#34165: migrate management command does not respect database parameter when
adding
Permissions.
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Reporter: Vasanth | Owner: nobody
Type: Bug | Status: new
Component: contrib.auth | Version: 4.1
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 Mariusz Felisiak):
> Apart from that, if we don't want to set directly the internal attribute
`_state.db`, I guess we would need a proper way to pass the `db`/`using`
to the model instantiation.
`_state` is
[https://docs.djangoproject.com/en/4.1/ref/models/instances/#state
documented] so using it is not so bad.
> What would be the most ''Django-y'' way?
> - Passing it through the model constructor => this has quite a large
impact, as a keyword argument would possibly shadow existing field names:
`Permission(..., db=using)`. Quite risky in terms of backward
compatibility I guess.
> - Adding a method to `Model`? Something like:
`Permission(...).using(db)`, which could perhaps then be re-used in other
places also.
>
> What do you think ? :) Or am I missing other solutions?
Django doesn't support cross-db relationships and users were always
responsible for assigning related objects from the same db. I don't think
that we should add more logic to do this. The `Permission`-`content_type`
issue is really an edge case in managing relations, as for me we don't
need a generic solution for it.
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Ticket URL: <https://code.djangoproject.com/ticket/34165#comment:12>
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