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@@ -216,6 +216,10 @@ class BaseFilterSetTestMixin:
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# Tree filters match descendants by queryset rather than by to_field_name value
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if isinstance(filter, TreeNodeMultipleChoiceFilter) or type(target_field) is GenericRelation:
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continue
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+ # Only multiple-choice filters with an explicit to_field_name pass that attribute's value to the
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+ # lookup; single-choice filters and those without to_field_name pass the model instance itself
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+ if not isinstance(filter, django_filters.ModelMultipleChoiceFilter) or to_field_name is None:
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+ continue
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# A field_name ending in a relation is matched against the relation's target field
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expected_field = target_field.target_field
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msg = f"to_field_name for {filter_name} must match the target field of '{filter.field_name}'!"
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Arthur