GenericRelation test case

interpreter

In [1]: from testapp.models import ModelA

In [2]: a = ModelA.objects.all()[0]

In [3]: a.my_related_cs
Out[3]: <django.db.models.fields.related.RelatedManager object at 0x101e1ca10>

In [4]: a.my_related_bs
---------------------------------------------------------------------------
AttributeError                            Traceback (most recent call last)

/Users/rlr/dev/testproj/<ipython console> in <module>()

AttributeError: 'ModelA' object has no attribute 'my_related_bs'

models.py

from django.contrib.contenttypes.models import ContentType
from django.contrib.contenttypes import generic
from django.db import models


class ModelA(models.Model):
    name = models.CharField(max_length=42)

    content_type = models.ForeignKey(ContentType)
    object_id = models.PositiveIntegerField()
    content_object = generic.GenericForeignKey('content_type', 'object_id')


class ModelB(models.Model):
    name = models.CharField(max_length=42)
    model_a = generic.GenericRelation(ModelA, related_name='my_related_bs')


class ModelC(models.Model):
    name = models.CharField(max_length=42)
    model_a = models.ForeignKey(ModelA, related_name='my_related_cs')

more interpreter

In [9]: from testapp.models import ModelB

In [10]: b = ModelB.objects.all()[0]

# This is code from django.contrib.admin.utils.get_deleted_objects which is called
# from the admin's delete confirmation view:

In [11]: from django.db import router

In [12]: using = router.db_for_write(ModelB)

In [13]: from django.contrib.admin.util import NestedObjects

In [14]: collector = NestedObjects(using=using)

In [15]: collector.collect([b])
ERROR: An unexpected error occurred while tokenizing input
The following traceback may be corrupted or invalid
The error message is: ('EOF in multi-line statement', (11, 0))

---------------------------------------------------------------------------
AttributeError                            Traceback (most recent call last)

/Users/rlr/dev/testproj/<ipython console> in <module>()

/Users/rlr/.virtualenvs/django/lib/python2.6/site-packages/django/contrib/admin/util.pyc in collect(self, objs, source_attr, **kwargs)
    125                 self.add_edge(None, obj)
    126         try:
--> 127             return super(NestedObjects, self).collect(objs, source_attr=source_attr, **kwargs)
    128         except models.ProtectedError, e:
    129             self.protected.update(e.protected_objects)

/Users/rlr/.virtualenvs/django/lib/python2.6/site-packages/django/db/models/deletion.pyc in collect(self, objs, source, nullable, collect_related, source_attr, reverse_dependency)
    179                                  source=model,
    180                                  source_attr=relation.rel.related_name,
--> 181                                  nullable=True)
    182 
    183     def related_objects(self, related, objs):

/Users/rlr/.virtualenvs/django/lib/python2.6/site-packages/django/contrib/admin/util.pyc in collect(self, objs, source_attr, **kwargs)
    121         for obj in objs:
    122             if source_attr:
--> 123                 self.add_edge(getattr(obj, source_attr), obj)
    124             else:
    125                 self.add_edge(None, obj)

AttributeError: 'ModelA' object has no attribute 'my_related_bs'

In ModelB does GenericRelation have a related_name param? I thought that was only ForeignKeys