5.0 - No time zone found with key Pacific/Kanto

[M3te0r]

Hi, I just upgraded to django-timezone-field 5.0 and have the migrations failing on DB + Tables creation
Django : 4.0.2
Python : 3.10.0
Using official 3.10-slim-bullseye docker image
Model code :

class UserProfile(Model):

    user = OneToOneField(
        User,
        on_delete=CASCADE,
        related_name="profile",
        verbose_name=_("Utilisateur"),
    )
    timezone = TimeZoneField(
        _("Fuseau horaire"),
        default="Europe/Paris",
        choices_display="WITH_GMT_OFFSET",
    )

Traceback :

Traceback (most recent call last):
  File "/usr/local/lib/python3.10/zoneinfo/_common.py", line 12, in load_tzdata
    return importlib.resources.open_binary(package_name, resource_name)
  File "/usr/local/lib/python3.10/importlib/resources.py", line 43, in open_binary
    package = _common.get_package(package)
  File "/usr/local/lib/python3.10/importlib/_common.py", line 66, in get_package
    resolved = resolve(package)
  File "/usr/local/lib/python3.10/importlib/_common.py", line 57, in resolve
    return cand if isinstance(cand, types.ModuleType) else importlib.import_module(cand)
  File "/usr/local/lib/python3.10/importlib/__init__.py", line 126, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1050, in _gcd_import
  File "<frozen importlib._bootstrap>", line 1027, in _find_and_load
  File "<frozen importlib._bootstrap>", line 992, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 241, in _call_with_frames_removed
  File "<frozen importlib._bootstrap>", line 1050, in _gcd_import
  File "<frozen importlib._bootstrap>", line 1027, in _find_and_load
  File "<frozen importlib._bootstrap>", line 992, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 241, in _call_with_frames_removed
  File "<frozen importlib._bootstrap>", line 1050, in _gcd_import
  File "<frozen importlib._bootstrap>", line 1027, in _find_and_load
  File "<frozen importlib._bootstrap>", line 1004, in _find_and_load_unlocked
ModuleNotFoundError: No module named 'tzdata'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/opt/app/manage.py", line 31, in <module>
    execute_from_command_line(sys.argv)
  File "/opt/venv/lib/python3.10/site-packages/django/core/management/__init__.py", line 425, in execute_from_command_line
    utility.execute()
  File "/opt/venv/lib/python3.10/site-packages/django/core/management/__init__.py", line 401, in execute
    django.setup()
  File "/opt/venv/lib/python3.10/site-packages/django/__init__.py", line 24, in setup
    apps.populate(settings.INSTALLED_APPS)
  File "/opt/venv/lib/python3.10/site-packages/django/apps/registry.py", line 114, in populate
    app_config.import_models()
  File "/opt/venv/lib/python3.10/site-packages/django/apps/config.py", line 300, in import_models
    self.models_module = import_module(models_module_name)
  File "/usr/local/lib/python3.10/importlib/__init__.py", line 126, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1050, in _gcd_import
  File "<frozen importlib._bootstrap>", line 1027, in _find_and_load
  File "<frozen importlib._bootstrap>", line 1006, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 688, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 883, in exec_module
  File "<frozen importlib._bootstrap>", line 241, in _call_with_frames_removed
  File "/opt/app/nova/users/models.py", line 19, in <module>
    from timezone_field import TimeZoneField
  File "/opt/venv/lib/python3.10/site-packages/timezone_field/__init__.py", line 1, in <module>
    from timezone_field.fields import TimeZoneField
  File "/opt/venv/lib/python3.10/site-packages/timezone_field/fields.py", line 11, in <module>
    class TimeZoneField(models.Field):
  File "/opt/venv/lib/python3.10/site-packages/timezone_field/fields.py", line 41, in TimeZoneField
    default_zoneinfo_tzs = [ZoneInfo(tz) for tz in pytz.common_timezones]
  File "/opt/venv/lib/python3.10/site-packages/timezone_field/fields.py", line 41, in <listcomp>
    default_zoneinfo_tzs = [ZoneInfo(tz) for tz in pytz.common_timezones]
  File "/usr/local/lib/python3.10/zoneinfo/_common.py", line 24, in load_tzdata
    raise ZoneInfoNotFoundError(f"No time zone found with key {key}")
zoneinfo._common.ZoneInfoNotFoundError: 'No time zone found with key Pacific/Kanton'

[M3te0r]

From python zone info doc
https://docs.python.org/3/library/zoneinfo.html

The zoneinfo module provides a concrete time zone implementation to support the IANA time zone database as originally specified in PEP 615. By default, zoneinfo uses the system’s time zone data if available; if no system time zone data is available, the library will fall back to using the first-party tzdata package available on PyPI.

I had to explicitly add tzdata to my project dependencies, closing the issue

[squio]

Had the exact same issue:

• Django 4.0.2
• Python 3.10.2
• error: No time zone found with key Pacific/Kanton

And pip install tzdata did work

Maybe add this to documentation in upgrade instructions?

[mfogel]

Thanks for reporting this. I'll push an update to the README mentioning this today

…

On Wed, Feb 9, 2022, 4:45 AM Johannes la Poutre ***@***.***> wrote: Had the exact same issue: - Django 4.0.2 - Python 3.10.2 - error: No time zone found with key Pacific/Kanton And pip install tzdata did work Maybe ad this to documentation? — Reply to this email directly, view it on GitHub <#82 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAARCDSVZWJOQONWRAYTREDU2JOXHANCNFSM5N5A5NSA> . You are receiving this because you are subscribed to this thread.Message ID: ***@***.***>

[sshishov]

Got the same issue, I guess you should add this dependency as an optional like django-timezone-field[tzdata] or similar. SO thread here