#23614: Altering unique_together sometimes missing deleted fields
----------------------------+------------------------------------
Reporter: Naddiseo | Owner: nobody
Type: Bug | Status: new
Component: Migrations | Version: 1.7
Severity: Normal | Resolution:
Keywords: | Triage Stage: Accepted
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 bmispelon):
* stage: Unreviewed => Accepted
Comment:
Hi,
I can reproduce the issue (I had to use `c = models.ForeignKey('ham.Ham',
null=True)` though otherwise it asked me for a default when running
`makemigrations`).
The traceback under Python 3 provides a little bit more information:
{{{#!python
Traceback (most recent call last):
File "./django/db/models/options.py", line 404, in get_field_by_name
return self._name_map[name]
AttributeError: 'Options' object has no attribute '_name_map'
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "./django/db/models/options.py", line 407, in get_field_by_name
return cache[name]
KeyError: 'a'
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "manage.py", line 10, in <module>
execute_from_command_line(sys.argv)
File "./django/core/management/__init__.py", line 336, in
execute_from_command_line
utility.execute()
File "./django/core/management/__init__.py", line 328, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File "./django/core/management/base.py", line 369, in run_from_argv
self.execute(*args, **cmd_options)
File "./django/core/management/base.py", line 419, in execute
output = self.handle(*args, **options)
File "./django/core/management/commands/migrate.py", line 193, in handle
executor.migrate(targets, plan, fake=options.get("fake", False))
File "./django/db/migrations/executor.py", line 63, in migrate
self.apply_migration(migration, fake=fake)
File "./django/db/migrations/executor.py", line 97, in apply_migration
migration.apply(project_state, schema_editor)
File "./django/db/migrations/migration.py", line 107, in apply
operation.database_forwards(self.app_label, schema_editor,
project_state, new_state)
File "./django/db/migrations/operations/fields.py", line 84, in
database_forwards
schema_editor.remove_field(from_model,
from_model._meta.get_field_by_name(self.name)[0])
File "./django/db/backends/sqlite3/schema.py", line 185, in remove_field
self._remake_table(model, delete_fields=[field])
File "./django/db/backends/sqlite3/schema.py", line 128, in
_remake_table
self.create_model(temp_model)
File "./django/db/backends/schema.py", line 253, in create_model
columns = [model._meta.get_field_by_name(field)[0].column for field in
fields]
File "./django/db/backends/schema.py", line 253, in <listcomp>
columns = [model._meta.get_field_by_name(field)[0].column for field in
fields]
File "./django/db/models/options.py", line 410, in get_field_by_name
% (self.object_name, name))
django.db.models.fields.FieldDoesNotExist: Spam has no field named 'a'
}}}
Thanks!
--
Ticket URL: <https://code.djangoproject.com/ticket/23614#comment:2>
Django <https://code.djangoproject.com/>
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