: update TypeVar handling when default is not set by @pmmmwh in #7719
Support specification of strict on Enum type fields by @sydney-runkle in #7761
Wrap weakref.ref instead of subclassing to fix cloudpickle serialization by @edoakes in #7780
Keep values of private attributes set within model_post_init in subclasses by @alexmojaki in #7775
Add more specific type for non-callable json_schema_extra by @alexmojaki in #7803
Raise an error when deleting frozen (model) fields by @alexmojaki in #7800
Fix schema sorting bug with default values by @sydney-runkle in #7817
Use generated alias for aliases that are not specified otherwise by @alexmojaki in #7802
Support strict specification for UUID types by @sydney-runkle in #7865
JSON schema: fix extra parameter handling by @me-and in #7810
Fix: support pydantic.Field(kw_only=True) with inherited dataclasses by @PrettyWood in #7827
Support validate_call decorator for methods in classes with __slots__ by @sydney-runkle in #7883
Fix pydantic dataclass problem with dataclasses.field default by @hramezani in #7898
Fix schema generation for generics with union type bounds by @sydney-runkle in #7899
Fix version for importlib_metadata on python 3.7 by @sydney-runkle in #7904
Support | operator (Union) in PydanticRecursiveRef by @alexmojaki in #7892
Fix display_as_type for TypeAliasType in python 3.12 by @dmontagu in #7929
Add support for NotRequired generics in TypedDict by @sydney-runkle in #7932
Make generic TypeAliasType specifications produce different schema definitions by @alexdrydew in #7893
Added fix for signature of inherited dataclass by @howsunjow in #7925
Make the model name generation more robust in JSON schema by @joakimnordling in #7881
Fix plurals in validation error messages (in tests) by @Iipin in #7972
PrivateAttr is passed from Annotated default position by @tabassco in #8004
Don't decode bytes (which may not be UTF8) when displaying SecretBytes by @alexmojaki in #8012
Use classmethod instead of classmethod[Any, Any, Any] by @Mr-Pepe in #7979
Clearer error on invalid Plugin by @samuelcolvin in #8023
Correct pydantic dataclasses import by @samuelcolvin in #8027
Fix misbehavior for models referencing redefined type aliases by @dmontagu in #8050
Fix Optional field with validate_default only performing one field validation by @sydney-runkle in pydantic/pydantic-core#1002
Fix definition-ref bug with Dict keys by @sydney-runkle in pydantic/pydantic-core#1014
Fix bug allowing validation of bool types with coerce_numbers_to_str=True by @sydney-runkle in pydantic/pydantic-core#1017
Don't accept NaN in float and decimal constraints by @davidhewitt in pydantic/pydantic-core#1037
Add lax_str and lax_int support for enum values not inherited from str/int by @michaelhly in pydantic/pydantic-core#1015
Support subclasses in lists in Union of List types by @sydney-runkle in pydantic/pydantic-core#1039
Allow validation against max_digits and decimals to pass if normalized or non-normalized input is valid by @sydney-runkle in pydantic/pydantic-core#1049
Fix: proper pluralization in ValidationError messages by @Iipin in pydantic/pydantic-core#1050
Disallow the string '-' as datetime input by @davidhewitt in pydantic/speedate#52 & pydantic/pydantic-core#1060
Fix: NaN and Inf float serialization by @davidhewitt in pydantic/pydantic-core#1062
Restore manylinux-compatible PGO builds by @davidhewitt in pydantic/pydantic-core#1068

New Contributors

`pydantic`

@schneebuzz made their first contribution in #7699
@edoakes made their first contribution in #7780
@alexmojaki made their first contribution in #7775
@NickG123 made their first contribution in #7751
@gowthamgts made their first contribution in #7830
@jamesbraza made their first contribution in #7848
@laundmo made their first contribution in #7850
@rahmatnazali made their first contribution in #7870
@waterfountain1996 made their first contribution in #7878
@chris-spann made their first contribution in #7863
@me-and made their first contribution in #7810
@utkini made their first contribution in #7768
@bn-l made their first contribution in #7744
@alexdrydew made their first contribution in #7893
@Luca-Blight made their first contribution in #7930
@howsunjow made their first contribution in #7925
@joakimnordling made their first contribution in #7881
@icfly2 made their first contribution in #7976
@Yummy-Yums made their first contribution in #8003
@Iipin made their first contribution in #7972
@tabassco made their first contribution in #8004
@Mr-Pepe made their first contribution in #7979
@0x00cl made their first contribution in #8010
@barraponto made their first contribution in #8032

`pydantic-core`

@sisp made their first contribution in pydantic/pydantic-core#995
@michaelhly made their first contribution in pydantic/pydantic-core#1015

v2.5.0b1 (2023-11-09)

Pre-release, see the GitHub release for details.

v2.4.2 (2023-09-27)

GitHub release

What's Changed

Fixes

Fix bug with JSON schema for sequence of discriminated union by @dmontagu in #7647
Fix schema references in discriminated unions by @adriangb in #7646
Fix json schema generation for recursive models by @adriangb in #7653
Fix models_json_schema for generic models by @adriangb in #7654
Fix xfailed test for generic model signatures by @adriangb in #7658

New Contributors

@austinorr made their first contribution in #7657
@peterHoburg made their first contribution in #7670

v2.4.1 (2023-09-26)

GitHub release

What's Changed

Packaging

Update pydantic-core to 2.10.1 by @davidhewitt in #7633

Fixes

Serialize unsubstituted type vars as Any by @adriangb in #7606
Remove schema building caches by @adriangb in #7624
Fix an issue where JSON schema extras weren't JSON encoded by @dmontagu in #7625

v2.4.0 (2023-09-22)

GitHub release

What's Changed

Packaging

Update pydantic-core to 2.10.0 by @samuelcolvin in #7542

New Features

Add Base64Url types by @dmontagu in #7286
Implement optional number to str coercion by @lig in #7508
Allow access to field_name and data in all validators if there is data and a field name by @samuelcolvin in #7542
Add BaseModel.model_validate_strings and TypeAdapter.validate_strings by @hramezani in #7552
Add Pydantic plugins experimental implementation by @lig @samuelcolvin and @Kludex in #6820

Changes

Do not override model_post_init in subclass with private attrs by @Viicos in #7302
Make fields with defaults not required in the serialization schema by default by @dmontagu in #7275
Mark Extra as deprecated by @disrupted in #7299
Make EncodedStr a dataclass by @Kludex in #7396
Move annotated_handlers to be public by @samuelcolvin in #7569

Performance

Simplify flattening and inlining of CoreSchema by @adriangb in #7523
Remove unused copies in CoreSchema walking by @adriangb in #7528
Add caches for collecting definitions and invalid schemas from a CoreSchema by @adriangb in #7527
Eagerly resolve discriminated unions and cache cases where we can't by @adriangb in #7529
Replace dict.get and dict.setdefault with more verbose versions in CoreSchema building hot paths by @adriangb in #7536
Cache invalid CoreSchema discovery by @adriangb in #7535
Allow disabling CoreSchema validation for faster startup times by @adriangb in #7565

Fixes

Fix config detection for TypedDict from grandparent classes by @dmontagu in #7272
Fix hash function generation for frozen models with unusual MRO by @dmontagu in #7274
Make strict config overridable in field for Path by @hramezani in #7281
Use ser_json_<timedelta|bytes> on default in GenerateJsonSchema by @Kludex in #7269
Adding a check that alias is validated as an identifier for Python by @andree0 in #7319
Raise an error when computed field overrides field by @sydney-runkle in #7346
Fix applying SkipValidation to referenced schemas by @adriangb in #7381
Enforce behavior of private attributes having double leading underscore by @lig in #7265
Standardize __get_pydantic_core_schema__ signature by @hramezani in #7415
Fix generic dataclass fields mutation bug (when using TypeAdapter) by @sydney-runkle in #7435
Fix TypeError on model_validator in wrap mode by @pmmmwh in #7496
Improve enum error message by @hramezani in #7506
Make repr work for instances that failed initialization when handling ValidationErrors by @dmontagu in #7439
Fixed a regular expression denial of service issue by limiting whitespaces by @prodigysml in #7360
Fix handling of UUID values having UUID.version=None by @lig in #7566
Fix __iter__ returning private cached_property info by @sydney-runkle in #7570
Improvements to version info message by @samuelcolvin in #7594

New Contributors

@15498th made their first contribution in #7238
@GabrielCappelli made their first contribution in #7213
@tobni made their first contribution in #7184
@redruin1 made their first contribution in #7282
@FacerAin made their first contribution in #7288
@acdha made their first contribution in #7297
@andree0 made their first contribution in #7319
@gordonhart made their first contribution in #7375
@pmmmwh made their first contribution in #7496
@disrupted made their first contribution in #7299
@prodigysml made their first contribution in #7360

v2.3.0 (2023-08-23)

GitHub release

🔥 Remove orphaned changes file from repo by @lig in #7168
Add copy button on documentation by @Kludex in #7190
Fix docs on JSON type by @Kludex in #7189
Update mypy 1.5.0 to 1.5.1 in CI by @hramezani in #7191
fix download links badge by @samuelcolvin in #7200
add 2.2.1 to changelog by @samuelcolvin in #7212
Make ModelWrapValidator protocols generic by @dmontagu in #7154
Correct Field(..., exclude: bool) docs by @samuelcolvin in #7214
Make shadowing attributes a warning instead of an error by @adriangb in #7193
Document Base64Str and Base64Bytes by @Kludex in #7192
Fix config.defer_build for serialization first cases by @samuelcolvin in #7024
clean Model docstrings in JSON Schema by @samuelcolvin in #7210
fix #7228 (typo): docs in validators.md to correct validate_default kwarg by @lmmx in #7229
✅ Implement tzinfo.fromutc method for TzInfo in pydantic-core by @lig in #7019
Support __get_validators__ by @hramezani in #7197

v2.2.1 (2023-08-18)

GitHub release

Make xfailing test for root model extra stop xfailing by @dmontagu in #6937
Optimize recursion detection by stopping on the second visit for the same object by @mciucu in #7160
fix link in docs by @tlambert03 in #7166
Replace MiMalloc w/ default allocator by @adriangb in pydantic/pydantic-core#900
Bump pydantic-core to 2.6.1 and prepare 2.2.1 release by @adriangb in #7176

v2.2.0 (2023-08-17)

