Classe « Scaffold »

Méthode flask.blueprints.Scaffold.before_request

Signature de la méthode before_request

def before_request(self, f: Callable[[], Union[ForwardRef('Response'), ~AnyStr, Dict[str, Any], Generator[~AnyStr, NoneType, NoneType], Tuple[Union[ForwardRef('Response'), ~AnyStr, Dict[str, Any], Generator[~AnyStr, NoneType, NoneType]], Union[ForwardRef('Headers'), Dict[str, Union[str, List[str], Tuple[str, ...]]], List[Tuple[str, Union[str, List[str], Tuple[str, ...]]]]]], Tuple[Union[ForwardRef('Response'), ~AnyStr, Dict[str, Any], Generator[~AnyStr, NoneType, NoneType]], int], Tuple[Union[ForwardRef('Response'), ~AnyStr, Dict[str, Any], Generator[~AnyStr, NoneType, NoneType]], int, Union[ForwardRef('Headers'), Dict[str, Union[str, List[str], Tuple[str, ...]]], List[Tuple[str, Union[str, List[str], Tuple[str, ...]]]]]], ForwardRef('WSGIApplication'), NoneType]]) -> Callable[[], Union[ForwardRef('Response'), ~AnyStr, Dict[str, Any], Generator[~AnyStr, NoneType, NoneType], Tuple[Union[ForwardRef('Response'), ~AnyStr, Dict[str, Any], Generator[~AnyStr, NoneType, NoneType]], Union[ForwardRef('Headers'), Dict[str, Union[str, List[str], Tuple[str, ...]]], List[Tuple[str, Union[str, List[str], Tuple[str, ...]]]]]], Tuple[Union[ForwardRef('Response'), ~AnyStr, Dict[str, Any], Generator[~AnyStr, NoneType, NoneType]], int], Tuple[Union[ForwardRef('Response'), ~AnyStr, Dict[str, Any], Generator[~AnyStr, NoneType, NoneType]], int, Union[ForwardRef('Headers'), Dict[str, Union[str, List[str], Tuple[str, ...]]], List[Tuple[str, Union[str, List[str], Tuple[str, ...]]]]]], ForwardRef('WSGIApplication'), NoneType]] 

Description

before_request.__doc__

Register a function to run before each request.

        For example, this can be used to open a database connection, or
        to load the logged in user from the session.

        .. code-block:: python

            @app.before_request
            def load_user():
                if "user_id" in session:
                    g.user = db.session.get(session["user_id"])

        The function will be called without any arguments. If it returns
        a non-``None`` value, the value is handled as if it was the
        return value from the view, and further request handling is
        stopped.