diff options
| -rw-r--r-- | django/db/models/fields/related.py | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/django/db/models/fields/related.py b/django/db/models/fields/related.py index ead1d49b57..387d447ff6 100644 --- a/django/db/models/fields/related.py +++ b/django/db/models/fields/related.py @@ -591,12 +591,14 @@ def create_many_related_manager(superclass, rel): "a many-to-many relationship can be used." % instance.__class__.__name__) - def _get_fk_val(self, obj, field_name): """ Returns the correct value for this relationship's foreign key. This might be something else than pk value when to_field is used. """ + if not self.through: + # Make custom m2m fields with no through model defined usable. + return obj.pk fk = self.through._meta.get_field(field_name) if fk.rel.field_name and fk.rel.field_name != fk.rel.to._meta.pk.attname: attname = fk.rel.get_related_field().get_attname() |