GitHub release

Split "pipx install" setup command into two commands on the documentation site by @nomadmtb in #6869
Deprecate Field.include by @hramezani in #6852
Fix typo in default factory error msg by @hramezani in #6880
Simplify handling of typing.Annotated in GenerateSchema by @dmontagu in #6887
Re-enable fastapi tests in CI by @dmontagu in #6883
Make it harder to hit collisions with json schema defrefs by @dmontagu in #6566
Cleaner error for invalid input to Path fields by @samuelcolvin in #6903
📝 support Coordinate Type by @yezz123 in #6906
Fix ForwardRef wrapper for py 3.10.0 (shim until bpo-45166) by @randomir in #6919
Fix misbehavior related to copying of RootModel by @dmontagu in #6918
Fix issue with recursion error caused by ParamSpec by @dmontagu in #6923
Add section about Constrained classes to the Migration Guide by @Kludex in #6924
Use main branch for badge links by @Viicos in #6925
Add test for v1/v2 Annotated discrepancy by @carlbordum in #6926
Make the v1 mypy plugin work with both v1 and v2 by @dmontagu in #6921
Fix issue where generic models couldn't be parametrized with BaseModel by @dmontagu in #6933
Remove xfail for discriminated union with alias by @dmontagu in #6938
add field_serializer to computed_field by @andresliszt in #6965
Use union_schema with Type[Union[...]] by @JeanArhancet in #6952
Fix inherited typeddict attributes / config by @adriangb in #6981
fix dataclass annotated before validator called twice by @davidhewitt in #6998
Update test-fastapi deselected tests by @hramezani in #7014
Fix validator doc format by @hramezani in #7015
Fix typo in docstring of model_json_schema by @AdamVinch-Federated in #7032
remove unused "type ignores" with pyright by @samuelcolvin in #7026
Add benchmark representing FastAPI startup time by @adriangb in #7030
Fix json_encoders for Enum subclasses by @adriangb in #7029
Update docstring of ser_json_bytes regarding base64 encoding by @Viicos in #7052
Allow @validate_call to work on async methods by @adriangb in #7046
Fix: mypy error with Settings and SettingsConfigDict by @JeanArhancet in #7002
Fix some typos (repeated words and it's/its) by @eumiro in #7063
Fix the typo in docstring by @harunyasar in #7062
Docs: Fix broken URL in the pydantic-settings package recommendation by @swetjen in #6995
Handle constraints being applied to schemas that don't accept it by @adriangb in #6951
Replace almost_equal_floats with math.isclose by @eumiro in #7082
bump pydantic-core to 2.5.0 by @davidhewitt in #7077
Add short_version and use it in links by @hramezani in #7115
📝 Add usage link to RootModel by @Kludex in #7113
Revert "Fix default port for mongosrv DSNs (#6827)" by @Kludex in #7116
Clarify validate_default and _Unset handling in usage docs and migration guide by @benbenbang in #6950
Tweak documentation of Field.exclude by @Viicos in #7086
Do not require validate_assignment to use Field.frozen by @Viicos in #7103
tweaks to _core_utils by @samuelcolvin in #7040
Make DefaultDict working with set by @hramezani in #7126
Don't always require typing.Generic as a base for partially parametrized models by @dmontagu in #7119
Fix issue with JSON schema incorrectly using parent class core schema by @dmontagu in #7020
Fix xfailed test related to TypedDict and alias_generator by @dmontagu in #6940
Improve error message for NameEmail by @dmontagu in #6939
Fix generic computed fields by @dmontagu in #6988
Reflect namedtuple default values during validation by @dmontagu in #7144
Update dependencies, fix pydantic-core usage, fix CI issues by @dmontagu in #7150
Add mypy 1.5.0 by @hramezani in #7118
Handle non-json native enum values by @adriangb in #7056
document round_trip in Json type documentation by @jc-louis in #7137
Relax signature checks to better support builtins and C extension functions as validators by @adriangb in #7101
add union_mode='left_to_right' by @davidhewitt in #7151
Include an error message hint for inherited ordering by @yvalencia91 in #7124
Fix one docs link and resolve some warnings for two others by @dmontagu in #7153
Include Field extra keys name in warning by @hramezani in #7136

v2.1.1 (2023-07-25)

GitHub release

Skip FieldInfo merging when unnecessary by @dmontagu in #6862

v2.1.0 (2023-07-25)

GitHub release

Add StringConstraints for use as Annotated metadata by @adriangb in #6605
Try to fix intermittently failing CI by @adriangb in #6683
Remove redundant example of optional vs default. by @ehiggs-deliverect in #6676
Docs update by @samuelcolvin in #6692
Remove the Validate always section in validator docs by @adriangb in #6679
Fix recursion error in json schema generation by @adriangb in #6720
Fix incorrect subclass check for secretstr by @AlexVndnblcke in #6730
update pdm / pdm lockfile to 2.8.0 by @davidhewitt in #6714
unpin pdm on more CI jobs by @davidhewitt in #6755
improve source locations for auxiliary packages in docs by @davidhewitt in #6749
Assume builtins don't accept an info argument by @adriangb in #6754
Fix bug where calling help(BaseModelSubclass) raises errors by @hramezani in #6758
Fix mypy plugin handling of @model_validator(mode="after") by @ljodal in #6753
update pydantic-core to 2.3.1 by @davidhewitt in #6756
Mypy plugin for settings by @hramezani in #6760
Use contentSchema keyword for JSON schema by @dmontagu in #6715
fast-path checking finite decimals by @davidhewitt in #6769
Docs update by @samuelcolvin in #6771
Improve json schema doc by @hramezani in #6772
Update validator docs by @adriangb in #6695
Fix typehint for wrap validator by @dmontagu in #6788
🐛 Fix validation warning for unions of Literal and other type by @lig in #6628
Update documentation for generics support in V2 by @tpdorsey in #6685
add pydantic-core build info to version_info() by @samuelcolvin in #6785
Fix pydantic dataclasses that use slots with default values by @dmontagu in #6796
Fix inheritance of hash function for frozen models by @dmontagu in #6789
✨ Add SkipJsonSchema annotation by @Kludex in #6653
Error if an invalid field name is used with Field by @dmontagu in #6797
Add GenericModel to MOVED_IN_V2 by @adriangb in #6776
Remove unused code from docs/usage/types/custom.md by @hramezani in #6803
Fix float -> Decimal coercion precision loss by @adriangb in #6810
remove email validation from the north star benchmark by @davidhewitt in #6816
Fix link to mypy by @progsmile in #6824
Improve initialization hooks example by @hramezani in #6822
Fix default port for mongosrv DSNs by @dmontagu in #6827
Improve API documentation, in particular more links between usage and API docs by @samuelcolvin in #6780
update pydantic-core to 2.4.0 by @davidhewitt in #6831
Fix annotated_types.MaxLen validator for custom sequence types by @ImogenBits in #6809
Update V1 by @hramezani in #6833
Make it so callable JSON schema extra works by @dmontagu in #6798
Fix serialization issue with InstanceOf by @dmontagu in #6829
Add back support for json_encoders by @adriangb in #6811
Update field annotations when building the schema by @dmontagu in #6838
Use WeakValueDictionary to fix generic memory leak by @dmontagu in #6681
Add config.defer_build to optionally make model building lazy by @samuelcolvin in #6823
delegate UUID serialization to pydantic-core by @davidhewitt in #6850
Update json_encoders docs by @adriangb in #6848
Fix error message for staticmethod/classmethod order with validate_call by @dmontagu in #6686
Improve documentation for Config by @samuelcolvin in #6847
Update serialization doc to mention Field.exclude takes priority over call-time include/exclude by @hramezani in #6851
Allow customizing core schema generation by making GenerateSchema public by @adriangb in #6737

v2.0.3 (2023-07-05)

GitHub release

Mention PyObject (v1) moving to ImportString (v2) in migration doc by @slafs in #6456
Fix release-tweet CI by @Kludex in #6461
Revise the section on required / optional / nullable fields. by @ybressler in #6468
Warn if a type hint is not in fact a type by @adriangb in #6479
Replace TransformSchema with GetPydanticSchema by @dmontagu in #6484
Fix the un-hashability of various annotation types, for use in caching generic containers by @dmontagu in #6480
PYD-164: Rework custom types docs by @adriangb in #6490
Fix ci by @adriangb in #6507
Fix forward ref in generic by @adriangb in #6511
Fix generation of serialization JSON schemas for core_schema.ChainSchema by @dmontagu in #6515
Document the change in Field.alias behavior in Pydantic V2 by @hramezani in #6508
Give better error message attempting to compute the json schema of a model with undefined fields by @dmontagu in #6519
Document alias_priority by @tpdorsey in #6520
Add redirect for types documentation by @tpdorsey in #6513
Allow updating docs without release by @samuelcolvin in #6551
Ensure docs tests always run in the right folder by @dmontagu in #6487
Defer evaluation of return type hints for serializer functions by @dmontagu in #6516
Disable E501 from Ruff and rely on just Black by @adriangb in #6552
Update JSON Schema documentation for V2 by @tpdorsey in #6492
Add documentation of cyclic reference handling by @dmontagu in #6493
Remove the need for change files by @samuelcolvin in #6556
add "north star" benchmark by @davidhewitt in #6547
Update Dataclasses docs by @tpdorsey in #6470
♻️ Use different error message on v1 redirects by @Kludex in #6595
⬆ Upgrade pydantic-core to v2.2.0 by @lig in #6589
Fix serialization for IPvAny by @dmontagu in #6572
Improve CI by using PDM instead of pip to install typing-extensions by @adriangb in #6602
Add enum error type docs by @lig in #6603
🐛 Fix max_length for unicode strings by @lig in #6559
Add documentation for accessing features via pydantic.v1 by @tpdorsey in #6604
Include extra when iterating over a model by @adriangb in #6562
Fix typing of model_validator by @adriangb in #6514
Touch up Decimal validator by @adriangb in #6327
Fix various docstrings using fixed pytest-examples by @dmontagu in #6607
Handle function validators in a discriminated union by @dmontagu in #6570
Review json_schema.md by @tpdorsey in #6608
Make validate_call work on basemodel methods by @dmontagu in #6569
add test for big int json serde by @davidhewitt in #6614
Fix pydantic dataclass problem with dataclasses.field default_factory by @hramezani in #6616
Fixed mypy type inference for TypeAdapter by @zakstucke in #6617
Make it work to use None as a generic parameter by @dmontagu in #6609
Make it work to use $ref as an alias by @dmontagu in #6568
add note to migration guide about changes to AnyUrl etc by @davidhewitt in #6618
🐛 Support defining json_schema_extra on RootModel using Field by @lig in #6622
Update pre-commit to prevent commits to main branch on accident by @dmontagu in #6636
Fix PDM CI for python 3.7 on MacOS/windows by @dmontagu in #6627
Produce more accurate signatures for pydantic dataclasses by @dmontagu in #6633
Updates to Url types for Pydantic V2 by @tpdorsey in #6638
Fix list markdown in transform docstring by @StefanBRas in #6649
simplify slots_dataclass construction to appease mypy by @davidhewitt in #6639
Update TypedDict schema generation docstring by @adriangb in #6651
Detect and lint-error for prints by @dmontagu in #6655
Add xfailing test for pydantic-core PR 766 by @dmontagu in #6641
Ignore unrecognized fields from dataclasses metadata by @dmontagu in #6634
Make non-existent class getattr a mypy error by @dmontagu in #6658
Update pydantic-core to 2.3.0 by @hramezani in #6648
Use OrderedDict from typing_extensions by @dmontagu in #6664
Fix typehint for JSON schema extra callable by @dmontagu in #6659

v2.0.2 (2023-07-05)

GitHub release

Fix bug where round-trip pickling/unpickling a RootModel would change the value of __dict__, #6457 by @dmontagu
Allow single-item discriminated unions, #6405 by @dmontagu
Fix issue with union parsing of enums, #6440 by @dmontagu
Docs: Fixed constr documentation, renamed old regex to new pattern, #6452 by @miili
Change GenerateJsonSchema.generate_definitions signature, #6436 by @dmontagu

See the full changelog here

v2.0.1 (2023-07-04)

GitHub release

First patch release of Pydantic V2

Extra fields added via setattr (i.e. m.some_extra_field = 'extra_value') are added to .model_extra if model_config extra='allowed'. Fixed #6333, #6365 by @aaraney
Automatically unpack JSON schema '$ref' for custom types, #6343 by @adriangb
Fix tagged unions multiple processing in submodels, #6340 by @suharnikov

See the full changelog here

v2.0 (2023-06-30)

GitHub release

Pydantic V2 is here! 🎉

See this post for more details.

v2.0b3 (2023-06-16)

Third beta pre-release of Pydantic V2

See the full changelog here

v2.0b2 (2023-06-03)

Add from_attributes runtime flag to TypeAdapter.validate_python and BaseModel.model_validate.

See the full changelog here

v2.0b1 (2023-06-01)

First beta pre-release of Pydantic V2

See the full changelog here

v2.0a4 (2023-05-05)

Fourth pre-release of Pydantic V2

See the full changelog here

v2.0a3 (2023-04-20)

Third pre-release of Pydantic V2

See the full changelog here

v2.0a2 (2023-04-12)

Second pre-release of Pydantic V2

See the full changelog here

v2.0a1 (2023-04-03)

First pre-release of Pydantic V2!

