chango.git/tests/model_fields/tests.py, branch devmain

Fixed #35870 -- Made blank choice label in forms more accessible.

2026-04-22T21:06:29Z

Added new constant django.db.models.fields.BLANK_CHOICE_LABEL for an accessible and translatable blank choice label in forms. Deprecated django.db.models.fields.BLANK_CHOICE_DASH constant. Added the immediately deprecated transitional setting USE_BLANK_CHOICE_DASH. Co-Authored-By: Marijke Luttekes

Fixed #36727 -- Deprecated Field.get_placeholder in favor of get_placeholder_sql.

2026-03-13T00:01:02Z

The lack of ability of the get_placeholder call chain to return SQL and parameters separated so they can be mogrified by the backend at execution time forced implementations to dangerously interpolate potentially user controlled values. The get_placeholder_sql name was chosen due to its proximity to the previous method, but other options such as Field.as_sql were considered but ultimately rejected due to its different input signature compared to Expression.as_sql that might have lead to confusion. There is a lot of overlap between what Field.get_db_prep_value and get_placeholder_sql do but folding the latter in the former would require changing its return signature to return expression which is a way more invasive change than what is proposed here. Given we always call get_db_prep_value it might still be an avenue worth exploring in the future to offer a publicly documented interface to allow field to take an active part in the compilation chain. Thanks Jacob for the review.

Fixed #35766 -- Handled slices in BaseChoiceIterator.

2024-09-18T14:45:53Z

Fixed #24561 -- Added support for callables on model fields' choices.

2023-09-14T13:15:33Z

Fixed #31262 -- Added support for mappings on model fields and ChoiceField's choices.

2023-08-31T01:57:40Z

Added tests for model field's choices iterator/iterable values.

2023-08-22T03:55:23Z

Fixed #34388 -- Allowed using choice enumeration types directly on model and form fields.

2023-03-21T18:44:41Z

Relaxed some query ordering assertions in various tests.

2022-04-14T10:12:13Z

It accounts for differences seen on MySQL with MyISAM storage engine.

Refs #33476 -- Reformatted code with Black.

2022-02-07T19:37:05Z

Fixed #33441 -- Restored immutability of models.Field.hash().

2022-01-14T06:00:48Z

Regression in 502e75f9ed5476ffe8229109acf0c23999d4b533.