#28980: Django doesn't check the type of one-off value
----------------------------------------+------------------------
Reporter: Nikos Katsos | Owner: nobody
Type: Bug | Status: new
Component: Migrations | Version: 2.0
Severity: Normal | 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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As the title says Django doesn't check the type of one-off value. Recently
I had a field like this
{{{
start_time = models.DateTimeField(editable=False)
}}}
1) I gave to the field an one-off value
{{{
>>> 0
}}}
2) then the migration file had those operations
{{{
operations = [
migrations.AddField(
model_name='x',
name='outcome',
field=models.CharField(default='TO', max_length=16),
preserve_default=False,
),
migrations.AddField(
model_name='x',
name='start_time',
field=models.DateTimeField(default=0 editable=False),
preserve_default=False,
),
]
}}}
when I found my error i couldn't really do anything
I changed
{{{
field=models.DateTimeField(default=0, editable=False),
}}}
to
{{{
field=models.DateTimeField(default=timezone.now,
editable=False),
}}}
so after updating my migration file, I got an error
"django.db.utils.OperationalError: (1060, "Duplicate column name
"outcome")".
I could neither re-migrate because the operations isn't a bunch of queries
in transaction, nor create a new migration.
Only reverting to zero and apply all migrations again worked.
This has to have a workaround.
--
Ticket URL: <https://code.djangoproject.com/ticket/28980>
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