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add in-place reloading in docs (#316)
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nrolin authored Jun 18, 2024
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Expand Up @@ -1514,3 +1514,39 @@ except ValidationError as exc_info:
For further information visit https://errors.pydantic.dev/2/v/missing
"""
```


## In-place reloading

In case you want to reload in-place an existing setting, you can do it by using its `__init__` method :

```py
import os

from pydantic import Field

from pydantic_settings import BaseSettings


class Settings(BaseSettings):
foo: str = Field('foo')


mutable_settings = Settings()

print(mutable_settings.foo)
#> foo

os.environ['foo'] = 'bar'
print(mutable_settings.foo)
#> foo

mutable_settings.__init__()
print(mutable_settings.foo)
#> bar

os.environ.pop('foo')
mutable_settings.__init__()
print(mutable_settings.foo)
#> foo
```

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