on_update foreign key

[mirzadelic1@…]

When i use custom primary key and i change value of it, my foreign keys can't be updates, there is no on_update cascade option?
I use postgres db.

[Anssi Kääriäinen]

No, there is currently no on_update functionality. In addition, it is unlikely that Django will ever officially support cascades for foreign keys targeting updatable primary keys. It is somewhat likely that updatable primary keys will be documented as unsupported.

I am marking this as wontfix. This resolution is specifically about on_update for foreign keys targeting primary key values. I do support adding on_update support to foreign keys targeting other fields than the model's primary key.

As a workaround you can manually alter the database constraints to be "ON UPDATE CASCADE".

[anonymous]

I did manualy that and its working on db level, but when edit in django i get "list index out of range" ?

[Anssi Kääriäinen]

Sorry, this isn't a support channel. Try to ask for help at #django IRC channel or django-users mailing list.