#30966: Migration crashes due to foreign key issue, depending on otherwise
irrelevant order on MySQL.
-------------------------------------+-------------------------------------
Reporter: Peter Thomassen | Owner: Hasan
| Ramezani
Type: Bug | Status: assigned
Component: Migrations | Version: master
Severity: Normal | Resolution:
Keywords: migration mySQL | Triage Stage: Accepted
Has patch: 1 | Needs documentation: 0
Needs tests: 0 | Patch needs improvement: 1
Easy pickings: 0 | UI/UX: 0
-------------------------------------+-------------------------------------
Comment (by Hasan Ramezani):
Simon, I checked the `TODO` in `AlterField.state_forwards`, here is my
understanding.
When I run the test in my the patch(my patch in
[https://github.com/django/django/pull/12061 PR] + your patch in
comment:7) it fails on alter operation in `0002_alter_user_id` at line
`assert f.remote_field.model._meta.concrete_model._meta.apps is self.apps`
{{{
operations = [
migrations.AlterField(
model_name="user",
name="id",
field=models.CharField(default=uuid.uuid4, max_length=32,
primary_key=True),
),
]
}}}
It fails because there is an operation in `0001_initial` which run before
the above mentioned migration:
{{{
migrations.AlterField(
model_name="RRset",
name="subname",
field=models.CharField(blank=False, max_length=178),
),
}}}
this is an alter migration and the `AlterField.state_forwards` reloads 3
models of 4 (User, Domain, RRest) and don't reload the Token model.
If I reload the Token model this test will be passed.
Should I change the function to find proper models to reload?
Is it the right solution?
--
Ticket URL: <https://code.djangoproject.com/ticket/30966#comment:12>
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