Hi all,
Some time ago I created 'new feature` ticket
<https://code.djangoproject.com/ticket/27580> and Tim Graham asked me to
write here to get some feedback on the idea. So here it is.
ContentType model is quite specific, so we could add the subclass of
ForeignKey with some specific features.
For example, we have a model:
class ModelWithContentType(models.Model):
ct = ContentTypeField(on_delete=models.CASCADE)
In comparison with ForeignKey ContentTypeField will have these features:
1. ModelWithContentType.objects.first().ct will use content types cache
1. ContentTypeField will support lookups on the model classes (on model
instances too?):
ModelWithContentType.objects.filter(ct=FooModel) vs.
ModelWithContentType.objects.filter(ct=ContentType.objects.get_for_model(FooModel))
ModelWithContentType.objects.filter(ct__in=[FooModel, BarModel]) vs.
ModelWithContentType.objects.filter(ct__in=[ContentType.objects.get_for_model(model)
in [FooModel, BarModel]])
1. Creation using a model class as a value (not sure if it's useful
actually):
ModelWithContentType.objects.create(ct=FooModel)
Here's ​rough implementation
<https://github.com/sir-sigurd/django/tree/contenttype-field-3>.
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