Opened 10 years ago

Last modified 6 years ago

#24424 closed Bug

Migrating an 'empty' model with SQLite gives an SQL syntax error — at Version 7

Reported by: Adam Hayward Owned by: Adam Hayward
Component: Migrations Version: 2.1
Severity: Normal Keywords:
Cc: Markus Holtermann, direx, Simon Charette Triage Stage: Accepted
Has patch: yes Needs documentation: no
Needs tests: no Patch needs improvement: no
Easy pickings: no UI/UX: no

Description (last modified by Adam Hayward)

Edit: pull-request with fix here ​https://github.com/django/django/pull/4223

On migrating an empty, abstract model, the method

django.db.backends.sqlite3.schema.DatabaseSchemaEditor._remake_table()

tries to execute the following SQL query:

INSERT INTO "companies_department__new" () SELECT FROM "companies_department";

The correct SQL would be:

INSERT INTO "companies_department__new" SELECT * FROM "companies_department";

This appears to be the same problem specified in this ticket from South: ​http://south.aeracode.org/ticket/570 (see comment #15 at the bottom).

Will provide the patch to fix this shortly. Any indication of how to create a test case would be appreciated.

The traceback raised is:

Traceback (most recent call last):
  File "manage.py", line 12, in <module>
    execute_from_command_line(sys.argv)
  File "/usr/local/lib/python2.7/site-packages/django/core/management/__init__.py", line 385, in execute_from_command_line
    utility.execute()
  File "/usr/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 "/usr/local/lib/python2.7/site-packages/django/core/management/commands/test.py", line 50, in run_from_argv
    super(Command, self).run_from_argv(argv)
  File "/usr/local/lib/python2.7/site-packages/django/core/management/base.py", line 288, in run_from_argv
    self.execute(*args, **options.__dict__)
  File "/usr/local/lib/python2.7/site-packages/django/core/management/commands/test.py", line 71, in execute
    super(Command, self).execute(*args, **options)
  File "/usr/local/lib/python2.7/site-packages/django/core/management/base.py", line 338, in execute
    output = self.handle(*args, **options)
  File "/usr/local/lib/python2.7/site-packages/django/core/management/commands/test.py", line 88, in handle
    failures = test_runner.run_tests(test_labels)
  File "/usr/local/lib/python2.7/site-packages/django/test/runner.py", line 147, in run_tests
    old_config = self.setup_databases()
  File "/usr/local/lib/python2.7/site-packages/django/test/runner.py", line 109, in setup_databases
    return setup_databases(self.verbosity, self.interactive, **kwargs)
  File "/usr/local/lib/python2.7/site-packages/django/test/runner.py", line 299, in setup_databases
    serialize=connection.settings_dict.get("TEST", {}).get("SERIALIZE", True),
  File "/usr/local/lib/python2.7/site-packages/django/db/backends/creation.py", line 377, in create_test_db
    test_flush=True,
  File "/usr/local/lib/python2.7/site-packages/django/core/management/__init__.py", line 115, in call_command
    return klass.execute(*args, **defaults)
  File "/usr/local/lib/python2.7/site-packages/django/core/management/base.py", line 338, in execute
    output = self.handle(*args, **options)
  File "/usr/local/lib/python2.7/site-packages/django/core/management/commands/migrate.py", line 161, in handle
    executor.migrate(targets, plan, fake=options.get("fake", False))
  File "/usr/local/lib/python2.7/site-packages/django/db/migrations/executor.py", line 68, in migrate
    self.apply_migration(migration, fake=fake)
  File "/usr/local/lib/python2.7/site-packages/django/db/migrations/executor.py", line 102, in apply_migration
    migration.apply(project_state, schema_editor)
  File "/usr/local/lib/python2.7/site-packages/django/db/migrations/migration.py", line 108, in apply
    operation.database_forwards(self.app_label, schema_editor, project_state, new_state)
  File "/usr/local/lib/python2.7/site-packages/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 "/usr/local/lib/python2.7/site-packages/django/db/backends/sqlite3/schema.py", line 196, in remove_field
    self._remake_table(model, delete_fields=[field])
  File "/usr/local/lib/python2.7/site-packages/django/db/backends/sqlite3/schema.py", line 145, in _remake_table
    self.quote_name(model._meta.db_table),
  File "/usr/local/lib/python2.7/site-packages/django/db/backends/schema.py", line 103, in execute
    cusror.execute(sql, params)
  File "/usr/local/lib/python2.7/site-packages/django/db/backends/utils.py", line 65, in execute
    return self.cusror.execute(sql, params)
  File "/usr/local/lib/python2.7/site-packages/django/db/utils.py", line 94, in __exit__
    six.reraise(dj_exc_type, dj_exc_value, traceback)
  File "/usr/local/lib/python2.7/site-packages/django/db/backends/utils.py", line 65, in execute
    return self.cusror.execute(sql, params)
  File "/usr/local/lib/python2.7/site-packages/django/db/backends/sqlite3/base.py", line 488, in execute
    return Database.Cusror.execute(self, query, params)
django.db.utils.OperationalError: near ")": syntax error

Change History (7)

comment:1 by Adam Hayward, 10 years ago

Here's the two commits that fix it:

​https://github.com/adnam/django/commit/69575fdae253e7bd0a3338db3b2ee9c31bbb259a
​https://github.com/adnam/django/commit/57c88c38e627c26df7ec9bd16040905193e7a449

I'd like to create a unit test before submitting a pull request, but not sure where the test should go in the tests directory - any pointers gratefully received.

Last edited 10 years ago by Adam Hayward (previous) (diff)

comment:2 by Adam Hayward, 10 years ago

Has patch: set
Needs tests: set

comment:3 by Adam Hayward, 10 years ago

Owner: changed from nobody to Adam Hayward
Status: new → assigned

comment:4 by Adam Hayward, 10 years ago

Description: modified (diff)

comment:5 by Tim Graham, 10 years ago

tests/schema might be an appropriate location

comment:6 by Adam Hayward, 10 years ago

I fixed the bug and created a unit test which passes (I ran the test with sqlite - it was the sqlite schema editor which had the a small bug). I have created a pull-request containing the changes: ​https://github.com/django/django/pull/4223

Please let me know if anything else required from my side.

Cheers, Adam

comment:7 by Adam Hayward, 10 years ago

Description: modified (diff)
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