#23702: sqlite3 schema editor fails when altering a model's pk
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Reporter: gavinwahl | Owner: nobody
Type: Uncategorized | Status: new
Component: Database layer (models, ORM) | Version: 1.7
Severity: Normal | Keywords:
Triage Stage: Unreviewed | Has patch: 0
Easy pickings: 0 | UI/UX: 0
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I changed the pk in my model from the implicit one to a custom one -- `id
= models.BigIntegerField(primary_key=True)` -- and generated a migration:
{{{#!python
operations = [
migrations.AlterField(
model_name='foo',
name='id',
field=models.BigIntegerField(serialize=False,
primary_key=True),
),
]
}}}
This migration fails to run on sqlite:
{{{
Traceback (most recent call last):
File "./manage.py", line 11, in <module>
execute_from_command_line(sys.argv)
File "/srv/python-environments/sb/local/lib/python2.7/site-
packages/django/core/management/__init__.py", line 385, in
execute_from_command_line
utility.execute()
File "/srv/python-environments/sb/local/lib/python2.7/site-
packages/django/core/management/__init__.py", line 377, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File "/srv/python-environments/sb/local/lib/python2.7/site-
packages/django/core/management/base.py", line 288, in run_from_argv
self.execute(*args, **options.__dict__)
File "/srv/python-environments/sb/local/lib/python2.7/site-
packages/django/core/management/base.py", line 338, in execute
output = self.handle(*args, **options)
File "/srv/python-environments/sb/local/lib/python2.7/site-
packages/django/core/management/commands/migrate.py", line 160, in handle
executor.migrate(targets, plan, fake=options.get("fake", False))
File "/srv/python-environments/sb/local/lib/python2.7/site-
packages/django/db/migrations/executor.py", line 63, in migrate
self.apply_migration(migration, fake=fake)
File "/srv/python-environments/sb/local/lib/python2.7/site-
packages/django/db/migrations/executor.py", line 97, in apply_migration
migration.apply(project_state, schema_editor)
File "/srv/python-environments/sb/local/lib/python2.7/site-
packages/django/db/migrations/migration.py", line 107, in apply
operation.database_forwards(self.app_label, schema_editor,
project_state, new_state)
File "/srv/python-environments/sb/local/lib/python2.7/site-
packages/django/db/migrations/operations/fields.py", line 139, in
database_forwards
schema_editor.alter_field(from_model, from_field, to_field)
File "/srv/python-environments/sb/local/lib/python2.7/site-
packages/django/db/backends/schema.py", line 473, in alter_field
self._alter_field(model, old_field, new_field, old_type, new_type,
old_db_params, new_db_params, strict)
File "/srv/python-environments/sb/local/lib/python2.7/site-
packages/django/db/backends/sqlite3/schema.py", line 190, in _alter_field
self._remake_table(model, alter_fields=[(old_field, new_field)])
File "/srv/python-environments/sb/local/lib/python2.7/site-
packages/django/db/backends/sqlite3/schema.py", line 78, in _remake_table
del body[old_field.name]
KeyError: u'id'
}}}
Changing
{{{#!python
del body[old_field.name]
del mapping[old_field.column]
}}}
To
{{{#!python
body.pop(old_field.name, None)
mapping.pop(old_field.column], None)
}}}
fixes the issue and the migration runs.
--
Ticket URL: <https://code.djangoproject.com/ticket/23702>
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