i'm having an annoying issue with django model system + its default admin.
Let's assume i have a very simple model like:
class Note(models.Model):
text = models.CharField(max_length=200)
def __unicode__(self):
return self.text
and a container like:
class NoteCollection(models.Model):
notelist = models.ManyToManyField(Note)
title = models.CharField(max_length=20)
def __unicode__(self):
return self.title
What i want do to it's update all the "Note" elements when a NoteCollection gets Added. I read that m2m models have complex save mechanism, so what i was thinking is, let's read the form object, and just save the Note elements by myself!!
But when i make something like this in APPNAME/admin.py:
from models import Note,NoteCollection
from django.contrib import admin
class NoteCollectionAdmin(admin.ModelAdmin):
def save_model(self, request, obj, form, change):
# Something USEFUL HERE
pass
admin.site.register(Note)
admin.site.register(NoteCollection, NoteCollectionAdmin)
Django pops me an error: ('NoteCollection' instance needs to have a primary key value before a many-to-many relationship can be used.)
I don't even want to use the NoteCollection object at all, i'm interested in the form object, actually..
I've also found on internet some examples that use save_model with a M2M field, so i can't understand why i keep getting this error; for reference, i've just made a new-from-scrap project and i'm using an sqlite db for testing
