what happens when we use on_delete=models.CASCADE in django

Question

what happens when we use "on_delete=models.CASCADE" in django models

class HospitalStay(models.Model):

    patient = models.ForeignKey(User, on_delete = models.CASCADE)

What is unclear about [the documentation](https://docs.djangoproject.com/en/2.1/ref/models/fields/#django.db.models.CASCADE) for that option? — Daniel Roseman, Jan 17 '19 at 09:58

score 16 · Answer 1 · answered Jan 17 '19 at 10:10

16

CASCADE means that the row will be deleted too if the ForeignKey gets deleted.

In your case, HospitalStay instance will be deleted if the User Linked to it gets deleted.

1 Answers1