#25313: Document how to migrate from a built-in User model to a custom User
model
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Reporter: carljm | Owner: nobody
Type: New feature | Status: new
Component: Documentation | Version: 1.8
Severity: Normal | Resolution:
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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Comment (by carljm):
Hmm. Clearly it must be partially possible, otherwise you could never do
this at all if you use any third-party apps that link to `User` (since you
won't be changing their migration files). The whole reason we special-case
swappable models in migrations (instead of just treating them concretely)
is to allow for migrations to not be dependent on the value of
`AUTH_USER_MODEL`, so that reusable apps depending on `User` can still
generate workable migrations.
It's true that changing `AUTH_USER_MODEL` changes the _meaning_ of
historical migrations in some sense, but it still seems to me that if our
approach for reusable apps actually works, the same migration files ought
to be salvageable (presuming that when you switch `AUTH_USER_MODEL` you
point it to a new model that is initially exactly the same as the previous
one, and then only modify it in later, separate migrations).
But you've actually done this and I haven't, so I'm probably wrong...
--
Ticket URL: <https://code.djangoproject.com/ticket/25313#comment:5>
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