admin.list_filter should accept methods with boolean property

[ashley@…]

Example:

I have a model with a start_time, end_time.
And a method that does something like this:

def overnight(self):

if self.end:

if self.start.day < self.end.day:

return True

else:

return False

overnight.boolean = True

It would be nice to be able to add overnight to list_filters, at least if boolean property set.

[Ashley Camba <ashwoods@…>]

sorry, found functionality already.

[simon]

I'm marking this as wontfix, because Django's filters work by generating SQL queries using the ORM - filtering on the return value of a function can't be translated in to a SQL query, so implementing this would require loading EVERY row in to the ORM and calling the function on every single one of them. This is too inefficient.

[ashley camba <stuff4ash@…>]

One posibility would be then a shortcut to be able to define filters with functions that return a queryset, and be able to add them to "list_filters".

[Brian Rosner]

Please don't reopen wontfixed tickets without discussion on the django-developers mailing list. The functionality described in this ticket is just not going to work due to reasonings Simon provided. There is already a ticket, #5833, that will provide a much more flexible list_filter in the future.

[(none)]

Milestone post-1.0 deleted