In the case of database models, Django uses the descriptors to retrieve, save, update and delete your data in the database. The one actual instance method in the above code is __str__, which every ...

Additionally, support is offered for composite primary keys, and a new django.db.models.CompositePrimaryKey allows the creation of tables with a primary key consisting of multiple fields.

As you saw, Django expects you to describe your models using Python code. The model description is then transformed into SQL and compared with any previous version of the model that might have existed ...