flask 中xx.init_app(app)方法 _flask

赋料扬雄敌，诗看子建亲。这篇文章主要讲述flask 中xx.init_app(app)方法相关的知识，希望能为你提供帮助。

bootstrap = Bootstrap() mail = Mail() moment = Moment() db = SQLAlchemy() def create_app(config_name): app = Flask(__name__) #将指定的配置通过from_object()方法导入app.config字典配置对象 app.config.from_object(config[config_name]) config[config_name].init_app(app) bootstrap.init_app(app) mail.init_app(app) moment.init_app(app) db.init_app(app)

【flask 中xx.init_app(app)方法】http://flask.pocoo.org/docs/0.12/patterns/appfactories/
flask 文档关于工厂模式里面提到了上面的这种套路。

It ’ s preferable to create your extensions and app factories so that the extension object does not initially get bound to the application.

Using Flask-SQLAlchemy, as an example, you should not do something along those lines:

def create_app(config_filename):
app = Flask(__name__)
app.config.from_pyfile(config_filename)

db = SQLAlchemy(app)

But, rather, in model.py (or equivalent):

db = SQLAlchemy()

and in your application.py (or equivalent):

def create_app(config_filename):
app = Flask(__name__)
app.config.from_pyfile(config_filename)

from yourapplication.model import db
db.init_app(app)