See this post for more details.

v1.10.14 (2024-01-19)

Update install.md by @dmontagu in #7690
Fix ci to only deploy docs on release by @sydney-runkle in #7740
Ubuntu fixes for V1 by @sydney-runkle in #8540 and #8587
Fix cached_property handling in dataclasses when copied by @rdbisme in #8407

v1.10.13 (2023-09-27)

Fix: Add max length check to pydantic.validate_email, #7673 by @hramezani
Docs: Fix pip commands to install v1, #6930 by @chbndrhnns

v1.10.12 (2023-07-24)

Fixes the maxlen property being dropped on deque validation. Happened only if the deque item has been typed. Changes the _validate_sequence_like func, #6581 by @maciekglowka

v1.10.11 (2023-07-04)

Importing create_model in tools.py through relative path instead of absolute path - so that it doesn't import V2 code when copied over to V2 branch, #6361 by @SharathHuddar

v1.10.10 (2023-06-30)

Add Pydantic Json field support to settings management, #6250 by @hramezani
Fixed literal validator errors for unhashable values, #6188 by @markus1978
Fixed bug with generics receiving forward refs, #6130 by @mark-todd
Update install method of FastAPI for internal tests in CI, #6117 by @Kludex

v1.10.9 (2023-06-07)

Fix trailing zeros not ignored in Decimal validation, #5968 by @hramezani
Fix mypy plugin for v1.4.0, #5928 by @cdce8p
Add future and past date hypothesis strategies, #5850 by @bschoenmaeckers
Discourage usage of Cython 3 with Pydantic 1.x, #5845 by @lig

v1.10.8 (2023-05-23)

Fix a bug in Literal usage with typing-extension==4.6.0, #5826 by @hramezani
This solves the (closed) issue #3849 where aliased fields that use discriminated union fail to validate when the data contains the non-aliased field name, #5736 by @benwah
Update email-validator dependency to >=2.0.0post2, #5627 by @adriangb
update AnyClassMethod for changes in python/typeshed#9771, #5505 by @ITProKyle

v1.10.7 (2023-03-22)

Fix creating schema from model using ConstrainedStr with regex as dict key, #5223 by @matejetz
Address bug in mypy plugin caused by explicit_package_bases=True, #5191 by @dmontagu
Add implicit defaults in the mypy plugin for Field with no default argument, #5190 by @dmontagu
Fix schema generated for Enum values used as Literals in discriminated unions, #5188 by @javibookline
Fix mypy failures caused by the pydantic mypy plugin when users define from_orm in their own classes, #5187 by @dmontagu
Fix InitVar usage with pydantic dataclasses, mypy version 1.1.1 and the custom mypy plugin, #5162 by @cdce8p

v1.10.6 (2023-03-08)

Implement logic to support creating validators from non standard callables by using defaults to identify them and unwrapping functools.partial and functools.partialmethod when checking the signature, #5126 by @JensHeinrich
Fix mypy plugin for v1.1.1, and fix dataclass_transform decorator for pydantic dataclasses, #5111 by @cdce8p
Raise ValidationError, not ConfigError, when a discriminator value is unhashable, #4773 by @kurtmckee

v1.10.5 (2023-02-15)

Fix broken parametrized bases handling with GenericModels with complex sets of models, #5052 by @MarkusSintonen
Invalidate mypy cache if plugin config changes, #5007 by @cdce8p
Fix RecursionError when deep-copying dataclass types wrapped by pydantic, #4949 by @mbillingr
Fix X | Y union syntax breaking GenericModel, #4146 by @thenx
Switch coverage badge to show coverage for this branch/release, #5060 by @samuelcolvin

v1.10.4 (2022-12-30)

Change dependency to typing-extensions>=4.2.0, #4885 by @samuelcolvin

v1.10.3 (2022-12-29)

NOTE: v1.10.3 was "yanked" from PyPI due to #4885 which is fixed in v1.10.4

fix parsing of custom root models, #4883 by @gou177
fix: use dataclass proxy for frozen or empty dataclasses, #4878 by @PrettyWood
Fix schema and schema_json on models where a model instance is a one of default values, #4781 by @Bobronium
Add Jina AI to sponsors on docs index page, #4767 by @samuelcolvin
fix: support assignment on DataclassProxy, #4695 by @PrettyWood
Add postgresql+psycopg as allowed scheme for PostgreDsn to make it usable with SQLAlchemy 2, #4689 by @morian
Allow dict schemas to have both patternProperties and additionalProperties, #4641 by @jparise
Fixes error passing None for optional lists with unique_items, #4568 by @mfulgo
Fix GenericModel with Callable param raising a TypeError, #4551 by @mfulgo
Fix field regex with StrictStr type annotation, #4538 by @sisp
Correct dataclass_transform keyword argument name from field_descriptors to field_specifiers, #4500 by @samuelcolvin
fix: avoid multiple calls of __post_init__ when dataclasses are inherited, #4487 by @PrettyWood
Reduce the size of binary wheels, #2276 by @samuelcolvin

v1.10.2 (2022-09-05)

Revert Change: Revert percent encoding of URL parts which was originally added in #4224, #4470 by @samuelcolvin
Prevent long (length > 4_300) strings/bytes as input to int fields, see python/cpython#95778 and CVE-2020-10735, #1477 by @samuelcolvin
fix: dataclass wrapper was not always called, #4477 by @PrettyWood
Use tomllib on Python 3.11 when parsing mypy configuration, #4476 by @hauntsaninja
Basic fix of GenericModel cache to detect order of arguments in Union models, #4474 by @sveinugu
Fix mypy plugin when using bare types like list and dict as default_factory, #4457 by @samuelcolvin

v1.10.1 (2022-08-31)

Add __hash__ method to pydancic.color.Color class, #4454 by @czaki

v1.10.0 (2022-08-30)

Refactor the whole pydantic dataclass decorator to really act like its standard lib equivalent. It hence keeps __eq__, __hash__, ... and makes comparison with its non-validated version possible. It also fixes usage of frozen dataclasses in fields and usage of default_factory in nested dataclasses. The support of Config.extra has been added. Finally, config customization directly via a dict is now possible, #2557 by @PrettyWood

BREAKING CHANGES:
- The compiled boolean (whether pydantic is compiled with cython) has been moved from main.py to version.py
- Now that Config.extra is supported, dataclass ignores by default extra arguments (like BaseModel)
Fix PEP487 __set_name__ protocol in BaseModel for PrivateAttrs, #4407 by @tlambert03
Allow for custom parsing of environment variables via parse_env_var in Config, #4406 by @acmiyaguchi
Rename master to main, #4405 by @hramezani
Fix StrictStr does not raise ValidationError when max_length is present in Field, #4388 by @hramezani
Make SecretStr and SecretBytes hashable, #4387 by @chbndrhnns
Fix StrictBytes does not raise ValidationError when max_length is present in Field, #4380 by @JeanArhancet
Add support for bare type, #4375 by @hramezani
Support Python 3.11, including binaries for 3.11 in PyPI, #4374 by @samuelcolvin
Add support for re.Pattern, #4366 by @hramezani
Fix __post_init_post_parse__ is incorrectly passed keyword arguments when no __post_init__ is defined, #4361 by @hramezani
Fix implicitly importing ForwardRef and Callable from pydantic.typing instead of typing and also expose MappingIntStrAny, #4358 by @aminalaee
remove Any types from the dataclass decorator so it can be used with the disallow_any_expr mypy option, #4356 by @DetachHead
moved repo to pydantic/pydantic, #4348 by @yezz123
fix "extra fields not permitted" error when dataclass with Extra.forbid is validated multiple times, #4343 by @detachhead
Add Python 3.9 and 3.10 examples to docs, #4339 by @Bobronium
Discriminated union models now use oneOf instead of anyOf when generating OpenAPI schema definitions, #4335 by @MaxwellPayne
Allow type checkers to infer inner type of Json type. Json[list[str]] will be now inferred as list[str], Json[Any] should be used instead of plain Json. Runtime behaviour is not changed, #4332 by @Bobronium
Allow empty string aliases by using a alias is not None check, rather than bool(alias), #4253 by @sergeytsaplin
Update ForwardRefs in Field.outer_type_, #4249 by @JacobHayes
The use of __dataclass_transform__ has been replaced by typing_extensions.dataclass_transform, which is the preferred way to mark pydantic models as a dataclass under PEP 681, #4241 by @multimeric
Use parent model's Config when validating nested NamedTuple fields, #4219 by @synek
Update BaseModel.construct to work with aliased Fields, #4192 by @kylebamos
Catch certain raised errors in smart_deepcopy and revert to deepcopy if so, #4184 by @coneybeare
Add Config.anystr_upper and to_upper kwarg to constr and conbytes, #4165 by @satheler
Fix JSON schema for set and frozenset when they include default values, #4155 by @aminalaee
Teach the mypy plugin that methods decorated by @validator are classmethods, #4102 by @DMRobertson
Improve mypy plugin's ability to detect required fields, #4086 by @richardxia
Support fields of type Type[] in schema, #4051 by @aminalaee
Add default value in JSON Schema when const=True, #4031 by @aminalaee
Adds reserved word check to signature generation logic, #4011 by @strue36
Fix Json strategy failure for the complex nested field, #4005 by @sergiosim
Add JSON-compatible float constraint allow_inf_nan, #3994 by @tiangolo
Remove undefined behaviour when env_prefix had characters in common with env_nested_delimiter, #3975 by @arsenron
Support generics model with create_model, #3945 by @hot123s
allow submodels to overwrite extra field info, #3934 by @PrettyWood
Document and test structural pattern matching (PEP 636) on BaseModel, #3920 by @irgolic
Fix incorrect deserialization of python timedelta object to ISO 8601 for negative time deltas. Minus was serialized in incorrect place ("P-1DT23H59M59.888735S" instead of correct "-P1DT23H59M59.888735S"), #3899 by @07pepa
Fix validation of discriminated union fields with an alias when passing a model instance, #3846 by @chornsby
Add a CockroachDsn type to validate CockroachDB connection strings. The type supports the following schemes: cockroachdb, cockroachdb+psycopg2 and cockroachdb+asyncpg, #3839 by @blubber
Fix MyPy plugin to not override pre-existing __init__ method in models, #3824 by @patrick91
Fix mypy version checking, #3783 by @KotlinIsland
support overwriting dunder attributes of BaseModel instances, #3777 by @PrettyWood
Added ConstrainedDate and condate, #3740 by @hottwaj
Support kw_only in dataclasses, #3670 by @detachhead
Add comparison method for Color class, #3646 by @aminalaee
Drop support for python3.6, associated cleanup, #3605 by @samuelcolvin
created new function to_lower_camel() for "non pascal case" camel case, #3463 by @schlerp
Add checks to default and default_factory arguments in Mypy plugin, #3430 by @klaa97
fix mangling of inspect.signature for BaseModel, #3413 by @fix-inspect-signature
Adds the SecretField abstract class so that all the current and future secret fields like SecretStr and SecretBytes will derive from it, #3409 by @expobrain
Support multi hosts validation in PostgresDsn, #3337 by @rglsk
Fix parsing of very small numeric timedelta values, #3315 by @samuelcolvin
Update SecretsSettingsSource to respect config.case_sensitive, #3273 by @JeanArhancet
Add MongoDB network data source name (DSN) schema, #3229 by @snosratiershad
Add support for multiple dotenv files, #3222 by @rekyungmin
Raise an explicit ConfigError when multiple fields are incorrectly set for a single validator, #3215 by @SunsetOrange
Allow ellipsis on Fields inside Annotated for TypedDicts required, #3133 by @ezegomez
Catch overflow errors in int_validator, #3112 by @ojii
Adds a __rich_repr__ method to Representation class which enables pretty printing with Rich, #3099 by @willmcgugan
Add percent encoding in AnyUrl and descendent types, #3061 by @FaresAhmedb
validate_arguments decorator now supports alias, #3019 by @MAD-py
Avoid __dict__ and __weakref__ attributes in AnyUrl and IP address fields, #2890 by @nuno-andre
Add ability to use Final in a field type annotation, #2766 by @uriyyo
Update requirement to typing_extensions>=4.1.0 to guarantee dataclass_transform is available, #4424 by @commonism
Add Explosion and AWS to main sponsors, #4413 by @samuelcolvin
Update documentation for copy_on_model_validation to reflect recent changes, #4369 by @samuelcolvin
Runtime warning if __slots__ is passed to create_model, __slots__ is then ignored, #4432 by @samuelcolvin
Add type hints to BaseSettings.Config to avoid mypy errors, also correct mypy version compatibility notice in docs, #4450 by @samuelcolvin

v1.10.0b1 (2022-08-24)

Pre-release, see the GitHub release for details.

v1.10.0a2 (2022-08-24)

Pre-release, see the GitHub release for details.

v1.10.0a1 (2022-08-22)

Pre-release, see the GitHub release for details.

v1.9.2 (2022-08-11)

Revert Breaking Change: v1.9.1 introduced a breaking change where model fields were deep copied by default, this release reverts the default behaviour to match v1.9.0 and before, while also allow deep-copy behaviour via copy_on_model_validation = 'deep'. See #4092 for more information.

