#22965: InvalidBasesError for unmigrated apps subclassing contrib
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Reporter: CollinAnderson | Owner: nobody
Type: Bug | Status: closed
Component: Migrations | Version: 1.7-rc-1
Severity: Release blocker | Resolution: duplicate
Keywords: | Triage Stage: Accepted
Has patch: 0 | Needs documentation: 0
Needs tests: 0 | Patch needs improvement: 0
Easy pickings: 0 | UI/UX: 0
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Changes (by andrewgodwin):
* status: new => closed
* resolution: => duplicate
Comment:
Yep, closing this in favour of #22922; this error is probably most caused
by unmigrated depending on migrated.
Collin: If we had migrated run before syncdb, then migrated apps couldn't
depend on unmigrated apps, which is much more untenable (think about all
the unmigrated apps in the wild; most new apps are going to be migrated,
so this way round works best). To detect dependencies we'd need to give
them migrations (due to the way syncdb handles circular foreign keys) and
tada, the problem has gone away anyway.
I wish we could solve this problem but I've looked into it a lot and we
can't. The reason the language is "it's not advised" is because you can
depend with foreign keys and suchlike fine; it's importing a base class
that really blows stuff up. We should at least mention that by name, and
probably call out auth specifically in the release notes as it's now
migrated.
--
Ticket URL: <https://code.djangoproject.com/ticket/22965#comment:6>
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