artem
Reputation: 16777
How to prevent deletion of related ForeignKey instances?
I have:
- Model1
- Model2 with field ForeignKey(Model1)
I want to delete Model1 instance, but when I do it, the related Model2 instance is deleted too. How to prevent its deletion?
Upvotes: 1
Views: 385
Answers (1)
Jacek Konieczny
Reputation: 8604
Clear (set to None) the foreign key field of the Model2 instance or point it to some other Model1 instance, before removing the Model1 instance. Otherwise data consistency would be broken if Model1 instance was removed by the Model2 instance not.
Upvotes: 1
Related Questions
- Django: ForeignKey on_delete SET_DEFAULT behavior
- Can I prevent Django from deleting an object depending on an attribute in a referencing type?
- how do I manage deletion with multiple foreign keys to the same table in Django?
- Django: how to save model instance after deleting a ForeignKey-related instance?
- Is there any way to override foreign key delete protection in Django?
- Django, make model that refer more than equal 2 foreign key but not be deleted CASCADE
- How do I stop this cascading delete from happening in Django?
- Deleting related objects deletes the ForeignKey object
- Deletion of objects in Django with foreign key in it
- How do I create a Django model with ForeignKeys which does not cascade deletes to its children?