Thanks Claude Paroz for assistance with debugging the tests.

Thanks bendavis78 for the report.

Forwardport of 29585e9b from stable/1.7.x

Also added StrAndUnicode mixin note to deprecation plan as it was
missing.

Thanks bjb at credil.org for the suggestion and
Ivan Mesic for the draft patch.

Such a field will no longer pass model validation.

Thanks Michael Miller for reporting the issue.

This fixes escaping of special characters on Windows.

Fixed #22745 -- Prevented reevaluation of ModelChoiceField's queryset when accesssing BoundField's attrs.

Thanks Christian Schmitt for review.

Seems like unlike other backends MySQL get_constraints fails when dealing
with a non-existing table. refs #23160.

Thanks to whitews AT gmail for the report.

This somewhat fixes #23088, refs 23140.

This reverts commit 6508db2f.

Refs #23088.

Thanks django at patrickbregman.eu for the report.

Thanks Baptiste Mispelon for the suggestion.