Django+SQL server migrate 解决KeyError: ‘deferrable‘ 错误

(venv) D:\996\Django\MM1_engine>python manage.py migrate
Operations to perform:
  Apply all migrations: admin, auth, contenttypes, sessions
Running migrations:
  Applying auth.0008_alter_user_username_max_length...Traceback (most recent call last):
  File "manage.py", line 22, in <module>
    main()
  File "manage.py", line 18, in main
    execute_from_command_line(sys.argv)
  File "D:\996\Django\MM1_engine\venv\lib\site-packages\django\core\management\__init__.py", line 401, in execute_from_command_line
    utility.execute()
  File "D:\996\Django\MM1_engine\venv\lib\site-packages\django\core\management\__init__.py", line 395, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "D:\996\Django\MM1_engine\venv\lib\site-packages\django\core\management\base.py", line 330, in run_from_argv
    self.execute(*args, **cmd_options)
  File "D:\996\Django\MM1_engine\venv\lib\site-packages\django\core\management\base.py", line 371, in execute
    output = self.handle(*args, **options)
  File "D:\996\Django\MM1_engine\venv\lib\site-packages\django\core\management\base.py", line 85, in wrapped
    res = handle_func(*args, **kwargs)
  File "D:\996\Django\MM1_engine\venv\lib\site-packages\django\core\management\commands\migrate.py", line 243, in handle
    post_migrate_state = executor.migrate(
  File "D:\996\Django\MM1_engine\venv\lib\site-packages\django\db\migrations\executor.py", line 117, in migrate
    state = self._migrate_all_forwards(state, plan, full_plan, fake=fake, fake_initial=fake_initial)
  File "D:\996\Django\MM1_engine\venv\lib\site-packages\django\db\migrations\executor.py", line 147, in _migrate_all_forwards
    state = self.apply_migration(state, migration, fake=fake, fake_initial=fake_initial)
  File "D:\996\Django\MM1_engine\venv\lib\site-packages\django\db\migrations\executor.py", line 227, in apply_migration
    state = migration.apply(state, schema_editor)
  File "D:\996\Django\MM1_engine\venv\lib\site-packages\django\db\migrations\migration.py", line 124, in apply
    operation.database_forwards(self.app_label, schema_editor, old_state, project_state)
  File "D:\996\Django\MM1_engine\venv\lib\site-packages\django\db\migrations\operations\fields.py", line 236, in database_forwards
    schema_editor.alter_field(from_model, from_field, to_field)
  File "D:\996\Django\MM1_engine\venv\lib\site-packages\django\db\backends\base\schema.py", line 571, in alter_field
    self._alter_field(model, old_field, new_field, old_type, new_type,
  File "D:\996\Django\MM1_engine\venv\lib\site-packages\sql_server\pyodbc\schema.py", line 479, in _alter_field
    self.execute(self._create_unique_sql(model, columns=[old_field.column]))
  File "D:\996\Django\MM1_engine\venv\lib\site-packages\sql_server\pyodbc\schema.py", line 861, in execute
    sql = str(sql)
  File "D:\996\Django\MM1_engine\venv\lib\site-packages\django\db\backends\ddl_references.py", line 200, in __str__
    return self.template % self.parts
KeyError: 'deferrable'

(venv) D:\996\Django\MM1_engine>
(venv) D:\996\Django\MM1_engine>py manage.py startapp ddd

(venv) D:\996\Django\MM1_engine>python manage.py makemigrations
No changes detected

(venv) D:\996\Django\MM1_engine>python manage.py migrate
Operations to perform:
  Apply all migrations: admin, auth, contenttypes, sessions
Running migrations:
  Applying auth.0008_alter_user_username_max_length...Traceback (most recent call last):
  File "manage.py", line 22, in <module>
    main()
  File "manage.py", line 18, in main
    execute_from_command_line(sys.argv)
  File "D:\996\Django\MM1_engine\venv\lib\site-packages\django\core\management\__init__.py", line 401, in execute_from_command_line
    utility.execute()
  File "D:\996\Django\MM1_engine\venv\lib\site-packages\django\core\management\__init__.py", line 395, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "D:\996\Django\MM1_engine\venv\lib\site-packages\django\core\management\base.py", line 330, in run_from_argv
    self.execute(*args, **cmd_options)
  File "D:\996\Django\MM1_engine\venv\lib\site-packages\django\core\management\base.py", line 371, in execute
    output = self.handle(*args, **options)
  File "D:\996\Django\MM1_engine\venv\lib\site-packages\django\core\management\base.py", line 85, in wrapped
    res = handle_func(*args, **kwargs)
  File "D:\996\Django\MM1_engine\venv\lib\site-packages\django\core\management\commands\migrate.py", line 243, in handle
    post_migrate_state = executor.migrate(
  File "D:\996\Django\MM1_engine\venv\lib\site-packages\django\db\migrations\executor.py", line 117, in migrate
    state = self._migrate_all_forwards(state, plan, full_plan, fake=fake, fake_initial=fake_initial)
  File "D:\996\Django\MM1_engine\venv\lib\site-packages\django\db\migrations\executor.py", line 147, in _migrate_all_forwards
    state = self.apply_migration(state, migration, fake=fake, fake_initial=fake_initial)
  File "D:\996\Django\MM1_engine\venv\lib\site-packages\django\db\migrations\executor.py", line 227, in apply_migration
    state = migration.apply(state, schema_editor)
  File "D:\996\Django\MM1_engine\venv\lib\site-packages\django\db\migrations\migration.py", line 124, in apply
    operation.database_forwards(self.app_label, schema_editor, old_state, project_state)
  File "D:\996\Django\MM1_engine\venv\lib\site-packages\django\db\migrations\operations\fields.py", line 236, in database_forwards
    schema_editor.alter_field(from_model, from_field, to_field)
  File "D:\996\Django\MM1_engine\venv\lib\site-packages\django\db\backends\base\schema.py", line 571, in alter_field
    self._alter_field(model, old_field, new_field, old_type, new_type,
  File "D:\996\Django\MM1_engine\venv\lib\site-packages\sql_server\pyodbc\schema.py", line 479, in _alter_field
    self.execute(self._create_unique_sql(model, columns=[old_field.column]))
  File "D:\996\Django\MM1_engine\venv\lib\site-packages\sql_server\pyodbc\schema.py", line 861, in execute
    sql = str(sql)
  File "D:\996\Django\MM1_engine\venv\lib\site-packages\django\db\backends\ddl_references.py", line 200, in __str__
    return self.template % self.parts
KeyError: 'deferrable' 

Django+SQL server migrate 出现 KeyError: ‘deferrable’ 错误

今天学session的时候遇到该问题

爬了一圈，最终问题应该在 django-mssql-backend 2.8.1与Django 3.1 未兼容所导致
将使用Django3.0即可解决问题。

本文地址：https://blog.csdn.net/m0_46227797/article/details/108252810