I encountered a similar issue recently, but with auth permissions. It is described here: https://code.djangoproject.com/ticket/29843
On Wednesday, October 3, 2018 at 1:01:37 PM UTC+2, Marcin Nowak wrote: > > Hello. > > There is a huge issue with content types framework. The data is loaded > after every migration (post_migrate signal) automatically, and this > approach is against db data consistency. > The biggest problem is with data migrations, which are applied at the > first time (on clean database). Any data migration which depends on some > content types will not insert the data. > > The sequence looks like this: > > 1. create db > 2. insert into auth_permission ... inner join django_content_type ... > 3. post migrate: insert into django_content_type ... > > > Two things are wrong: > > - automatic creation of content types > - creation of content types after running migrations > > Solution: > > - creation of new app should add very first migration, which will add > entry to the content types > - create_contentypes handler should be removed from post_migrate signal > > Any data migration, which depends on some content types, should be > declared with proper dependency. This will guarantee existence of the > required content type entry. > > > BR, > Marcin > > > -- You received this message because you are subscribed to the Google Groups "Django developers (Contributions to Django itself)" group. To unsubscribe from this group and stop receiving emails from it, send an email to django-developers+unsubscr...@googlegroups.com. To post to this group, send email to django-developers@googlegroups.com. Visit this group at https://groups.google.com/group/django-developers. To view this discussion on the web visit https://groups.google.com/d/msgid/django-developers/dcab2996-a167-4f03-b84a-c900d3163678%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
