You should use ForeignKey: from django.db import models class Car(models.Model): manufacturer = models.ForeignKey( 'Manufacturer', on_delete=models.CASCADE, )
Here is what the above code is Doing:
1. The ForeignKey tells Django each Car is related to a single Manufacturer.
2. The on_delete=models.CASCADE argument tells Django to delete the Car when the related Manufacturer is deleted.
3. The related_name argument allows us to give the reverse relationship a custom name.