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)