#24547: Errors for paths for Model relationships in other apps can be misleading / confusing --------------------------------------+------------------------------------ Reporter: akulakov | Owner: nobody Type: Cleanup/optimization | Status: new Component: Migrations | Version: master Severity: Normal | Keywords: error message, warning Triage Stage: Unreviewed | Has patch: 0 Easy pickings: 1 | UI/UX: 0 --------------------------------------+------------------------------------ If a user is creating a relationship to a model in another app, it would be natural to use a path like: ForeignKey('app2.models.Model2'). This is consistent with e.g. urlconf where views are referenced like 'myapp.views.my_view', or generally django imports that use dots to separate elements of a full path.
The error you would get looks like this: app2.M1.f3: (fields.E300) Field defines a relation with model 'app3.models.M1', which is either not installed, or is abstract. It might seem like it's not a big deal -- user just has to look at the docs or google for the error. However, in some cases it may lead to some loss of time, for example I had circular foreign key dependencies between models for testing and thought the error is due to circular references. More generally, django errors can result from seemingly unrelated causes so if a user starts with a firm assumption that a full path needs to be given, the error might lead them to look for all kinds of workarounds to try before coming back to the path format. It would be easy for django to check the path and, if there are more than one dot in path, and specifically if '.models.' is included in path, a hint should be shown along with the error: > NOTE: path should be of the form 'myapp.MyModel' and should NOT include the name of module containing models (which is usually 'models'). -- Ticket URL: <https://code.djangoproject.com/ticket/24547> 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/051.528d460b3b31a576d10f4f45e2ed2ef8%40djangoproject.com. For more options, visit https://groups.google.com/d/optout.