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Stop using datetime.utcnow() in tests #1308

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s-t-e-v-e-n-k
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@s-t-e-v-e-n-k s-t-e-v-e-n-k commented Jan 31, 2024

datetime.utcnow() is deprecated for Python 3.12+, and raises a warning. Since warnings are treated as errors, this results in test failures. Since utcnow calls are done by the SQLAlchemy mapping machinery, we need to use a callable.

Fixes #1303

Checklist:

  • Add tests that demonstrate the correct behavior of the change. Tests should fail without the change.
  • Add or update relevant docs, in the docs folder and in code.
  • Add an entry in CHANGES.rst summarizing the change and linking to the issue.
  • Add .. versionchanged:: entries in any relevant code docs.
  • Run pre-commit hooks and fix any issues.
  • Run pytest and tox, no tests failed.

@s-t-e-v-e-n-k s-t-e-v-e-n-k force-pushed the stop-using-utcnow branch 2 times, most recently from 90d6e72 to 172e239 Compare January 31, 2024 05:55
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Thanks! As this is a bug fix, could you make it off the latest 3.x branch, per https://github.com/pallets-eco/flask-sqlalchemy/blob/main/CONTRIBUTING.rst#start-coding ?

@@ -14,6 +15,11 @@
from flask_sqlalchemy.model import Model


class UTCNow(datetime):
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Rather than making this a subclass with a tricky __new__, this should just be a function:

def now() -> datetime:
    return datetime.now(timezone.utc)

@s-t-e-v-e-n-k
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I have addressed both comments, thanks!

CHANGES.rst Outdated Show resolved Hide resolved
datetime.utcnow() is deprecated for Python 3.12+, and raises a warning.
Since warnings are treated as errors, this results in test failures.
Since utcnow calls are done by the SQLAlchemy mapping machinery, we need
to use a function.

Fixes pallets-eco#1303
@s-t-e-v-e-n-k
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@davidism Thanks, I've reverted that bit.

@davidism
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Sorry, completely forgot about this PR and ended up fixing it myself when doing some updates. Thanks for working on it!

@davidism davidism closed this Apr 25, 2024
@github-actions github-actions bot locked as resolved and limited conversation to collaborators May 10, 2024
@s-t-e-v-e-n-k s-t-e-v-e-n-k deleted the stop-using-utcnow branch October 30, 2024 00:49
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Python 3.12 changes cause test failures due to deprecation warning
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