Allow for shallow copies of model fields, Config.copy_on_model_validation is now a str which must be 'none', 'deep', or 'shallow' corresponding to not copying, deep copy & shallow copy; default 'shallow', #4093 by @timkpaine

v1.9.1 (2022-05-19)

Thank you to pydantic's sponsors: @tiangolo, @stellargraph, @JonasKs, @grillazz, @Mazyod, @kevinalh, @chdsbd, @povilasb, @povilasb, @jina-ai, @mainframeindustries, @robusta-dev, @SendCloud, @rszamszur, @jodal, @hardbyte, @corleyma, @daddycocoaman, @Rehket, @jokull, @reillysiemens, @westonsteimel, @primer-io, @koxudaxi, @browniebroke, @stradivari96, @adriangb, @kamalgill, @jqueguiner, @dev-zero, @datarootsio, @RedCarpetUp for their kind support.

Limit the size of generics._generic_types_cache and generics._assigned_parameters to avoid unlimited increase in memory usage, #4083 by @samuelcolvin
Add Jupyverse and FPS as Jupyter projects using pydantic, #4082 by @davidbrochart
Speedup __isinstancecheck__ on pydantic models when the type is not a model, may also avoid memory "leaks", #4081 by @samuelcolvin
Fix in-place modification of FieldInfo that caused problems with PEP 593 type aliases, #4067 by @adriangb
Add support for autocomplete in VS Code via __dataclass_transform__ when using pydantic.dataclasses.dataclass, #4006 by @giuliano-oliveira
Remove benchmarks from codebase and docs, #3973 by @samuelcolvin
Typing checking with pyright in CI, improve docs on vscode/pylance/pyright, #3972 by @samuelcolvin
Fix nested Python dataclass schema regression, #3819 by @himbeles
Update documentation about lazy evaluation of sources for Settings, #3806 by @garyd203
Prevent subclasses of bytes being converted to bytes, #3706 by @samuelcolvin
Fixed "error checking inheritance of" when using PEP585 and PEP604 type hints, #3681 by @aleksul
Allow self referencing ClassVars in models, #3679 by @samuelcolvin
Breaking Change, see #4106: Fix issue with self-referencing dataclass, #3675 by @uriyyo
Include non-standard port numbers in rendered URLs, #3652 by @dolfinus
Config.copy_on_model_validation does a deep copy and not a shallow one, #3641 by @PrettyWood
fix: clarify that discriminated unions do not support singletons, #3636 by @tommilligan
Add read_text(encoding='utf-8') for setup.py, #3625 by @hswong3i
Fix JSON Schema generation for Discriminated Unions within lists, #3608 by @samuelcolvin

v1.9.0 (2021-12-31)

Thank you to pydantic's sponsors: @sthagen, @timdrijvers, @toinbis, @koxudaxi, @ginomempin, @primer-io, @and-semakin, @westonsteimel, @reillysiemens, @es3n1n, @jokull, @JonasKs, @Rehket, @corleyma, @daddycocoaman, @hardbyte, @datarootsio, @jodal, @aminalaee, @rafsaf, @jqueguiner, @chdsbd, @kevinalh, @Mazyod, @grillazz, @JonasKs, @simw, @leynier, @xfenix for their kind support.

Highlights

add Python 3.10 support, #2885 by @PrettyWood
Discriminated unions, #619 by @PrettyWood
Config.smart_union for better union logic, #2092 by @PrettyWood
Binaries for Macos M1 CPUs, #3498 by @samuelcolvin
Complex types can be set via nested environment variables, e.g. foo___bar, #3159 by @Air-Mark
add a dark mode to pydantic documentation, #2913 by @gbdlin
Add support for autocomplete in VS Code via __dataclass_transform__, #2721 by @tiangolo
Add "exclude" as a field parameter so that it can be configured using model config, #660 by @daviskirk

v1.9.0 (2021-12-31) Changes

Apply update_forward_refs to Config.json_encodes prevent name clashes in types defined via strings, #3583 by @samuelcolvin
Extend pydantic's mypy plugin to support mypy versions 0.910, 0.920, 0.921 & 0.930, #3573 & #3594 by @PrettyWood, @christianbundy, @samuelcolvin

v1.9.0a2 (2021-12-24) Changes

support generic models with discriminated union, #3551 by @PrettyWood
keep old behaviour of json() by default, #3542 by @PrettyWood
Removed typing-only __root__ attribute from BaseModel, #3540 by @layday
Build Python 3.10 wheels, #3539 by @mbachry
Fix display of extra fields with model __repr__, #3234 by @cocolman
models copied via Config.copy_on_model_validation always have all fields, #3201 by @PrettyWood
nested ORM from nested dictionaries, #3182 by @PrettyWood
fix link to discriminated union section by @PrettyWood

v1.9.0a1 (2021-12-18) Changes

Add support for Decimal-specific validation configurations in Field(), additionally to using condecimal(), to allow better support from editors and tooling, #3507 by @tiangolo
Add arm64 binaries suitable for MacOS with an M1 CPU to PyPI, #3498 by @samuelcolvin
Fix issue where None was considered invalid when using a Union type containing Any or object, #3444 by @tharradine
When generating field schema, pass optional field argument (of type pydantic.fields.ModelField) to __modify_schema__() if present, #3434 by @jasujm
Fix issue when pydantic fail to parse typing.ClassVar string type annotation, #3401 by @uriyyo
Mention Python >= 3.9.2 as an alternative to typing_extensions.TypedDict, #3374 by @BvB93
Changed the validator method name in the Custom Errors example to more accurately describe what the validator is doing; changed from name_must_contain_space to value_must_equal_bar, #3327 by @michaelrios28
Add AmqpDsn class, #3254 by @kludex
Always use Enum value as default in generated JSON schema, #3190 by @joaommartins
Add support for Mypy 0.920, #3175 by @christianbundy
validate_arguments now supports extra customization (used to always be Extra.forbid), #3161 by @PrettyWood
Complex types can be set by nested environment variables, #3159 by @Air-Mark
Fix mypy plugin to collect fields based on pydantic.utils.is_valid_field so that it ignores untyped private variables, #3146 by @hi-ogawa
fix validate_arguments issue with Config.validate_all, #3135 by @PrettyWood
avoid dict coercion when using dict subclasses as field type, #3122 by @PrettyWood
add support for object type, #3062 by @PrettyWood
Updates pydantic dataclasses to keep _special properties on parent classes, #3043 by @zulrang
Add a TypedDict class for error objects, #3038 by @matthewhughes934
Fix support for using a subclass of an annotation as a default, #3018 by @JacobHayes
make create_model_from_typeddict mypy compliant, #3008 by @PrettyWood
Make multiple inheritance work when using PrivateAttr, #2989 by @hmvp
Parse environment variables as JSON, if they have a Union type with a complex subfield, #2936 by @cbartz
Prevent StrictStr permitting Enum values where the enum inherits from str, #2929 by @samuelcolvin
Make SecretsSettingsSource parse values being assigned to fields of complex types when sourced from a secrets file, just as when sourced from environment variables, #2917 by @davidmreed
add a dark mode to pydantic documentation, #2913 by @gbdlin
Make pydantic-mypy plugin compatible with pyproject.toml configuration, consistent with mypy changes. See the doc for more information, #2908 by @jrwalk
add Python 3.10 support, #2885 by @PrettyWood
Correctly parse generic models with Json[T], #2860 by @geekingfrog
Update contrib docs re: Python version to use for building docs, #2856 by @paxcodes
Clarify documentation about pydantic's support for custom validation and strict type checking, despite pydantic being primarily a parsing library, #2855 by @paxcodes
Fix schema generation for Deque fields, #2810 by @sergejkozin
fix an edge case when mixing constraints and Literal, #2794 by @PrettyWood
Fix postponed annotation resolution for NamedTuple and TypedDict when they're used directly as the type of fields within Pydantic models, #2760 by @jameysharp
Fix bug when mypy plugin fails on construct method call for BaseSettings derived classes, #2753 by @uriyyo
Add function overloading for a pydantic.create_model function, #2748 by @uriyyo
Fix mypy plugin issue with self field declaration, #2743 by @uriyyo
The colon at the end of the line "The fields which were supplied when user was initialised:" suggests that the code following it is related. Changed it to a period, #2733 by @krisaoe
Renamed variable schema to schema_ to avoid shadowing of global variable name, #2724 by @shahriyarr
Add support for autocomplete in VS Code via __dataclass_transform__, #2721 by @tiangolo
add missing type annotations in BaseConfig and handle max_length = 0, #2719 by @PrettyWood
Change orm_mode checking to allow recursive ORM mode parsing with dicts, #2718 by @nuno-andre
Add episode 313 of the Talk Python To Me podcast, where Michael Kennedy and Samuel Colvin discuss Pydantic, to the docs, #2712 by @RatulMaharaj
fix JSON schema generation when a field is of type NamedTuple and has a default value, #2707 by @PrettyWood
Enum fields now properly support extra kwargs in schema generation, #2697 by @sammchardy
Breaking Change, see #3780: Make serialization of referenced pydantic models possible, #2650 by @PrettyWood
Add uniqueItems option to ConstrainedList, #2618 by @nuno-andre
Try to evaluate forward refs automatically at model creation, #2588 by @uriyyo
Switch docs preview and coverage display to use smokeshow, #2580 by @samuelcolvin
Add __version__ attribute to pydantic module, #2572 by @paxcodes
Add postgresql+asyncpg, postgresql+pg8000, postgresql+psycopg2, postgresql+psycopg2cffi, postgresql+py-postgresql and postgresql+pygresql schemes for PostgresDsn, #2567 by @postgres-asyncpg
Enable the Hypothesis plugin to generate a constrained decimal when the decimal_places argument is specified, #2524 by @cwe5590
Allow collections.abc.Callable to be used as type in Python 3.9, #2519 by @daviskirk
Documentation update how to custom compile pydantic when using pip install, small change in setup.py to allow for custom CFLAGS when compiling, #2517 by @peterroelants
remove side effect of default_factory to run it only once even if Config.validate_all is set, #2515 by @PrettyWood
Add lookahead to ip regexes for AnyUrl hosts. This allows urls with DNS labels looking like IPs to validate as they are perfectly valid host names, #2512 by @sbv-csis
Set minItems and maxItems in generated JSON schema for fixed-length tuples, #2497 by @PrettyWood
Add strict argument to conbytes, #2489 by @koxudaxi
Support user defined generic field types in generic models, #2465 by @daviskirk
Add an example and a short explanation of subclassing GetterDict to docs, #2463 by @nuno-andre
add KafkaDsn type, HttpUrl now has default port 80 for http and 443 for https, #2447 by @MihanixA
Add PastDate and FutureDate types, #2425 by @Kludex
Support generating schema for Generic fields with subtypes, #2375 by @maximberg
fix(encoder): serialize NameEmail to str, #2341 by @alecgerona
add Config.smart_union to prevent coercion in Union if possible, see the doc for more information, #2092 by @PrettyWood
Add ability to use typing.Counter as a model field type, #2060 by @uriyyo
Add parameterised subclasses to __bases__ when constructing new parameterised classes, so that A <: B => A[int] <: B[int], #2007 by @diabolo-dan
Create FileUrl type that allows URLs that conform to RFC 8089. Add host_required parameter, which is True by default (AnyUrl and subclasses), False in RedisDsn, FileUrl, #1983 by @vgerak
add confrozenset(), analogous to conset() and conlist(), #1897 by @PrettyWood
stop calling parent class root_validator if overridden, #1895 by @PrettyWood
Add repr (defaults to True) parameter to Field, to hide it from the default representation of the BaseModel, #1831 by @fnep
Accept empty query/fragment URL parts, #1807 by @xavier

v1.8.2 (2021-05-11)

!!! warning A security vulnerability, level "moderate" is fixed in v1.8.2. Please upgrade ASAP. See security advisory CVE-2021-29510

Security fix: Fix date and datetime parsing so passing either 'infinity' or float('inf') (or their negative values) does not cause an infinite loop, see security advisory CVE-2021-29510
fix schema generation with Enum by generating a valid name, #2575 by @PrettyWood
fix JSON schema generation with a Literal of an enum member, #2536 by @PrettyWood
Fix bug with configurations declarations that are passed as keyword arguments during class creation, #2532 by @uriyyo
Allow passing json_encoders in class kwargs, #2521 by @layday
support arbitrary types with custom __eq__, #2483 by @PrettyWood
support Annotated in validate_arguments and in generic models with Python 3.9, #2483 by @PrettyWood

v1.8.1 (2021-03-03)

Bug fixes for regressions and new features from v1.8

allow elements of Config.field to update elements of a Field, #2461 by @samuelcolvin
fix validation with a BaseModel field and a custom root type, #2449 by @PrettyWood
expose Pattern encoder to fastapi, #2444 by @PrettyWood
enable the Hypothesis plugin to generate a constrained float when the multiple_of argument is specified, #2442 by @tobi-lipede-oodle
Avoid RecursionError when using some types like Enum or Literal with generic models, #2436 by @PrettyWood
do not overwrite declared __hash__ in subclasses of a model, #2422 by @PrettyWood
fix mypy complaints on Path and UUID related custom types, #2418 by @PrettyWood
Support properly variable length tuples of compound types, #2416 by @PrettyWood

v1.8 (2021-02-26)

Thank you to pydantic's sponsors: @jorgecarleitao, @BCarley, @chdsbd, @tiangolo, @matin, @linusg, @kevinalh, @koxudaxi, @timdrijvers, @mkeen, @meadsteve, @ginomempin, @primer-io, @and-semakin, @tomthorogood, @AjitZK, @westonsteimel, @Mazyod, @christippett, @CarlosDomingues, @Kludex, @r-m-n for their kind support.

