Opened 10 years ago

Last modified 10 years ago

#23541 closed Uncategorized

RunSQL Bug Django 1.7 — at Version 2

Reported by: Aryeh Hillman Owned by: nobody
Component: Migrations Version: 1.7
Severity: Normal Keywords: migrations runsql postgresql
Cc: Triage Stage: Unreviewed
Has patch: no Needs documentation: no
Needs tests: no Patch needs improvement: no
Easy pickings: no UI/UX: no

Description (last modified by Aryeh Hillman)

Django migrations are wonderful, but I have found a bug. Here's how to reproduce (there is probably a more minimal case):

  1. Install this function at a shell for PostgreSQL
CREATE FUNCTION exec(text) returns text language plpgsql volatile
  AS $f$
    BEGIN
      EXECUTE $1;
      RETURN $1;
    END;
$f$;

source: http://wiki.postgresql.org/wiki/Dynamic_DDL

  1. Write a RunSQL operation to help rename some tables
class Migration(migrations.Migration):
...
    operations = [
        migrations.RunPython(
            code=x
        ),
        migrations.RunSQL(
            sql="""select exec(format('alter table %I rename to %I', tablename, regexp_replace(tablename, '^hello, 'goodbye'))) from pg_tables where tablename like 'hello%';"""
        ),
    ]
...
  1. Run the migration. I got this error:
Traceback (most recent call last):
  File "./manage.py", line 10, in <module>
    execute_from_command_line(sys.argv)
  File "/Users/abhillman/stable_env/lib/python2.7/site-packages/django/core/management/__init__.py", line 385, in execute_from_command_line
    utility.execute()
  File "/Users/abhillman/stable_env/lib/python2.7/site-packages/django/core/management/__init__.py", line 377, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "/Users/abhillman/stable_env/lib/python2.7/site-packages/django/core/management/base.py", line 288, in run_from_argv
    self.execute(*args, **options.__dict__)
  File "/Users/abhillman/stable_env/lib/python2.7/site-packages/django/core/management/base.py", line 338, in execute
    output = self.handle(*args, **options)
  File "/Users/abhillman/stable_env/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 "/Users/abhillman/stable_env/lib/python2.7/site-packages/django/db/migrations/executor.py", line 63, in migrate
    self.apply_migration(migration, fake=fake)
  File "/Users/abhillman/stable_env/lib/python2.7/site-packages/django/db/migrations/executor.py", line 97, in apply_migration
    migration.apply(project_state, schema_editor)
  File "/Users/abhillman/stable_env/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 "/Users/abhillman/stable_env/lib/python2.7/site-packages/django/db/migrations/operations/special.py", line 69, in database_forwards
    schema_editor.execute(statement)
  File "/Users/abhillman/stable_env/lib/python2.7/site-packages/django/db/backends/schema.py", line 98, in execute
    cursor.execute(sql, params)
  File "/Users/abhillman/stable_env/lib/python2.7/site-packages/django/db/backends/utils.py", line 81, in execute
    return super(CursorDebugWrapper, self).execute(sql, params)
  File "/Users/abhillman/stable_env/lib/python2.7/site-packages/django/db/backends/utils.py", line 65, in execute
    return self.cursor.execute(sql, params)
IndexError: list index out of range

Not sure what's going on here. Could it be the custom PGSQL function?

Change History (2)

comment:1 by Aryeh Hillman, 10 years ago

Description: modified (diff)

comment:2 by Aryeh Hillman, 10 years ago

Description: modified (diff)
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