Try bisecting to find the commit in Django where the behavior changed: https://docs.djangoproject.com/en/dev/internals/contributing/triaging-tickets/#bisecting-a-regression
On Saturday, October 29, 2016 at 9:57:53 AM UTC-4, [email protected] wrote: > > Hi all, > > I have a simple model whichs acts as custom many-to-many association table > with additional data. > > ``` > class NetworkLinkAssociation(models.Model): > """ > We use our own many-to-many association table, because we want to keep > track which links are added, and which links are deleted/disabled in > comparison to the parent network. > """ > > network = models.ForeignKey('Network', related_name='links_assoc', > on_delete=models.CASCADE) > link = models.ForeignKey('Link', related_name='networks_assoc', > on_delete=models.CASCADE) > > type = enum.EnumField(AssociationType, > default=AssociationType.UNCHANGED, > null=True) > > class Meta: > unique_together = ('network', 'link') > > @property > def link_disabled(self): > return self.type == AssociationType.REMOVED > ``` > > When trying to simply create a new object django raises an error: > > ``` > link_assoc = NetworkLinkAssociation() > link_assoc.link = link > link_assoc.network = network > link_assoc.save() > ``` > > "ValueError: Cannot force an update in save() with no primary key.". > > I'm 100% sure the `link` and `network` objects exist, so what else could > the problem be? This used to work fine Django 1.9. > > Possibly related bug on Github: > https://github.com/jpwatts/django-positions/issues/49 > > Thanks in advance, > Lucas > > -- You received this message because you are subscribed to the Google Groups "Django users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/django-users. To view this discussion on the web visit https://groups.google.com/d/msgid/django-users/2fd25feb-93f5-4463-9a24-c79cdcf54456%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
