Hello everyone,
I'm new to Django and struggling a bit to build a form UI to manage a m2m
relationship the way I would like. The stock inline formset technique gives
me the functionality I need, of course, but I was hoping to be able to
build a form that allows the user to "activate/deactivate" relationships
rather than "add/delete" them. Let me explain:
I want to be able to manage customers' subscription preferences to various
types of customer service communications. These entities are embodied in
models called "customer" and "communication." The many-to-many relationship
between them is encapsulated in an intermediary class called "subscription"
which also reflects the customer's preferred medium (e.g., email, phone,
etc.) for receiving the given communication.
So my model looks something like this:
class Customer (models.Model):
...class Subscription (models.Model):
medium = models.CharField(max_length=50)
campaign = models.ForeignKey(Communication)
customer = models.ForeignKey(Customer)class Communication
(models.Model):
name = models.CharField(max_length=100)
As I've said, I've been able to achieve a basic level of functionality with
an off-the-rack inline formset. This gives me a form that lists all the
subscribed communications and the ability to modify those, delete them, or
ad new ones. So far so good.
But what I would really like is a form that displays one sub-form (e.g.,
one row in a tabular form) for every communication that a customer could
subscribe to with the name of that communication, a field for medium, and a
checkbox to select whether that subscription was "active" or not. If that
box is checked, a subscription will be added to the database (or updated,
if it is already there), if it is unchecked, the corresponding subscription
will be deleted (if it exists). But regardless, there would be one row for
each possible communication whether it was subscribed to or not -- it's
just that the active box would be pre-checked and the "medium" field
pre-filled in rows that correspond to subscriptions that exist in the
databse.
My sense is that I need to create a custom modelform and modelformset to
handle this logic, but Im having difficulty figuring out exactly how to do
this. I also want to make sure I'm not making this harder than it needs to
be. (Django being Django, I sometimes imagine that there could simply a
parameter that I could pass to the inlineformset_factory that would do all
this for me. Such a thing certainly seems possible.)
Any ideas?
Thanks a lot,
Paul
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