pycharm shell in the context of database operation error error RuntimeError: No application found context.

This article is resolved pycharm in python shell operation of the database error: RuntimeError:. No application found Either work inside a view function or push an application context.

init file:

def create_app(config_name):
    app = Flask(__name__)
    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)
    login_manager.init_app(app)

    from .main import main as main_blueprint
    app.register_blueprint(main_blueprint)

    from .auth import auth as auth_blueprint
    app.register_blueprint(auth_blueprint,url_prefix='/auth')

    app.app_context().push()

    return app

manage.py file:

app = create_app(os.getenv('FLASK_CONFIG') or 'default')
if __name__ == '__main__':
    manager.run()

pycharm in interactive python shell as follows:

from app import create_app,db
db.drop_all()

Given the information as follows:

Traceback (most recent call last):
  File "<input>", line 1, in <module>
  File "/Users/chen/PycharmProjects/flask_cp7/lib/python3.6/site-packages/flask_sqlalchemy/__init__.py", line 971, in drop_all
    self._execute_for_all_tables(app, bind, 'drop_all')
  File "/Users/chen/PycharmProjects/flask_cp7/lib/python3.6/site-packages/flask_sqlalchemy/__init__.py", line 940, in _execute_for_all_tables
    app = self.get_app(app)
  File "/Users/chen/PycharmProjects/flask_cp7/lib/python3.6/site-packages/flask_sqlalchemy/__init__.py", line 912, in get_app
    'No application found. Either work inside a view function or push'
RuntimeError: No application found. Either work inside a view function or push an application context. 

Photo:

We know from the error message, this error is caused due to the view and context, after extensive searching I found that many online methods are not desirable, but there is a way is correct (correct is relative, escape).

Method: app added in python shell context:

1、app=create_app('development')

2、app.app_context().push()

Results are as follows:

Once you have the context, we can operate the database.

Reference: https://github.com/gnu4cn/flaskLearnings/blob/master/10_flask-SQLAlchemy.md