Migration error on MySql #2
Description
- django_private_chat2 version: 2 0.1.2
- Django version: 3.1.7
- Python version: 3.8
- Operating System: W10 20h2
Description
Giving errors in the third migration.
Applying django_private_chat2.0003_auto_20210323_1410...Traceback (most recent call last):
File "C:\Users\Yunus\PycharmProjects\yeye\venv\lib\site-packages\django\db\backends\utils.py", line 84, in _execute
return self.cursor.execute(sql, params)
File "C:\Users\Yunus\PycharmProjects\yeye\venv\lib\site-packages\django\db\backends\mysql\base.py", line 73, in exec
ute
return self.cursor.execute(query, args)
File "C:\Users\Yunus\PycharmProjects\yeye\venv\lib\site-packages\MySQLdb\cursors.py", line 209, in execute
res = self._query(query)
File "C:\Users\Yunus\PycharmProjects\yeye\venv\lib\site-packages\MySQLdb\cursors.py", line 315, in _query
db.query(q)
File "C:\Users\Yunus\PycharmProjects\yeye\venv\lib\site-packages\MySQLdb\connections.py", line 239, in query
_mysql.connection.query(self, query)
MySQLdb._exceptions.OperationalError: (1553, "Cannot drop index 'Unique dialog': needed in a foreign key constraint")
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
File "manage.py", line 22, in
main()
File "manage.py", line 18, in main
execute_from_command_line(sys.argv)
File "C:\Users\Yunus\PycharmProjects\yeye\venv\lib\site-packages\django\core\management_init_.py", line 401, in e
xecute_from_command_line
utility.execute()
File "C:\Users\Yunus\PycharmProjects\yeye\venv\lib\site-packages\django\core\management_init_.py", line 395, in e
xecute
self.fetch_command(subcommand).run_from_argv(self.argv)
File "C:\Users\Yunus\PycharmProjects\yeye\venv\lib\site-packages\django\core\management\base.py", line 330, in run_f
rom_argv
self.execute(*args, **cmd_options)
File "C:\Users\Yunus\PycharmProjects\yeye\venv\lib\site-packages\django\core\management\base.py", line 371, in execu
te
output = self.handle(*args, **options)
File "C:\Users\Yunus\PycharmProjects\yeye\venv\lib\site-packages\django\core\management\base.py", line 85, in wrappe
d
res = handle_func(*args, **kwargs)
File "C:\Users\Yunus\PycharmProjects\yeye\venv\lib\site-packages\django\core\management\commands\migrate.py", line 2
43, in handle
post_migrate_state = executor.migrate(
File "C:\Users\Yunus\PycharmProjects\yeye\venv\lib\site-packages\django\db\migrations\executor.py", line 117, in mig
rate
state = self._migrate_all_forwards(state, plan, full_plan, fake=fake, fake_initial=fake_initial)
File "C:\Users\Yunus\PycharmProjects\yeye\venv\lib\site-packages\django\db\migrations\executor.py", line 147, in _mi
grate_all_forwards
state = self.apply_migration(state, migration, fake=fake, fake_initial=fake_initial)
File "C:\Users\Yunus\PycharmProjects\yeye\venv\lib\site-packages\django\db\migrations\executor.py", line 227, in app
ly_migration
state = migration.apply(state, schema_editor)
File "C:\Users\Yunus\PycharmProjects\yeye\venv\lib\site-packages\django\db\migrations\migration.py", line 124, in ap
ply
operation.database_forwards(self.app_label, schema_editor, old_state, project_state)
File "C:\Users\Yunus\PycharmProjects\yeye\venv\lib\site-packages\django\db\migrations\operations\models.py", line 84
3, in database_forwards
schema_editor.remove_constraint(model, constraint)
File "C:\Users\Yunus\PycharmProjects\yeye\venv\lib\site-packages\django\db\backends\base\schema.py", line 368, in re
move_constraint
self.execute(sql)
File "C:\Users\Yunus\PycharmProjects\yeye\venv\lib\site-packages\django\db\backends\base\schema.py", line 142, in ex
ecute
cursor.execute(sql, params)
File "C:\Users\Yunus\PycharmProjects\yeye\venv\lib\site-packages\django\db\backends\utils.py", line 98, in execute
return super().execute(sql, params)
File "C:\Users\Yunus\PycharmProjects\yeye\venv\lib\site-packages\django\db\backends\utils.py", line 66, in execute
return self._execute_with_wrappers(sql, params, many=False, executor=self._execute)
File "C:\Users\Yunus\PycharmProjects\yeye\venv\lib\site-packages\django\db\backends\utils.py", line 75, in execute
with_wrappers
return executor(sql, params, many, context)
File "C:\Users\Yunus\PycharmProjects\yeye\venv\lib\site-packages\django\db\backends\utils.py", line 84, in _execute
return self.cursor.execute(sql, params)
File "C:\Users\Yunus\PycharmProjects\yeye\venv\lib\site-packages\django\db\utils.py", line 90, in exit
raise dj_exc_value.with_traceback(traceback) from exc_value
File "C:\Users\Yunus\PycharmProjects\yeye\venv\lib\site-packages\django\db\backends\utils.py", line 84, in _execute
return self.cursor.execute(sql, params)
File "C:\Users\Yunus\PycharmProjects\yeye\venv\lib\site-packages\django\db\backends\mysql\base.py", line 73, in exec
ute
return self.cursor.execute(query, args)
File "C:\Users\Yunus\PycharmProjects\yeye\venv\lib\site-packages\MySQLdb\cursors.py", line 209, in execute
res = self._query(query)
File "C:\Users\Yunus\PycharmProjects\yeye\venv\lib\site-packages\MySQLdb\cursors.py", line 315, in _query
db.query(q)
File "C:\Users\Yunus\PycharmProjects\yeye\venv\lib\site-packages\MySQLdb\connections.py", line 239, in query
_mysql.connection.query(self, query)
django.db.utils.OperationalError: (1553, "Cannot drop index 'Unique dialog': needed in a foreign key constraint")
What I Did
I just tried to migrate after the setup.