Django 3 Web Development Cookbook - Fourth Edition

How to do it...

Follow these practices when working with models that use models from other apps:

1. For foreign keys and many-to-many relationships with models from other apps, use the "<app_label>.<model>" declaration instead of importing the model. In Django this works with ForeignKey, OneToOneField, and ManyToManyField, for example:

# myproject/apps/ideas/models.pyfrom django.db import modelsfrom django.conf import settingsfrom django.utils.translation import gettext_lazy as _class Idea(models.Model):    author = models.ForeignKey(        settings.AUTH_USER_MODEL,        verbose_name=_("Author"),        on_delete=models.SET_NULL,        blank=True,        null=True,    )    category = models.ForeignKey(        "categories.Category",        verbose_name=_("Category"),        blank=True,        null=True,        on_delete ...