Fixed #1891, Fixed #11707 -- Prevented duplicates with limit_choices_to on multi-value relations.
PR #13315 ↗ · django/django · · merged Oct 27, 2020 · +84−4 · base 36bc47069ce0
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limit_choices_to on a ForeignKey can render duplicate options in formfield
Description
If you pass a Q object as limit_choices_to on a ForeignKey field involving a join, you may end up with duplicate options in your form.
See regressiontest in patch for a clear view on the problem.
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