#25354: Can't use related_query_name on an abstract base class
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Reporter: jpulec | Owner: nobody
Type: New feature | Status: new
Component: Database layer (models, ORM) | Version: 1.8
Severity: Normal | Keywords:
Triage Stage: Unreviewed | Has patch: 0
Easy pickings: 0 | UI/UX: 0
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It currently isn't possible to set related_query_name on a field on an
abstract base class using the "%(class)s" or "%(app_label)s" string
formatting syntax that is allowed for the related_name parameter of field.
This is particularly problematic when trying to define an abstract base
class that uses a GenericRelation, since you can't specify a related_name,
but can specify a related_query_name.
For Example:
{{{
#!div style="font-size: 80%"
Code highlighting:
{{{#!python
class Child(models.Model):
object_id = PositiveIntegerField()
content_type = ForeignKey(ContentType)
content_object = GenericForeignKey()
class GenericMixin(models.Model):
relation = GenrericRelation(Child, related_query_name='%(class)s')
class Meta:
abstract = True
class Parent(GenericMixin):
name = CharField()
instance = Child.objects.filter(parents__name) # This query will not
work, as 'parents' is not set as the related_query_name for the Parent
Model
}}}
}}}
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Ticket URL: <https://code.djangoproject.com/ticket/25354>
Django <https://code.djangoproject.com/>
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