Re: makemigrations generates new migration when nothing has changed

On 1/12/2016 3:56 AM, Francis Fisher wrote:
> Any idea why makemigrations would fail to recognise that a migration
> has already been generated?

I think migrations is seeing field choices differently each time it
scans the model. Can you use a list rather than a tuple for choices? (Or
vice versa - I don't remember) Or import the choices from another module?


>
> makemigrations.py is a script which calls makemigrations with
> appropriate django settings. If I run this once, it will generate the
> initial migration, but every time I run it subsequently, it will
> regenerate a migration even though nothing has changed in the model.
> This is with django 1.10.3 and postgres. The field sk that is
> constantly regenerated is a foreign key relation to an unmanaged
> database, but I have referred to this in a different app with no bother.
>
> I am using django 1.10.3.
>
> I found a post in this group that had a similar issue with
> instantiating a class in the model that was missing an implementation
> for __eq__ but that doesn't apply in this case as I don't instantiate
> any class in the model file.
>
> Is there any common mistake that leads to this outcome?
>
> ------------------
>
> user@testenv:~/eit/testproj$ ./makemigrations.py
> Migrations for 'sk':
> testproj/sk/migrations/0001_initial.py:
> - Create model SKM
> user@testenv:~/eit/testproj$ ./makemigrations.py
> Migrations for 'sk':
> testproj/sk/migrations/0002_auto_20161130_1643.py:
> - Alter field s on skm
> user@testenv:~/eit/testproj$
> user@testenv:~/eit/testproj$ ./makemigrations.py
> Migrations for 'sk':
> testproj/sk/migrations/0003_auto_20161130_1643.py:
> - Alter field s on skm
>
>
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