django/tests/app_loading/not_installed/models.py

from django.db import models


class NotInstalledModel(models.Model):
    class Meta:
        app_label = "not_installed"


class RelatedModel(models.Model):
    class Meta:
        app_label = "not_installed"

    not_installed = models.ForeignKey(NotInstalledModel, models.CASCADE)


class M2MRelatedModel(models.Model):
    class Meta:
        app_label = "not_installed"

    not_installed = models.ManyToManyField(NotInstalledModel)