Django model class and custom property

Question

Howdy - today a weird problem occured to me:

I have a modle class in Django and added a custom property to it that shall not be saved into the database and therefore

Answer 1

Don't do it that way. Your title attribute is completely "global". It's part of the class, not part of each instance.

Do something like this.

class Category(models.Model):
    groups = models.ManyToManyField(Group)
    @property
    def title(self):
        return self._title
    def save( self, *args, **kw  ):
        try:
            self._title
        except AttributeError:
            self._title= defaultdict()
        super( Category, self ).save( *args, **kw )

If you could define your actual use case, it might be possible to simplify this a great deal.