#25214: Behavior of _meta.auto_created = True in m2m through model is not expected. ----------------------------+-------------------- Reporter: Cinkz | Owner: nobody Type: Bug | Status: new Component: Migrations | Version: 1.8 Severity: Normal | Keywords: Triage Stage: Unreviewed | Has patch: 0 Easy pickings: 0 | UI/UX: 0 ----------------------------+-------------------- I have models like:
{{{ class A(models.Model): ... b = models.ManyToManyField( 'B', through='Through', ) ... class B(models.Model): ... class Through(models.Model): a = models.ForeignKey('A') b = models.ForeignKey('B') ... # other fields have default value class Meta: auto_created = False }}} If I make migrations at this point, joint table 'Through' will be created. Then if I set "Through._meta.auto_created = True" somewhere, and never update migrations. Everything works well. If I add a new relationship between A instance and B instance, a through object will be created with default value, which looks great. However if I update migrations, the "Through" model will be removed in migrations and everything break. I think a through model with auto_created=True should be kept in migrations and when new relationships created, through objects shall be created with claimed default value. -- Ticket URL: <https://code.djangoproject.com/ticket/25214> Django <https://code.djangoproject.com/> The Web framework for perfectionists with deadlines. -- You received this message because you are subscribed to the Google Groups "Django updates" group. To unsubscribe from this group and stop receiving emails from it, send an email to django-updates+unsubscr...@googlegroups.com. To post to this group, send email to django-updates@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/django-updates/048.73746dc4314e505f3faa283d8b14fe7a%40djangoproject.com. For more options, visit https://groups.google.com/d/optout.