GenericRelation doesn't play well with proxy models

[anonymous]

Take the following models:

class Person(models.Model):
    """
    Teenager (let's say this has the content type ID 1)
    """
    age = models.IntegerField()


class Teenager(Person):
    """
    Teenager (let's say this has the content type ID 2)
    """
    class Meta:
        proxy = True


class Pimple(models.Model):
    """
    A pimple.
    """
    content_type = models.ForeignKey(ContentType)
    object_id = models.IntegerField()
    content_object = generic.GenericForeignKey('content_type', 'object_id')
    color = models.CharField()

Now, if I create a PimpleInline on the TeenagerAdmin, and then create Pimple records with the main PimpleAdmin, setting the content type to Teenager (ie, 2), you would think that a refresh on the TeenagerAdmin would reveal my new pimple in the inline list, but it doesn't. This has to do with the GenericRelation.contrib_to_class which attaches an updated queryset along the way, filtering by the content type of the proxy's parent model.

[anonymous]

Please disregard the missing max_length argument and the duplicate "Teenager" pasted into Person.__doc__.

[Simon Charette]

This is a duplicate of #17648.