我正在通过分散模型、蓝图来重构我的 Flask 应用程序,但遇到运行时错误。
def create_app():
app = flask.Flask("app")
app.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite://'
app.register_blueprint(api)
db.init_app(app)
db.create_all()
return app
我有以下问题(示例项目托管在这里:https://github.com/chfw/sample):
Traceback (most recent call last):
File "application.py", line 17, in <module>
app = create_app()
File "application.py", line 12, in create_app
db.create_all()
File "\AppData\Roaming\Python\Python27\site-packages\flask_sqlalchemy\__init__.py", line 856, in create_all
self._execute_for_all_tables(app, bind, 'create_all')
File "\AppData\Roaming\Python\Python27\site-packages\flask_sqlalchemy\__init__.py", line 836, in _execute_for_all_tables
app = self.get_app(app)
File "\AppData\Roaming\Python\Python27\site-packages\flask_sqlalchemy\__init__.py", line 809, in get_app
raise RuntimeError('application not registered on db
'RuntimeError: application not registered on db
instance and no application bound to current context
我对这个主题进行了研究。这里建议重构:
Flask-SQLAlchemy 导入/上下文问题
这里提出了同样的问题:
http://flask.pocoo.org/mailinglist/archive/2010/8/30/sqlalchemy-init-app-problem/#b1c3beb68573efef4d6e571ebc68fa0b
上面的线程(2010)建议了这样的黑客攻击:
app.register_blueprint(api)
db.app=app #<------------<<
db.init_app(app)
有谁知道如何正确执行此操作?你是怎么解决的?
Thanks