Django Unique Together (with foreign keys)

Question

I have a situation where I want to use the Meta options of unique_together to enforce a certain rule, here\'s the intermediary model:

Answer 1

From django 2.2+ versions, it is suggested to use constraint & Index as model class meta option:

https://docs.djangoproject.com/en/2.2/ref/models/options/#django.db.models.Options.unique_together

https://docs.djangoproject.com/en/2.2/ref/models/options/#django.db.models.Options.constraints