Make it possible to extend TypedModel

[jacobjove]

I'd like to extend TypedModel with another abstract model class.

I've tried the following:

from typedmodels.models import TypedModel
from typedmodels.models import TypedModelMetaclass


class MyTypedModel(TypedModel, metaclass=TypedModelMetaclass):
    pass

    class Meta:
        abstract = True

Then I make a model named Place inherit from MyTypedModel and from another abstract model class (Module, which adds a number of model fields such as slug):

class Place(MyTypedModel, Module):
    """Where something has happened."""

    name = models.CharField(
        verbose_name=_('name'),
        blank=True,
        max_length=NAME_MAX_LENGTH,
        unique=True,
    )
    location = models.ForeignKey(
        to='self',
        related_name='places',
        blank=True,
        null=True,
        on_delete=models.PROTECT,
    )
    preposition = models.CharField(max_length=2, choices=PREPOSITION_CHOICES, default='in')

    class Meta:
        unique_together = ['name', 'location']

    objects = TypedModelManager()
    slug_base_fields = ('string',)

However, this inheritance results in a TypeError:

File "/usr/local/lib/python3.9/site-packages/typedmodels/models.py", line 139, in __new__
cls = super(TypedModelMetaclass, meta).__new__(
File "/usr/local/lib/python3.9/site-packages/django/db/models/base.py", line 177, in __new__
raise TypeError(
TypeError: Abstract base class containing model fields not permitted for proxy model 'Place'.

I'm on Django 3.2.

Any direction on this would be much appreciated!

[craigds]

Thanks for the issue.

I'm having trouble understanding what this does. Could you share the Place model too? Is Place a direct subclass of MyTypedModel ?

[craigds]

Also what version of Django is this?

[jacobjove]

Hi @craigds, I've updated the issue description.