Flask context for RQ jobs (RuntimeError: Working outside of application)

Question

First of all, questions about flask_context including context for RQ jobs seems to be common issue but I searched a lot and still couldn't solve my problem.

My decorator functions (tried both of them in different variations):

def redis_decorator1(f):
    def inner_wrapper(*args, **kwargs):
        # db interactions
        return res
    return inner_wrapper

def redis_decorator2(app):
    # app.app_context().push()
    def wrapper(f):
        def inner_wrapper(*args, **kwargs):
            # db interactions
            return res
        return inner_wrapper
    return wrapper



...
@redis_decorator
def under_decorator_func(*some_args)

In function under_decorator_func is used flask.current_app.

Problems:

First decorator -  RuntimeError: "Working outside of application
context" when redis task starts.

Second decorator - Same error on app start

I also tried app.app_context().push() right after app is created so I have no idea what is going on here.

Answer 1

Turns out solution was quite obvious and required a bit more knowledge about python contexts:

app = create_app() # or anything that creates your Flask application

...


def redis_decorator2(app):
def wrapper(f):
    def inner_wrapper(*args, **kwargs):
        with app.app_context():
            # db interactions
            return res
    return inner_wrapper
return wrapper

Important thing here to use flask context in inner_wrapper function and not any layer above, otherwise you will get same error as before. Hope it will help somebody.