Filtering on fields which start with _

[elihaims]

Hello,

It appears as if it is not possible to filter or exclude on fields which start with an _.

For example: MyPolymorphicModel.objects.filter(related_object___related_object_field="query") raises AttributeError: 'module' object has no attribute 'get_model' (Note: the field on related_object is _related_object_field with a leading underscore).

Based on the line comment here: https://github.com/django-polymorphic/django-polymorphic/blob/master/polymorphic/query_translate.py#L133, it appears as if the existence of a triple underscore in a filter expression implies that some polymorphic filtering should occur. This is not the case in my example, and it seems very limiting to assume that any query with a triple underscore is attempting to filter for a polymorphic field rather than a field which has a name starting with an underscore.

Thanks for your help!

[vdboor]

Hmm that's odd, because this filtering does work in other places. When the ___ doesn't match a classname, it's supposed to fallback to a field matching like you'd expect.

[vdboor]

We already have unit tests for this test case (test_polymorphic___filter_field / test_polymorphic___filter_reverse_field), so it seems your model layout still triggers a bug somewhere else. Can you provide a short example app / model that reveals this bug?