Re: Proposed feature: Selective Foreign Keys

This a great solution to this problem, one I've found to be very common in
web development. The technique will work to add RI to Django's generic
foreign keys[1]https://docs.djangoproject.com/en/dev/ref/contrib/contenttypes/#generic-relations, which are implemented with an id column and a type-flag
column.

[1]: https://docs.djangoproject.com/en/dev/ref/contrib/contenttypes/#generic-relations
https://docs.djangoproject.com/en/dev/ref/contrib/contenttypes/#generic-relations