On 4/02/2013 8:07pm, m1chael wrote:
I'll admit that i'm a bit old-school and most people are going to
cringe at seeing this,
I would set a DB trigger with the raw logic
I hadn't thought of that but I think it would be my last resort. I'd
like to keep all the logic in one place. The answer has to be in a
models.Manager somewhere. I guess I need to dig deeper.
Thanks
Mike
On Mon, Feb 4, 2013 at 2:14 AM, Mike Dewhirst <mi...@dewhirst.com.au> wrote:
This is the error ... Select a valid choice. That choice is not one of the
available choices.
I want to delete a bunch of "child" records when a "parent" record is
deleted. While I'm using that terminology they are not actually related in
the usual sense. All however are in foreign key relationships with the same
owner/master.
The child records all know which parents they have because the parent added
its mark to a field in the child when the child record got created and
linked to the master. In fact if that child had been added by another
parent, the next parent just adds its mark instead of adding another child.
When a parent gets deleted from the master, its mark is removed from all the
child records it was involved with and if it was the only mark the child
gets deleted too. Or at least that is what I want to happen.
My question is:
In overview, how should I be doing this?
At the moment I'm trying to do it all via model methods calling various
managers because it feels like the right place to do it.
I have tried to make a custom manager with use_for_related_fields = True but
still get the same error.
Thanks for any help
Mike
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