#24513: "... has no field named None" with M2MField when migrating
---------------------------------+--------------------------------------
Reporter: Kondou-ger | Owner: nobody
Type: Uncategorized | Status: new
Component: Migrations | Version: 1.8rc1
Severity: Normal | Resolution:
Keywords: migrations, bug | 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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Comment (by Kondou-ger):
In
[https://github.com/django/django/blob/1.8c1/django/db/backends/base/schema.py#L268
django.db.backends.base.schema.py#L268] the call to `get_field()` is done,
where
{{{
fields==(None, 'group'),
model._meta.unique_together==((None, 'group'),),
model==project.user__groups
}}}
The call to this is done at
[https://github.com/django/django/blob/1.8c1/django/db/backends/sqlite3/schema.py#L137
django.db.backends.sqlite3.schema.py#L137] where `temp_model==<class
'__fake__.User_groups'>`
I also have a Groups model that refers to User. But there is no unique
together constraint in the whole file:
{{{
class Groups(models.Model):
owner = models.ForeignKey(settings.AUTH_USER_MODEL,
related_name='owner')
members = models.ManyToManyField(settings.AUTH_USER_MODEL,
related_name='members')
name = models.CharField(max_length=50, unique=True,
validators=[RegexValidator(regex=r'^[\w.@+-]+$')])
displayname = models.CharField(max_length=150, blank=True)
description = models.CharField(max_length=5000, blank=True)
default_moderators = models.ManyToManyField(settings.AUTH_USER_MODEL,
related_name="group_default_moderators")
}}}
--
Ticket URL: <https://code.djangoproject.com/ticket/24513#comment:2>
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