CODEWITHSUNDEEP
djangodjango-models
GrantU
GrantU

Reputation: 6555

Django cascade delete option?

My model does not cascade delete?

I have a FK in a model called below called 'link' upon deleting product link does not get deleted.

class Product(models.Model):
    name = models.CharField(max_length=80, blank=True)
    objects = ContentManager()
    #FK
    link = models.ForeignKey(Link, related_name="content", null=True, blank=True)

When I delete product FK remains, why?

Delete Code:

@login_required
def delete_product(request):
    if request.POST:
        product = get_object_or_404(Product, pk=request.POST['product_id'])
            product.delete()

Link Model:

class Link(models.Model):
    link = models.URLField()
    hits = models.IntegerField(default=0)

Upvotes: 0

Views: 5748

Answers (2)

Jeff_Hd
Jeff_Hd

Reputation: 2244

Your foreignkey is in the wrong model and should be in the Link model.

I suspect that if you delete a link instance right now it will delete any associated products

Upvotes: 3

Moamen
Moamen

Reputation: 706

.delete method is not invoked when delete in bulk; as Queryset generate the sql statement and execute it directly. So deletion of ForeignKey field not invoked. If you do that, you may need to use pre_delete and/or post_delete signals.

https://docs.djangoproject.com/en/1.4/topics/db/queries/#topics-db-queries-delete

Upvotes: 0

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