[Django]-Django : content_type_id in GenericForeignKey

In your database maybe have table is django_content_type. And content_type, content_type_id, content_object reference in this table. Its use for define anything like “type” of your data.

Like a wheel, it maybe wheel of car or bicycle. In this case car and bicycle is a content_object. And id of car and bicycle in table django_content_type is content_type_id