Highlights

Hypothesis plugin for testing, #2097 by @Zac-HD
support for NamedTuple and TypedDict, #2216 by @PrettyWood
Support Annotated hints on model fields, #2147 by @JacobHayes
frozen parameter on Config to allow models to be hashed, #1880 by @rhuille

Changes

Breaking Change, remove old deprecation aliases from v1, #2415 by @samuelcolvin:
- remove notes on migrating to v1 in docs
- remove Schema which was replaced by Field
- remove Config.case_insensitive which was replaced by Config.case_sensitive (default False)
- remove Config.allow_population_by_alias which was replaced by Config.allow_population_by_field_name
- remove model.fields which was replaced by model.__fields__
- remove model.to_string() which was replaced by str(model)
- remove model.__values__ which was replaced by model.__dict__
Breaking Change: always validate only first sublevel items with each_item. There were indeed some edge cases with some compound types where the validated items were the last sublevel ones, #1933 by @PrettyWood
Update docs extensions to fix local syntax highlighting, #2400 by @daviskirk
fix: allow utils.lenient_issubclass to handle typing.GenericAlias objects like list[str] in Python >= 3.9, #2399 by @daviskirk
Improve field declaration for pydantic dataclass by allowing the usage of pydantic Field or 'metadata' kwarg of dataclasses.field, #2384 by @PrettyWood
Making typing-extensions a required dependency, #2368 by @samuelcolvin
Make resolve_annotations more lenient, allowing for missing modules, #2363 by @samuelcolvin
Allow configuring models through class kwargs, #2356 by @Bobronium
Prevent Mapping subclasses from always being coerced to dict, #2325 by @ofek
fix: allow None for type Optional[conset / conlist], #2320 by @PrettyWood
Support empty tuple type, #2318 by @PrettyWood
fix: python_requires metadata to require >=3.6.1, #2306 by @hukkinj1
Properly encode Decimal with, or without any decimal places, #2293 by @hultner
fix: update __fields_set__ in BaseModel.copy(update=…), #2290 by @PrettyWood
fix: keep order of fields with BaseModel.construct(), #2281 by @PrettyWood
Support generating schema for Generic fields, #2262 by @maximberg
Fix validate_decorator so **kwargs doesn't exclude values when the keyword has the same name as the *args or **kwargs names, #2251 by @cybojenix
Prevent overriding positional arguments with keyword arguments in validate_arguments, as per behaviour with native functions, #2249 by @cybojenix
add documentation for con* type functions, #2242 by @tayoogunbiyi
Support custom root type (aka __root__) when using parse_obj() with nested models, #2238 by @PrettyWood
Support custom root type (aka __root__) with from_orm(), #2237 by @PrettyWood
ensure cythonized functions are left untouched when creating models, based on #1944 by @kollmats, #2228 by @samuelcolvin
Resolve forward refs for stdlib dataclasses converted into pydantic ones, #2220 by @PrettyWood
Add support for NamedTuple and TypedDict types. Those two types are now handled and validated when used inside BaseModel or pydantic dataclass. Two utils are also added create_model_from_namedtuple and create_model_from_typeddict, #2216 by @PrettyWood
Do not ignore annotated fields when type is Union[Type[...], ...], #2213 by @PrettyWood
Raise a user-friendly TypeError when a root_validator does not return a dict (e.g. None), #2209 by @masalim2
Add a FrozenSet[str] type annotation to the allowed_schemes argument on the strict_url field type, #2198 by @Midnighter
add allow_mutation constraint to Field, #2195 by @sblack-usu
Allow Field with a default_factory to be used as an argument to a function decorated with validate_arguments, #2176 by @thomascobb
Allow non-existent secrets directory by only issuing a warning, #2175 by @davidolrik
fix URL regex to parse fragment without query string, #2168 by @andrewmwhite
fix: ensure to always return one of the values in Literal field type, #2166 by @PrettyWood
Support typing.Annotated hints on model fields. A Field may now be set in the type hint with Annotated[..., Field(...); all other annotations are ignored but still visible with get_type_hints(..., include_extras=True), #2147 by @JacobHayes
Added StrictBytes type as well as strict=False option to ConstrainedBytes, #2136 by @rlizzo
added Config.anystr_lower and to_lower kwarg to constr and conbytes, #2134 by @tayoogunbiyi
Support plain typing.Tuple type, #2132 by @PrettyWood
Add a bound method validate to functions decorated with validate_arguments to validate parameters without actually calling the function, #2127 by @PrettyWood
Add the ability to customize settings sources (add / disable / change priority order), #2107 by @kozlek
Fix mypy complaints about most custom pydantic types, #2098 by @PrettyWood
Add a Hypothesis plugin for easier property-based testing with Pydantic's custom types - usage details here, #2097 by @Zac-HD
add validator for None, NoneType or Literal[None], #2095 by @PrettyWood
Handle properly fields of type Callable with a default value, #2094 by @PrettyWood
Updated create_model return type annotation to return type which inherits from __base__ argument, #2071 by @uriyyo
Add merged json_encoders inheritance, #2064 by @art049
allow overwriting ClassVars in sub-models without having to re-annotate them, #2061 by @layday
add default encoder for Pattern type, #2045 by @PrettyWood
Add NonNegativeInt, NonPositiveInt, NonNegativeFloat, NonPositiveFloat, #1975 by @mdavis-xyz
Use % for percentage in string format of colors, #1960 by @EdwardBetts
Fixed issue causing KeyError to be raised when building schema from multiple BaseModel with the same names declared in separate classes, #1912 by @JSextonn
Add rediss (Redis over SSL) protocol to RedisDsn Allow URLs without user part (e.g., rediss://:pass@localhost), #1911 by @TrDex
Add a new frozen boolean parameter to Config (default: False). Setting frozen=True does everything that allow_mutation=False does, and also generates a __hash__() method for the model. This makes instances of the model potentially hashable if all the attributes are hashable, #1880 by @rhuille
fix schema generation with multiple Enums having the same name, #1857 by @PrettyWood
Added support for 13/19 digits VISA credit cards in PaymentCardNumber type, #1416 by @AlexanderSov
fix: prevent RecursionError while using recursive GenericModels, #1370 by @xppt
use enum for typing.Literal in JSON schema, #1350 by @PrettyWood
Fix: some recursive models did not require update_forward_refs and silently behaved incorrectly, #1201 by @PrettyWood
Fix bug where generic models with fields where the typevar is nested in another type a: List[T] are considered to be concrete. This allows these models to be subclassed and composed as expected, #947 by @daviskirk
Add Config.copy_on_model_validation flag. When set to False, pydantic will keep models used as fields untouched on validation instead of reconstructing (copying) them, #265 by @PrettyWood

v1.7.4 (2021-05-11)

Security fix: Fix date and datetime parsing so passing either 'infinity' or float('inf') (or their negative values) does not cause an infinite loop, See security advisory CVE-2021-29510

v1.7.3 (2020-11-30)

Thank you to pydantic's sponsors: @timdrijvers, @BCarley, @chdsbd, @tiangolo, @matin, @linusg, @kevinalh, @jorgecarleitao, @koxudaxi, @primer-api, @mkeen, @meadsteve for their kind support.

fix: set right default value for required (optional) fields, #2142 by @PrettyWood
fix: support underscore_attrs_are_private with generic models, #2138 by @PrettyWood
fix: update all modified field values in root_validator when validate_assignment is on, #2116 by @PrettyWood
Allow pickling of pydantic.dataclasses.dataclass dynamically created from a built-in dataclasses.dataclass, #2111 by @aimestereo
Fix a regression where Enum fields would not propagate keyword arguments to the schema, #2109 by @bm424
Ignore __doc__ as private attribute when Config.underscore_attrs_are_private is set, #2090 by @PrettyWood

v1.7.2 (2020-11-01)

fix slow GenericModel concrete model creation, allow GenericModel concrete name reusing in module, #2078 by @Bobronium
keep the order of the fields when validate_assignment is set, #2073 by @PrettyWood
forward all the params of the stdlib dataclass when converted into pydantic dataclass, #2065 by @PrettyWood

v1.7.1 (2020-10-28)

Thank you to pydantic's sponsors: @timdrijvers, @BCarley, @chdsbd, @tiangolo, @matin, @linusg, @kevinalh, @jorgecarleitao, @koxudaxi, @primer-api, @mkeen for their kind support.

fix annotation of validate_arguments when passing configuration as argument, #2055 by @layday
Fix mypy assignment error when using PrivateAttr, #2048 by @aphedges
fix underscore_attrs_are_private causing TypeError when overriding __init__, #2047 by @samuelcolvin
Fixed regression introduced in v1.7 involving exception handling in field validators when validate_assignment=True, #2044 by @johnsabath
fix: pydantic dataclass can inherit from stdlib dataclass and Config.arbitrary_types_allowed is supported, #2042 by @PrettyWood

v1.7 (2020-10-26)

Thank you to pydantic's sponsors: @timdrijvers, @BCarley, @chdsbd, @tiangolo, @matin, @linusg, @kevinalh, @jorgecarleitao, @koxudaxi, @primer-api for their kind support.

