id	summary	reporter	owner	description	type	status	component	version	severity	resolution	keywords	cc	stage	has_patch	needs_docs	needs_tests	needs_better_patch	easy	ui_ux
22207	Add `related_query_name` to GenericRelation for query operations (filter, order_by, etc.) from related model	Gabe Jackson	nobody	"`related_name` (reverse relation) should be added to GenericRelation to allow filtering from the related model.

The following patch provides this functionality including tests and documentation:
[https://github.com/gabejackson/django/compare/generic_rel_reverse?expand=1]

This is particularly useful for the following use cases:
{{{
class Product(model.Model):
    content_type = models.ForeignKey(ContentType)
    object_id = models.PositiveIntegerField()
    content_object = GenericForeignKey('content_type', 'object_id')

class CarProduct(model.Model):
    product = generic.GenericRelation('Product', related_name='cars')
# complex hierarchy of models accurately representing a car
# ...

class WineProduct(model.Model):
    product = generic.GenericRelation('Product', related_name='wines')
# complex hierarchy of models accurately representing wine
# ...

# Get all Cars as Products based on some specific criteria of the car, and order them by another property
>>> Product.objects.filter(cars__wheels__num_spokes=4).order_by(cars__windows__transparency)
}}}

This should also fix #16920

This is also very useful for django-filter ([https://github.com/alex/django-filter]) allowing to filter over GFKs when GenericRelations are defined."	New feature	closed	contrib.contenttypes	dev	Normal	fixed	contenttypes, generic, genericrelation, reverse		Unreviewed	1	0	0	0	0	0