Django 3 Web Development Cookbook - Fourth Edition

How to do it...

To create and use a mixin for generic relations follow these steps:

1. Open the models.py file in the core package in a text editor, and insert the following content there:

# myproject/apps/core/models.pyfrom django.db import modelsfrom django.utils.translation import gettext_lazy as _from django.contrib.contenttypes.models import ContentTypefrom django.contrib.contenttypes.fields import GenericForeignKeyfrom django.core.exceptions import FieldErrordef object_relation_base_factory(        prefix=None,        prefix_verbose=None,        add_related_name=False,        limit_content_type_choices_to=None,        is_required=False):    """    Returns a mixin class for generic foreign keys using    "Content type - object ID" with dynamic field names. This function is just ...