I'm no guru, Im stuck also with some many-to-many features. 1.- why whould you need a 3rd table if you are not using attributes in the relationship? (Variant). 2.- have you tried to add an models.AutoField(primary=True) to your model Variant ? I knew django does that if no is specified in order to preserve the 3rd normal form, but it would be a first aproach.
Hope this helped out a little. Regards ndarkduck On Oct 30, 7:40 am, chris <[EMAIL PROTECTED]> wrote: > Hi there, > > I am still pretty new to django and just trying to figure out how it > is all supposed to work. > > I have the following models: > > *models.py: > > class Char(models.Model): > char = models.CharField(max_length=10) > variants = models.ManyToManyField("self", symmetrical=False, > through="Variant", related_name="varchars", blank=True, null=True) > > class Variant(models.Model): > char = models.ForeignKey(Char) > variant = models.ForeignKey(Char, related_name="vars") > > *admin.py: > > class CharVarInline(admin.StackedInline): > model = Variant > fk_name = "char" > raw_id_fields=("variant", "char",) > extra = 1 > > class CharAdmin(admin.ModelAdmin): > inlines = (CharVarInline,) > > This causes the variants part to be displayed with a char record in > admin. I also get a check-box there, which can be checked to delete > the inlined related recorded. However, when I try to used this to > delete the record and click save, the following error occurs: > > ValueError at /admin/chardb/char/70524/ > > 'Variant' instance needs to have a primary key value before a many-to- > many relationship can be used. > > Apparently, something is going wrong with the deletion, which lets > part of the record hang in empty air. But I have no idea where to > look or how to fix this. Does anybody has any idea? > > Any help appreciated, > > Chris --~--~---------~--~----~------------~-------~--~----~ 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 [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/django-users?hl=en -~----------~----~----~----~------~----~------~--~---