Django 3 Web Development Cookbook - Fourth Edition

How it works...

As you can see, this snippet is more complex than the previous ones.

The object_relation_base_factory function, which we have aliased to generic_relation, for short, in our import, is not a mixin itself; it is a function that generates a model mixin – that is, an abstract model class to extend from. The dynamically created mixin adds the content_type and object_id fields and the content_object generic foreign key that points to the related instance.

Why can't we just define a simple model mixin with these three attributes? A dynamically generated abstract class allows us to have prefixes for each field name; therefore, we can have more than one generic relation in the same model. For example, the Like model, which was shown ...