Highlights

Python 3.9 support, thanks @PrettyWood
Private model attributes, thanks @Bobronium
"secrets files" support in BaseSettings, thanks @mdgilene
convert stdlib dataclasses to pydantic dataclasses and use stdlib dataclasses in models, thanks @PrettyWood

Changes

Breaking Change: remove __field_defaults__, add default_factory support with BaseModel.construct. Use .get_default() method on fields in __fields__ attribute instead, #1732 by @PrettyWood
Rearrange CI to run linting as a separate job, split install recipes for different tasks, #2020 by @samuelcolvin
Allows subclasses of generic models to make some, or all, of the superclass's type parameters concrete, while also defining new type parameters in the subclass, #2005 by @choogeboom
Call validator with the correct values parameter type in BaseModel.__setattr__, when validate_assignment = True in model config, #1999 by @me-ransh
Force fields.Undefined to be a singleton object, fixing inherited generic model schemas, #1981 by @daviskirk
Include tests in source distributions, #1976 by @sbraz
Add ability to use min_length/max_length constraints with secret types, #1974 by @uriyyo
Also check root_validators when validate_assignment is on, #1971 by @PrettyWood
Fix const validators not running when custom validators are present, #1957 by @hmvp
add deque to field types, #1935 by @wozniakty
add basic support for Python 3.9, #1832 by @PrettyWood
Fix typo in the anchor of exporting_models.md#modelcopy and incorrect description, #1821 by @KimMachineGun
Added ability for BaseSettings to read "secret files", #1820 by @mdgilene
add parse_raw_as utility function, #1812 by @PrettyWood
Support home directory relative paths for dotenv files (e.g. ~/.env), #1803 by @PrettyWood
Clarify documentation for parse_file to show that the argument should be a file path not a file-like object, #1794 by @mdavis-xyz
Fix false positive from mypy plugin when a class nested within a BaseModel is named Model, #1770 by @selimb
add basic support of Pattern type in schema generation, #1767 by @PrettyWood
Support custom title, description and default in schema of enums, #1748 by @PrettyWood
Properly represent Literal Enums when use_enum_values is True, #1747 by @noelevans
Allows timezone information to be added to strings to be formatted as time objects. Permitted formats are Z for UTC or an offset for absolute positive or negative time shifts. Or the timezone data can be omitted, #1744 by @noelevans
Add stub __init__ with Python 3.6 signature for ForwardRef, #1738 by @sirtelemak
Fix behaviour with forward refs and optional fields in nested models, #1736 by @PrettyWood
add Enum and IntEnum as valid types for fields, #1735 by @PrettyWood
Change default value of __module__ argument of create_model from None to 'pydantic.main'. Set reference of created concrete model to it's module to allow pickling (not applied to models created in functions), #1686 by @Bobronium
Add private attributes support, #1679 by @Bobronium
add config to @validate_arguments, #1663 by @samuelcolvin
Allow descendant Settings models to override env variable names for the fields defined in parent Settings models with env in their Config. Previously only env_prefix configuration option was applicable, #1561 by @ojomio
Support ref_template when creating schema $refs, #1479 by @kilo59
Add a __call__ stub to PyObject so that mypy will know that it is callable, #1352 by @brianmaissy
pydantic.dataclasses.dataclass decorator now supports built-in dataclasses.dataclass. It is hence possible to convert an existing dataclass easily to add Pydantic validation. Moreover nested dataclasses are also supported, #744 by @PrettyWood

v1.6.2 (2021-05-11)

Security fix: Fix date and datetime parsing so passing either 'infinity' or float('inf') (or their negative values) does not cause an infinite loop, See security advisory CVE-2021-29510

v1.6.1 (2020-07-15)

fix validation and parsing of nested models with default_factory, #1710 by @PrettyWood

v1.6 (2020-07-11)

Thank you to pydantic's sponsors: @matin, @tiangolo, @chdsbd, @jorgecarleitao, and 1 anonymous sponsor for their kind support.

Modify validators for conlist and conset to not have always=True, #1682 by @samuelcolvin
add port check to AnyUrl (can't exceed 65536) ports are 16 insigned bits: 0 <= port <= 2**16-1 src: rfc793 header format, #1654 by @flapili
Document default regex anchoring semantics, #1648 by @yurikhan
Use chain.from_iterable in class_validators.py. This is a faster and more idiomatic way of using itertools.chain. Instead of computing all the items in the iterable and storing them in memory, they are computed one-by-one and never stored as a huge list. This can save on both runtime and memory space, #1642 by @cool-RR
Add conset(), analogous to conlist(), #1623 by @patrickkwang
make Pydantic errors (un)pickable, #1616 by @PrettyWood
Allow custom encoding for dotenv files, #1615 by @PrettyWood
Ensure SchemaExtraCallable is always defined to get type hints on BaseConfig, #1614 by @PrettyWood
Update datetime parser to support negative timestamps, #1600 by @mlbiche
Update mypy, remove AnyType alias for Type[Any], #1598 by @samuelcolvin
Adjust handling of root validators so that errors are aggregated from all failing root validators, instead of reporting on only the first root validator to fail, #1586 by @beezee
Make __modify_schema__ on Enums apply to the enum schema rather than fields that use the enum, #1581 by @therefromhere
Fix behavior of __all__ key when used in conjunction with index keys in advanced include/exclude of fields that are sequences, #1579 by @xspirus
Subclass validators do not run when referencing a List field defined in a parent class when each_item=True. Added an example to the docs illustrating this, #1566 by @samueldeklund
change schema.field_class_to_schema to support frozenset in schema, #1557 by @wangpeibao
Call __modify_schema__ only for the field schema, #1552 by @PrettyWood
Move the assignment of field.validate_always in fields.py so the always parameter of validators work on inheritance, #1545 by @dcHHH
Added support for UUID instantiation through 16 byte strings such as b'\x12\x34\x56\x78' * 4. This was done to support BINARY(16) columns in sqlalchemy, #1541 by @shawnwall
Add a test assertion that default_factory can return a singleton, #1523 by @therefromhere
Add NameEmail.__eq__ so duplicate NameEmail instances are evaluated as equal, #1514 by @stephen-bunn
Add datamodel-code-generator link in pydantic document site, #1500 by @koxudaxi
Added a "Discussion of Pydantic" section to the documentation, with a link to "Pydantic Introduction" video by Alexander Hultnér, #1499 by @hultner
Avoid some side effects of default_factory by calling it only once if possible and by not setting a default value in the schema, #1491 by @PrettyWood
Added docs about dumping dataclasses to JSON, #1487 by @mikegrima
Make BaseModel.__signature__ class-only, so getting __signature__ from model instance will raise AttributeError, #1466 by @Bobronium
include 'format': 'password' in the schema for secret types, #1424 by @atheuz
Modify schema constraints on ConstrainedFloat so that exclusiveMinimum and minimum are not included in the schema if they are equal to -math.inf and exclusiveMaximum and maximum are not included if they are equal to math.inf, #1417 by @vdwees
Squash internal __root__ dicts in .dict() (and, by extension, in .json()), #1414 by @patrickkwang
Move const validator to post-validators so it validates the parsed value, #1410 by @selimb
Fix model validation to handle nested literals, e.g. Literal['foo', Literal['bar']], #1364 by @DBCerigo
Remove user_required = True from RedisDsn, neither user nor password are required, #1275 by @samuelcolvin
Remove extra allOf from schema for fields with Union and custom Field, #1209 by @mostaphaRoudsari
Updates OpenAPI schema generation to output all enums as separate models. Instead of inlining the enum values in the model schema, models now use a $ref property to point to the enum definition, #1173 by @calvinwyoung

v1.5.1 (2020-04-23)

Signature generation with extra: allow never uses a field name, #1418 by @prettywood
Avoid mutating Field default value, #1412 by @prettywood

v1.5 (2020-04-18)

Make includes/excludes arguments for .dict(), ._iter(), ..., immutable, #1404 by @AlexECX
Always use a field's real name with includes/excludes in model._iter(), regardless of by_alias, #1397 by @AlexECX
Update constr regex example to include start and end lines, #1396 by @lmcnearney
Confirm that shallow model.copy() does make a shallow copy of attributes, #1383 by @samuelcolvin
Renaming model_name argument of main.create_model() to __model_name to allow using model_name as a field name, #1367 by @kittipatv
Replace raising of exception to silent passing for non-Var attributes in mypy plugin, #1345 by @b0g3r
Remove typing_extensions dependency for Python 3.8, #1342 by @prettywood
Make SecretStr and SecretBytes initialization idempotent, #1330 by @atheuz
document making secret types dumpable using the json method, #1328 by @atheuz
Move all testing and build to github actions, add windows and macos binaries, thank you @StephenBrown2 for much help, #1326 by @samuelcolvin
fix card number length check in PaymentCardNumber, PaymentCardBrand now inherits from str, #1317 by @samuelcolvin
Have BaseModel inherit from Representation to make mypy happy when overriding __str__, #1310 by @FuegoFro
Allow None as input to all optional list fields, #1307 by @prettywood
Add datetime field to default_factory example, #1301 by @StephenBrown2
Allow subclasses of known types to be encoded with superclass encoder, #1291 by @StephenBrown2
Exclude exported fields from all elements of a list/tuple of submodels/dicts with '__all__', #1286 by @masalim2
Add pydantic.color.Color objects as available input for Color fields, #1258 by @leosussan
In examples, type nullable fields as Optional, so that these are valid mypy annotations, #1248 by @kokes
Make pattern_validator() accept pre-compiled Pattern objects. Fix str_validator() return type to str, #1237 by @adamgreg
Document how to manage Generics and inheritance, #1229 by @esadruhn
update_forward_refs() method of BaseModel now copies __dict__ of class module instead of modyfying it, #1228 by @paul-ilyin
Support instance methods and class methods with @validate_arguments, #1222 by @samuelcolvin
Add default_factory argument to Field to create a dynamic default value by passing a zero-argument callable, #1210 by @prettywood
add support for NewType of List, Optional, etc, #1207 by @Kazy
fix mypy signature for root_validator, #1192 by @samuelcolvin
Fixed parsing of nested 'custom root type' models, #1190 by @Shados
Add validate_arguments function decorator which checks the arguments to a function matches type annotations, #1179 by @samuelcolvin
Add __signature__ to models, #1034 by @Bobronium
Refactor ._iter() method, 10x speed boost for dict(model), #1017 by @Bobronium

v1.4 (2020-01-24)

Breaking Change: alias precedence logic changed so aliases on a field always take priority over an alias from alias_generator to avoid buggy/unexpected behaviour, see here for details, #1178 by @samuelcolvin
Add support for unicode and punycode in TLDs, #1182 by @jamescurtin
Fix cls argument in validators during assignment, #1172 by @samuelcolvin
completing Luhn algorithm for PaymentCardNumber, #1166 by @cuencandres
add support for generics that implement __get_validators__ like a custom data type, #1159 by @tiangolo
add support for infinite generators with Iterable, #1152 by @tiangolo
fix url_regex to accept schemas with +, - and . after the first character, #1142 by @samuelcolvin
move version_info() to version.py, suggest its use in issues, #1138 by @samuelcolvin
Improve pydantic import time by roughly 50% by deferring some module loading and regex compilation, #1127 by @samuelcolvin
Fix EmailStr and NameEmail to accept instances of themselves in cython, #1126 by @koxudaxi
Pass model class to the Config.schema_extra callable, #1125 by @therefromhere
Fix regex for username and password in URLs, #1115 by @samuelcolvin
Add support for nested generic models, #1104 by @dmontagu
add __all__ to __init__.py to prevent "implicit reexport" errors from mypy, #1072 by @samuelcolvin
Add support for using "dotenv" files with BaseSettings, #1011 by @acnebs

v1.3 (2019-12-21)

Change schema and schema_model to handle dataclasses by using their __pydantic_model__ feature, #792 by @aviramha
Added option for root_validator to be skipped if values validation fails using keyword skip_on_failure=True, #1049 by @aviramha
Allow Config.schema_extra to be a callable so that the generated schema can be post-processed, #1054 by @selimb
Update mypy to version 0.750, #1057 by @dmontagu
Trick Cython into allowing str subclassing, #1061 by @skewty
Prevent type attributes being added to schema unless the attribute __schema_attributes__ is True, #1064 by @samuelcolvin
Change BaseModel.parse_file to use Config.json_loads, #1067 by @kierandarcy
Fix for optional Json fields, #1073 by @volker48
Change the default number of threads used when compiling with cython to one, allow override via the CYTHON_NTHREADS environment variable, #1074 by @samuelcolvin
Run FastAPI tests during Pydantic's CI tests, #1075 by @tiangolo
My mypy strictness constraints, and associated tweaks to type annotations, #1077 by @samuelcolvin
Add __eq__ to SecretStr and SecretBytes to allow "value equals", #1079 by @sbv-trueenergy
Fix schema generation for nested None case, #1088 by @lutostag
Consistent checks for sequence like objects, #1090 by @samuelcolvin
Fix Config inheritance on BaseSettings when used with env_prefix, #1091 by @samuelcolvin
Fix for __modify_schema__ when it conflicted with field_class_to_schema*, #1102 by @samuelcolvin
docs: Fix explanation of case sensitive environment variable names when populating BaseSettings subclass attributes, #1105 by @tribals
Rename django-rest-framework benchmark in documentation, #1119 by @frankie567

v1.2 (2019-11-28)

