Can't delete object with ManytoMany Relationship
|Reported by:||Dobbes||Owned by:||adrian|
|Has patch:||no||Needs documentation:||no|
|Needs tests:||no||Patch needs improvement:||no|
Description (last modified by adrian)
If you have an object with a manytomany relationship you can't delete it within the admin interface. As it spits out this error.
Traceback (most recent call last): File "/home/punteney/dobbes.com/django/core/handlers/modpython.py", line 214, in get_response return callback(request, **param_dict) File "/home/punteney/dobbes.com/django/views/admin/main.py", line 1057, in delete_stage obj.delete() File "/home/punteney/dobbes.com/django/core/meta.py", line 57, in _curried return args(*(args[1:]+moreargs), **dict(kwargs.items() + morekwargs.items())) File "/home/punteney/dobbes.com/django/core/meta.py", line 760, in method_delete cursor.execute("DELETE FROM %s WHERE %s=%%s" % (opts.db_table, opts.pk.name), [getattr(self, opts.pk.name)]) File "/home/punteney/dobbes.com/django/core/db/base.py", line 10, in execute result = self.cursor.execute(sql, params) IntegrityError: ERROR: update or delete on "blog_entries" violates foreign key constraint "$1" on "blog_entries_categories" DETAIL: Key (id)=(2) is still referenced from table "blog_entries_categories". DELETE FROM blog_entries WHERE id=2
This is from trying to delete a blog entry that is tied to the categories. The line in the Entry model is:
I can't remove the category linking before I delete it as it is a required field so it comes back with an error message saying that the field is required.
Change History (8)
comment:6 Changed 9 years ago by adrian
- Resolution set to fixed
- Status changed from assigned to closed