I have a model object that looks something like this: class Foo(models.Model) foo_id = models.IntegerField(primary_key = True) xyz = models.CharField(max_length = 20)
In my application, I'd like to add a list of Bar objects. It's like a foreign key, except that Bar objects don't exist in my databases. So I want a Foo.bars field. - If I just create the field: class Foo(models.Model) foo_id = models.IntegerField(primary_key = True) xyz = models.CharField(max_length = 20) bars = [] Then the list belongs to the class, not instances. - If I try creating the field lazily, e.g. class Foo(models.Model) foo_id = models.IntegerField(primary_key = True) xyz = models.CharField(max_length = 20) def attach_bar(self, bar): if self.bars is None: self.bars = [] self.bars.append(bar) Then calling attach_bar from the application results in an AttributeError, 'Foo' object has no attribute 'bars'. - Specifying Foo.__init__ to initialize bars doesn't work, because it interferes with creation of Foo objects from database queries. I played around with subclassing, e.g. class FooBase (models.Model) ... class Foo(FooBase) but couldn't get that to work. How can I add a field to the Foo class that doesn't come from the database? Jack Orenstein --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Django users" group. To post to this group, send email to django-users@googlegroups.com To unsubscribe from this group, send email to django-users+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/django-users?hl=en -~----------~----~----~----~------~----~------~--~---