How to limit manytomanyfields on a model ?
- by Tom
I would like to check that I get not more than 3 relations set on a manytomanyfield.
I tried on the clean method to do this :
if self.tags.count()>3:
raise ValidationError(_(u'You cannot add more than 3 tags'))
But self.tags returns not the current updates... only saved objects.
Do you have an idea to access to them ?
Thanks