Possible Breaking Change: Add support for required Optional with name: Optional[AnyType] = Field(...) and refactor ModelField creation to preserve required parameter value, #1031 by @tiangolo; see here for details
Add benchmarks for cattrs, #513 by @sebastianmika
Add exclude_none option to dict() and friends, #587 by @niknetniko
Add benchmarks for valideer, #670 by @gsakkis
Add parse_obj_as and parse_file_as functions for ad-hoc parsing of data into arbitrary pydantic-compatible types, #934 by @dmontagu
Add allow_reuse argument to validators, thus allowing validator reuse, #940 by @dmontagu
Add support for mapping types for custom root models, #958 by @dmontagu
Mypy plugin support for dataclasses, #966 by @koxudaxi
Add support for dataclasses default factory, #968 by @ahirner
Add a ByteSize type for converting byte string (1GB) to plain bytes, #977 by @dgasmith
Fix mypy complaint about @root_validator(pre=True), #984 by @samuelcolvin
Add manylinux binaries for Python 3.8 to pypi, also support manylinux2010, #994 by @samuelcolvin
Adds ByteSize conversion to another unit, #995 by @dgasmith
Fix __str__ and __repr__ inheritance for models, #1022 by @samuelcolvin
add testimonials section to docs, #1025 by @sullivancolin
Add support for typing.Literal for Python 3.8, #1026 by @dmontagu

v1.1.1 (2019-11-20)

Fix bug where use of complex fields on sub-models could cause fields to be incorrectly configured, #1015 by @samuelcolvin

v1.1 (2019-11-07)

Add a mypy plugin for type checking BaseModel.__init__ and more, #722 by @dmontagu
Change return type typehint for GenericModel.__class_getitem__ to prevent PyCharm warnings, #936 by @dmontagu
Fix usage of Any to allow None, also support TypeVar thus allowing use of un-parameterised collection types e.g. Dict and List, #962 by @samuelcolvin
Set FieldInfo on subfields to fix schema generation for complex nested types, #965 by @samuelcolvin

v1.0 (2019-10-23)

Breaking Change: deprecate the Model.fields property, use Model.__fields__ instead, #883 by @samuelcolvin
Breaking Change: Change the precedence of aliases so child model aliases override parent aliases, including using alias_generator, #904 by @samuelcolvin
Breaking change: Rename skip_defaults to exclude_unset, and add ability to exclude actual defaults, #915 by @dmontagu
Add **kwargs to pydantic.main.ModelMetaclass.__new__ so __init_subclass__ can take custom parameters on extended BaseModel classes, #867 by @retnikt
Fix field of a type that has a default value, #880 by @koxudaxi
Use FutureWarning instead of DeprecationWarning when alias instead of env is used for settings models, #881 by @samuelcolvin
Fix issue with BaseSettings inheritance and alias getting set to None, #882 by @samuelcolvin
Modify __repr__ and __str__ methods to be consistent across all public classes, add __pretty__ to support python-devtools, #884 by @samuelcolvin
deprecation warning for case_insensitive on BaseSettings config, #885 by @samuelcolvin
For BaseSettings merge environment variables and in-code values recursively, as long as they create a valid object when merged together, to allow splitting init arguments, #888 by @idmitrievsky
change secret types example, #890 by @ashears
Change the signature of Model.construct() to be more user-friendly, document construct() usage, #898 by @samuelcolvin
Add example for the construct() method, #907 by @ashears
Improve use of Field constraints on complex types, raise an error if constraints are not enforceable, also support tuples with an ellipsis Tuple[X, ...], Sequence and FrozenSet in schema, #909 by @samuelcolvin
update docs for bool missing valid value, #911 by @trim21
Better str/repr logic for ModelField, #912 by @samuelcolvin
Fix ConstrainedList, update schema generation to reflect min_items and max_items Field() arguments, #917 by @samuelcolvin
Allow abstracts sets (eg. dict keys) in the include and exclude arguments of dict(), #921 by @samuelcolvin
Fix JSON serialization errors on ValidationError.json() by using pydantic_encoder, #922 by @samuelcolvin
Clarify usage of remove_untouched, improve error message for types with no validators, #926 by @retnikt

v1.0b2 (2019-10-07)

Mark StrictBool typecheck as bool to allow for default values without mypy errors, #690 by @dmontagu
Transfer the documentation build from sphinx to mkdocs, re-write much of the documentation, #856 by @samuelcolvin
Add support for custom naming schemes for GenericModel subclasses, #859 by @dmontagu
Add if TYPE_CHECKING: to the excluded lines for test coverage, #874 by @dmontagu
Rename allow_population_by_alias to allow_population_by_field_name, remove unnecessary warning about it, #875 by @samuelcolvin

v1.0b1 (2019-10-01)

Breaking Change: rename Schema to Field, make it a function to placate mypy, #577 by @samuelcolvin
Breaking Change: modify parsing behavior for bool, #617 by @dmontagu
Breaking Change: get_validators is no longer recognised, use __get_validators__. Config.ignore_extra and Config.allow_extra are no longer recognised, use Config.extra, #720 by @samuelcolvin
Breaking Change: modify default config settings for BaseSettings; case_insensitive renamed to case_sensitive, default changed to case_sensitive = False, env_prefix default changed to '' - e.g. no prefix, #721 by @dmontagu
Breaking change: Implement root_validator and rename root errors from __obj__ to __root__, #729 by @samuelcolvin
Breaking Change: alter the behaviour of dict(model) so that sub-models are nolonger converted to dictionaries, #733 by @samuelcolvin
Breaking change: Added initvars support to post_init_post_parse, #748 by @Raphael-C-Almeida
Breaking Change: Make BaseModel.json() only serialize the __root__ key for models with custom root, #752 by @dmontagu
Breaking Change: complete rewrite of URL parsing logic, #755 by @samuelcolvin
Breaking Change: preserve superclass annotations for field-determination when not provided in subclass, #757 by @dmontagu
Breaking Change: BaseSettings now uses the special env settings to define which environment variables to read, not aliases, #847 by @samuelcolvin
add support for assert statements inside validators, #653 by @abdusco
Update documentation to specify the use of pydantic.dataclasses.dataclass and subclassing pydantic.BaseModel, #710 by @maddosaurus
Allow custom JSON decoding and encoding via json_loads and json_dumps Config properties, #714 by @samuelcolvin
make all annotated fields occur in the order declared, #715 by @dmontagu
use pytest to test mypy integration, #735 by @dmontagu
add __repr__ method to ErrorWrapper, #738 by @samuelcolvin
Added support for FrozenSet members in dataclasses, and a better error when attempting to use types from the typing module that are not supported by Pydantic, #745 by @djpetti
add documentation for Pycharm Plugin, #750 by @koxudaxi
fix broken examples in the docs, #753 by @dmontagu
moving typing related objects into pydantic.typing, #761 by @samuelcolvin
Minor performance improvements to ErrorWrapper, ValidationError and datetime parsing, #763 by @samuelcolvin
Improvements to datetime/date/time/timedelta types: more descriptive errors, change errors to value_error not type_error, support bytes, #766 by @samuelcolvin
fix error messages for Literal types with multiple allowed values, #770 by @dmontagu
Improved auto-generated title field in JSON schema by converting underscore to space, #772 by @skewty
support mypy --no-implicit-reexport for dataclasses, also respect --no-implicit-reexport in pydantic itself, #783 by @samuelcolvin
add the PaymentCardNumber type, #790 by @matin
Fix const validations for lists, #794 by @hmvp
Set additionalProperties to false in schema for models with extra fields disallowed, #796 by @Code0x58
EmailStr validation method now returns local part case-sensitive per RFC 5321, #798 by @henriklindgren
Added ability to validate strictness to ConstrainedFloat, ConstrainedInt and ConstrainedStr and added StrictFloat and StrictInt classes, #799 by @DerRidda
Improve handling of None and Optional, replace whole with each_item (inverse meaning, default False) on validators, #803 by @samuelcolvin
add support for Type[T] type hints, #807 by @timonbimon
Performance improvements from removing change_exceptions, change how pydantic error are constructed, #819 by @samuelcolvin
Fix the error message arising when a BaseModel-type model field causes a ValidationError during parsing, #820 by @dmontagu
allow getter_dict on Config, modify GetterDict to be more like a Mapping object and thus easier to work with, #821 by @samuelcolvin
Only check TypeVar param on base GenericModel class, #842 by @zpencerq
rename Model._schema_cache -> Model.__schema_cache__, Model._json_encoder -> Model.__json_encoder__, Model._custom_root_type -> Model.__custom_root_type__, #851 by @samuelcolvin

v0.32.2 (2019-08-17)

(Docs are available here)

fix __post_init__ usage with dataclass inheritance, fix #739 by @samuelcolvin
fix required fields validation on GenericModels classes, #742 by @amitbl
fix defining custom Schema on GenericModel fields, #754 by @amitbl

v0.32.1 (2019-08-08)

do not validate extra fields when validate_assignment is on, #724 by @YaraslauZhylko

v0.32 (2019-08-06)

add model name to ValidationError error message, #676 by @dmontagu
breaking change: remove __getattr__ and rename __values__ to __dict__ on BaseModel, deprecation warning on use __values__ attr, attributes access speed increased up to 14 times, #712 by @Bobronium
support ForwardRef (without self-referencing annotations) in Python 3.6, #706 by @koxudaxi
implement schema_extra in Config sub-class, #663 by @tiangolo

v0.31.1 (2019-07-31)

fix json generation for EnumError, #697 by @dmontagu
update numerous dependencies

v0.31 (2019-07-24)

better support for floating point multiple_of values, #652 by @justindujardin
fix schema generation for NewType and Literal, #649 by @dmontagu
fix alias_generator and field config conflict, #645 by @gmetzker and #658 by @Bobronium
more detailed message for EnumError, #673 by @dmontagu
add advanced exclude support for dict, json and copy, #648 by @Bobronium
fix bug in GenericModel for models with concrete parameterized fields, #672 by @dmontagu
add documentation for Literal type, #651 by @dmontagu
add Config.keep_untouched for custom descriptors support, #679 by @Bobronium
use inspect.cleandoc internally to get model description, #657 by @tiangolo
add Color to schema generation, by @euri10
add documentation for Literal type, #651 by @dmontagu

v0.30.1 (2019-07-15)

fix so nested classes which inherit and change __init__ are correctly processed while still allowing self as a parameter, #644 by @lnaden and @dgasmith

v0.30 (2019-07-07)

enforce single quotes in code, #612 by @samuelcolvin
fix infinite recursion with dataclass inheritance and __post_init__, #606 by @Hanaasagi
fix default values for GenericModel, #610 by @dmontagu
clarify that self-referencing models require Python 3.7+, #616 by @vlcinsky
fix truncate for types, #611 by @dmontagu
add alias_generator support, #622 by @Bobronium
fix unparameterized generic type schema generation, #625 by @dmontagu
fix schema generation with multiple/circular references to the same model, #621 by @tiangolo and @wongpat
support custom root types, #628 by @koxudaxi
support self as a field name in parse_obj, #632 by @samuelcolvin

v0.29 (2019-06-19)

support dataclasses.InitVar, #592 by @pfrederiks
Updated documentation to elucidate the usage of Union when defining multiple types under an attribute's annotation and showcase how the type-order can affect marshalling of provided values, #594 by @somada141
add conlist type, #583 by @hmvp
add support for generics, #595 by @dmontagu

v0.28 (2019-06-06)

fix support for JSON Schema generation when using models with circular references in Python 3.7, #572 by @tiangolo
support __post_init_post_parse__ on dataclasses, #567 by @sevaho
allow dumping dataclasses to JSON, #575 by @samuelcolvin and @DanielOberg
ORM mode, #562 by @samuelcolvin
fix pydantic.compiled on ipython, #573 by @dmontagu and @samuelcolvin
add StrictBool type, #579 by @cazgp

v0.27 (2019-05-30)

breaking change _pydantic_post_init to execute dataclass' original __post_init__ before validation, #560 by @HeavenVolkoff
fix handling of generic types without specified parameters, #550 by @dmontagu
breaking change (maybe): this is the first release compiled with cython, see the docs and please submit an issue if you run into problems

v0.27.0a1 (2019-05-26)

fix JSON Schema for list, tuple, and set, #540 by @tiangolo
compiling with cython, manylinux binaries, some other performance improvements, #548 by @samuelcolvin

v0.26 (2019-05-22)

fix to schema generation for IPvAnyAddress, IPvAnyInterface, IPvAnyNetwork #498 by @pilosus
fix variable length tuples support, #495 by @pilosus
fix return type hint for create_model, #526 by @dmontagu
Breaking Change: fix .dict(skip_keys=True) skipping values set via alias (this involves changing validate_model() to always returns Tuple[Dict[str, Any], Set[str], Optional[ValidationError]]), #517 by @sommd
fix to schema generation for IPv4Address, IPv6Address, IPv4Interface, IPv6Interface, IPv4Network, IPv6Network #532 by @euri10
add Color type, #504 by @pilosus and @samuelcolvin

v0.25 (2019-05-05)

