#32330: Inheritance for already existing models will throw an exception
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Reporter: Vadim Fabrichnov | Owner: nobody
Type: Bug | Status: closed
Component: Migrations | Version: 3.1
Severity: Normal | Resolution: worksforme
Keywords: | Triage Stage: Unreviewed
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 Mariusz Felisiak):
* status: new => closed
* resolution: => worksforme
Comment:
Replying to [ticket:32330 Vadim Fabrichnov]:
> You will get an exception:
>
> {{{
> django.core.exceptions.FieldError: Local field 'id' in class 'B' clashes
with field of the same name from base class 'A'.
> }}}
I cannot reproduce this issue, after changing inheritance
`makemigrations` creates (as expected) two operations:
- `Remove field id from b`
- `Add field a_ptr to b`
> btw, if you have more than one model in bases, you will get the error
also, even if it's a freshly created model.
This is a [https://docs.djangoproject.com/en/3.1/topics/db/models
/#multiple-inheritance documented behavior].
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Ticket URL: <https://code.djangoproject.com/ticket/32330#comment:1>
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