AttributeError: 'str' 对象在 django 迁移迁移中没有属性 'state_forwards'。RunSQL(



对于不同的模型,我正在尝试将postgres表的自动生成id设置为10000的起始值。我使用了这篇文章,并做了以下工作:

python3 manage.py makemigrations core --empty

然后在迁移中,我添加了:

operations = [
migrations.RunSQL(
"ALTER SEQUENCE CORE_ORG_id_seq RESTART WITH 10000",
"ALTER SEQUENCE CORE_USER_id_seq RESTART WITH 10000",
"ALTER SEQUENCE CORE_PARTLISTING_id_seq RESTART WITH 1000",
"ALTER SEQUENCE CORE_BOMITEM_id_seq RESTART WITH 1000",
"ALTER SEQUENCE CORE_MANUFACTURER_id_seq RESTART WITH 1000;"
),
migrations.RunSQL(
"ALTER SEQUENCE CORE_BOM_id_seq RESTART WITH 1000",
"ALTER SEQUENCE CORE_SPECIFICPART_id_seq RESTART WITH 10000",
"ALTER SEQUENCE CORE_GENERICPART_id_seq RESTART WITH 10000;"
),
]

我把这些放在两行,因为我得到了一个错误,__init.py__只能接受6个命令btw.

当我在上面运行migrate时,我得到:

File "manage.py", line 21, in <module>
main()
File "manage.py", line 17, in main
execute_from_command_line(sys.argv)
File "/Users/myname/.local/share/virtualenvs/mobiusAPI-NVQT3lgx/lib/python3.8/site-packages/django/core/management/__init__.py", line 401, in execute_from_command_line
utility.execute()
File "/Users/myname/.local/share/virtualenvs/mobiusAPI-NVQT3lgx/lib/python3.8/site-packages/django/core/management/__init__.py", line 395, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File "/Users/myname/.local/share/virtualenvs/mobiusAPI-NVQT3lgx/lib/python3.8/site-packages/django/core/management/base.py", line 330, in run_from_argv
self.execute(*args, **cmd_options)
File "/Users/myname/.local/share/virtualenvs/mobiusAPI-NVQT3lgx/lib/python3.8/site-packages/django/core/management/base.py", line 371, in execute
output = self.handle(*args, **options)
File "/Users/myname/.local/share/virtualenvs/mobiusAPI-NVQT3lgx/lib/python3.8/site-packages/django/core/management/base.py", line 85, in wrapped
res = handle_func(*args, **kwargs)
File "/Users/myname/.local/share/virtualenvs/mobiusAPI-NVQT3lgx/lib/python3.8/site-packages/django/core/management/commands/migrate.py", line 243, in handle
post_migrate_state = executor.migrate(
File "/Users/myname/.local/share/virtualenvs/mobiusAPI-NVQT3lgx/lib/python3.8/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 "/Users/myname/.local/share/virtualenvs/mobiusAPI-NVQT3lgx/lib/python3.8/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 "/Users/myname/.local/share/virtualenvs/mobiusAPI-NVQT3lgx/lib/python3.8/site-packages/django/db/migrations/executor.py", line 227, in apply_migration
state = migration.apply(state, schema_editor)
File "/Users/myname/.local/share/virtualenvs/mobiusAPI-NVQT3lgx/lib/python3.8/site-packages/django/db/migrations/migration.py", line 114, in apply
operation.state_forwards(self.app_label, project_state)
File "/Users/myname/.local/share/virtualenvs/mobiusAPI-NVQT3lgx/lib/python3.8/site-packages/django/db/migrations/operations/special.py", line 101, in state_forwards
state_operation.state_forwards(app_label, state)
AttributeError: 'str' object has no attribute 'state_forwards'

我还尝试在我的psqlshell中单独运行这些命令,它们可以工作,所以我不认为这是模型或表的问题。不过,我想把它放在我的迁移中,这样我就可以确保如果另一个人设置了本地数据库,就会发生这种情况。什么是state_forwards?为什么会出现此错误?

谢谢你的帮助!

只有RunSql参数中的第一个参数是查询。

签名为:RunSQL(sql, reverse_sql=None, state_operations=None, hints=None, elidable=False)

因此,您将第三个查询传递为state_operation,它需要一个操作列表。

每个查询需要有1个RunSql,或者根据文档,传递一个sql查询数组:

operations = [
migrations.RunSQL([
"QUERY1",
"QUERY2",
...
])
]

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