我正在使用Flask-Alchemy构建一个GAE Flask应用程序,与Cloud SQL一起运行dev_appserver
测试应用程序。
然而,如果我将SQLALCHEMY_DATABASE_URI
设置为mysql+gaerdbms:///appname?instance=instanceid
URL,在尝试调用db.create_all()
时,会出现以下回溯信息:
Traceback (most recent call last):
# earlier lines omitted for brevity
File "/Project/app/foo.bar/foo/bar/admin/__init__.py", line 26, in init_db
db.create_all()
File "/Project/app/distlib/flask_sqlalchemy/__init__.py", line 856, in create_all
self._execute_for_all_tables(app, bind, 'create_all')
File "/Project/app/distlib/flask_sqlalchemy/__init__.py", line 848, in _execute_for_all_tables
op(bind=self.get_engine(app, bind), tables=tables)
File "/Project/app/distlib/flask_sqlalchemy/__init__.py", line 797, in get_engine
return connector.get_engine()
File "/Project/app/distlib/flask_sqlalchemy/__init__.py", line 473, in get_engine
self._engine = rv = sqlalchemy.create_engine(info, **options)
File "/Project/app/distlib/sqlalchemy/engine/__init__.py", line 332, in create_engine
return strategy.create(*args, **kwargs)
File "/Project/app/distlib/sqlalchemy/engine/strategies.py", line 69, in create
dialect = dialect_cls(**dialect_args)
File "/Project/app/distlib/sqlalchemy/dialects/mysql/base.py", line 1986, in __init__
default.DefaultDialect.__init__(self, **kwargs)
File "/Project/app/distlib/sqlalchemy/engine/default.py", line 124, in __init__
self.paramstyle = self.dbapi.paramstyle
AttributeError: 'module' object has no attribute 'paramstyle'
怎么回事?为什么(DB-API 2.0要求的)paramstyle
属性不见了?