Improve documentation on self-referencing models and annotations, #487 by @theenglishway
fix .dict() with extra keys, #490 by @JaewonKim
support const keyword in Schema, #434 by @Sean1708

v0.24 (2019-04-23)

fix handling ForwardRef in sub-types, like Union, #464 by @tiangolo
fix secret serialization, #465 by @atheuz
Support custom validators for dataclasses, #454 by @primal100
fix parse_obj to cope with dict-like objects, #472 by @samuelcolvin
fix to schema generation in nested dataclass-based models, #474 by @NoAnyLove
fix json for Path, FilePath, and DirectoryPath objects, #473 by @mikegoodspeed

v0.23 (2019-04-04)

improve documentation for contributing section, #441 by @pilosus
improve README.rst to include essential information about the package, #446 by @pilosus
IntEnum support, #444 by @potykion
fix PyObject callable value, #409 by @pilosus
fix black deprecation warnings after update, #451 by @pilosus
fix ForwardRef collection bug, #450 by @tigerwings
Support specialized ClassVars, #455 by @tyrylu
fix JSON serialization for ipaddress types, #333 by @pilosus
add SecretStr and SecretBytes types, #452 by @atheuz

v0.22 (2019-03-29)

add IPv{4,6,Any}Network and IPv{4,6,Any}Interface types from ipaddress stdlib, #333 by @pilosus
add docs for datetime types, #386 by @pilosus
fix to schema generation in dataclass-based models, #408 by @pilosus
fix path in nested models, #437 by @kataev
add Sequence support, #304 by @pilosus

v0.21.0 (2019-03-15)

fix typo in NoneIsNotAllowedError message, #414 by @YaraslauZhylko
add IPvAnyAddress, IPv4Address and IPv6Address types, #333 by @pilosus

v0.20.1 (2019-02-26)

fix type hints of parse_obj and similar methods, #405 by @erosennin
fix submodel validation, #403 by @samuelcolvin
correct type hints for ValidationError.json, #406 by @layday

v0.20.0 (2019-02-18)

fix tests for Python 3.8, #396 by @samuelcolvin
Adds fields to the dir method for autocompletion in interactive sessions, #398 by @dgasmith
support ForwardRef (and therefore from __future__ import annotations) with dataclasses, #397 by @samuelcolvin

v0.20.0a1 (2019-02-13)

breaking change (maybe): more sophisticated argument parsing for validators, any subset of values, config and field is now permitted, eg. (cls, value, field), however the variadic key word argument ("**kwargs") must be called kwargs, #388 by @samuelcolvin
breaking change: Adds skip_defaults argument to BaseModel.dict() to allow skipping of fields that were not explicitly set, signature of Model.construct() changed, #389 by @dgasmith
add py.typed marker file for PEP-561 support, #391 by @je-l
Fix extra behaviour for multiple inheritance/mix-ins, #394 by @YaraslauZhylko

v0.19.0 (2019-02-04)

Support Callable type hint, fix #279 by @proofit404
Fix schema for fields with validator decorator, fix #375 by @tiangolo
Add multiple_of constraint to ConstrainedDecimal, ConstrainedFloat, ConstrainedInt and their related types condecimal, confloat, and conint #371, thanks @StephenBrown2
Deprecated ignore_extra and allow_extra Config fields in favor of extra, #352 by @liiight
Add type annotations to all functions, test fully with mypy, #373 by @samuelcolvin
fix for 'missing' error with validate_all or validate_always, #381 by @samuelcolvin
Change the second/millisecond watershed for date/datetime parsing to 2e10, #385 by @samuelcolvin

v0.18.2 (2019-01-22)

Fix to schema generation with Optional fields, fix #361 by @samuelcolvin

v0.18.1 (2019-01-17)

add ConstrainedBytes and conbytes types, #315 @Gr1N
adding MANIFEST.in to include license in package .tar.gz, #358 by @samuelcolvin

v0.18.0 (2019-01-13)

breaking change: don't call validators on keys of dictionaries, #254 by @samuelcolvin
Fix validators with always=True when the default is None or the type is optional, also prevent whole validators being called for sub-fields, fix #132 by @samuelcolvin
improve documentation for settings priority and allow it to be easily changed, #343 by @samuelcolvin
fix ignore_extra=False and allow_population_by_alias=True, fix #257 by @samuelcolvin
breaking change: Set BaseConfig attributes min_anystr_length and max_anystr_length to None by default, fix #349 in #350 by @tiangolo
add support for postponed annotations, #348 by @samuelcolvin

v0.17.0 (2018-12-27)

fix schema for timedelta as number, #325 by @tiangolo
prevent validators being called repeatedly after inheritance, #327 by @samuelcolvin
prevent duplicate validator check in ipython, fix #312 by @samuelcolvin
add "Using Pydantic" section to docs, #323 by @tiangolo & #326 by @samuelcolvin
fix schema generation for fields annotated as : dict, : list, : tuple and : set, #330 & #335 by @nkonin
add support for constrained strings as dict keys in schema, #332 by @tiangolo
support for passing Config class in dataclasses decorator, #276 by @jarekkar (breaking change: this supersedes the validate_assignment argument with config)
support for nested dataclasses, #334 by @samuelcolvin
better errors when getting an ImportError with PyObject, #309 by @samuelcolvin
rename get_validators to __get_validators__, deprecation warning on use of old name, #338 by @samuelcolvin
support ClassVar by excluding such attributes from fields, #184 by @samuelcolvin

v0.16.1 (2018-12-10)

fix create_model to correctly use the passed __config__, #320 by @hugoduncan

v0.16.0 (2018-12-03)

breaking change: refactor schema generation to be compatible with JSON Schema and OpenAPI specs, #308 by @tiangolo
add schema to schema module to generate top-level schemas from base models, #308 by @tiangolo
add additional fields to Schema class to declare validation for str and numeric values, #311 by @tiangolo
rename _schema to schema on fields, #318 by @samuelcolvin
add case_insensitive option to BaseSettings Config, #277 by @jasonkuhrt

v0.15.0 (2018-11-18)

move codebase to use black, #287 by @samuelcolvin
fix alias use in settings, #286 by @jasonkuhrt and @samuelcolvin
fix datetime parsing in parse_date, #298 by @samuelcolvin
allow dataclass inheritance, fix #293 by @samuelcolvin
fix PyObject = None, fix #305 by @samuelcolvin
allow Pattern type, fix #303 by @samuelcolvin

v0.14.0 (2018-10-02)

dataclasses decorator, #269 by @Gaunt and @samuelcolvin

v0.13.1 (2018-09-21)

fix issue where int_validator doesn't cast a bool to an int #264 by @nphyatt
add deep copy support for BaseModel.copy() #249, @gangefors

v0.13.0 (2018-08-25)

raise an exception if a field's name shadows an existing BaseModel attribute #242
add UrlStr and urlstr types #236
timedelta json encoding ISO8601 and total seconds, custom json encoders #247, by @cfkanesan and @samuelcolvin
allow timedelta objects as values for properties of type timedelta (matches datetime etc. behavior) #247

v0.12.1 (2018-07-31)

fix schema generation for fields defined using typing.Any #237

v0.12.0 (2018-07-31)

add by_alias argument in .dict() and .json() model methods #205
add Json type support #214
support tuples #227
major improvements and changes to schema #213

v0.11.2 (2018-07-05)

add NewType support #115
fix list, set & tuple validation #225
separate out validate_model method, allow errors to be returned along with valid values #221

v0.11.1 (2018-07-02)

support Python 3.7 #216, thanks @layday
Allow arbitrary types in model #209, thanks @oldPadavan

v0.11.0 (2018-06-28)

make list, tuple and set types stricter #86
breaking change: remove msgpack parsing #201
add FilePath and DirectoryPath types #10
model schema generation #190
JSON serialization of models and schemas #133

v0.10.0 (2018-06-11)

add Config.allow_population_by_alias #160, thanks @bendemaree
breaking change: new errors format #179, thanks @Gr1N
breaking change: removed Config.min_number_size and Config.max_number_size #183, thanks @Gr1N
breaking change: correct behaviour of lt and gt arguments to conint etc. #188 for the old behaviour use le and ge #194, thanks @jaheba
added error context and ability to redefine error message templates using Config.error_msg_templates #183, thanks @Gr1N
fix typo in validator exception #150
copy defaults to model values, so different models don't share objects #154

v0.9.1 (2018-05-10)

allow custom get_field_config on config classes #159
add UUID1, UUID3, UUID4 and UUID5 types #167, thanks @Gr1N
modify some inconsistent docstrings and annotations #173, thanks @YannLuo
fix type annotations for exotic types #171, thanks @Gr1N
re-use type validators in exotic types #171
scheduled monthly requirements updates #168
add Decimal, ConstrainedDecimal and condecimal types #170, thanks @Gr1N

v0.9.0 (2018-04-28)

tweak email-validator import error message #145
fix parse error of parse_date() and parse_datetime() when input is 0 #144, thanks @YannLuo
add Config.anystr_strip_whitespace and strip_whitespace kwarg to constr, by default values is False #163, thanks @Gr1N
add ConstrainedFloat, confloat, PositiveFloat and NegativeFloat types #166, thanks @Gr1N

v0.8.0 (2018-03-25)

fix type annotation for inherit_config #139
breaking change: check for invalid field names in validators #140
validate attributes of parent models #141
breaking change: email validation now uses email-validator #142

v0.7.1 (2018-02-07)

fix bug with create_model modifying the base class

v0.7.0 (2018-02-06)

added compatibility with abstract base classes (ABCs) #123
add create_model method #113 #125
breaking change: rename .config to .__config__ on a model
breaking change: remove deprecated .values() on a model, use .dict() instead
remove use of OrderedDict and use simple dict #126
add Config.use_enum_values #127
add wildcard validators of the form @validate('*') #128

v0.6.4 (2018-02-01)

allow Python date and times objects #122

v0.6.3 (2017-11-26)

fix direct install without README.rst present

v0.6.2 (2017-11-13)

errors for invalid validator use
safer check for complex models in Settings

v0.6.1 (2017-11-08)

prevent duplicate validators, #101
add always kwarg to validators, #102

v0.6.0 (2017-11-07)

assignment validation #94, thanks petroswork!
JSON in environment variables for complex types, #96
add validator decorators for complex validation, #97
depreciate values(...) and replace with .dict(...), #99

v0.5.0 (2017-10-23)

add UUID validation #89
remove index and track from error object (json) if they're null #90
improve the error text when a list is provided rather than a dict #90
add benchmarks table to docs #91

v0.4.0 (2017-07-08)

show length in string validation error
fix aliases in config during inheritance #55
simplify error display
use unicode ellipsis in truncate
add parse_obj, parse_raw and parse_file helper functions #58
switch annotation only fields to come first in fields list not last

v0.3.0 (2017-06-21)

immutable models via config.allow_mutation = False, associated cleanup and performance improvement #44
immutable helper methods construct() and copy() #53
allow pickling of models #53
setattr is removed as __setattr__ is now intelligent #44
raise_exception removed, Models now always raise exceptions #44
instance method validators removed
django-restful-framework benchmarks added #47
fix inheritance bug #49
make str type stricter so list, dict etc are not coerced to strings. #52
add StrictStr which only always strings as input #52

v0.2.1 (2017-06-07)

pypi and travis together messed up the deploy of v0.2 this should fix it

v0.2.0 (2017-06-07)

breaking change: values() on a model is now a method not a property, takes include and exclude arguments
allow annotation only fields to support mypy
add pretty to_string(pretty=True) method for models

v0.1.0 (2017-06-03)

add docs
add history

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