AttributeError：'str‘对象没有带有django迁移migrations.RunSQL的属性'state_forwards’(
AttributeError：'str‘对象没有带有django迁移migrations.RunSQL的属性'state_forwards’(
提问于 2020-09-03 04:49:20
我正在尝试将postgres表自动生成的id设置为不同型号的起始值10000。我使用了this article并执行了以下操作：
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;"
),
]我将它们放在两个单独的行中，因为我得到了一个错误，__init.py__只能接受6个命令。
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psql shell中单独运行这些命令，它们可以正常工作，所以我不认为这是模型或表的问题。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建立了一个本地数据库，就会发生这种情况。什么是state_forwards any，为什么会出现这个错误？
谢谢你的帮忙!
回答 1
Stack Overflow用户
回答已采纳
发布于 2020-09-03 04:54:25
只有第一个RunSql参数是查询。
签名是:RunSQL(sql, reverse_sql=None, state_operations=None, hints=None, elidable=False)
因此，您将第三个查询作为state_operation传递，该查询需要一个操作列表。
您需要为每个查询提供一个RunSql，或者根据文档，传递一组sql查询：
operations = [
migrations.RunSQL([
"QUERY1",
"QUERY2",
...
])
]页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/63713347
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