Decorators run before function it is decorating is called?

Question

As an example:

def get_booking(f=None):
    print "Calling get_booking Decorator"
    def wrapper(request, **kwargs):
        booking = _get_booking         


        

Answer 1

python decorators are functions applied to a function to transform it:

@my_decorator
def function (): ...

is like doing this:

def function():...
function = my_decorator(function)

What you want to do is:

def get_booking(f=None):
    def wrapper(request, **kwargs):
        print "Calling get_booking Decorator"
        booking = _get_booking_from_session(request)
        if booking == None:
            # we don't have a booking in our session.
            return HttpRedirect('/')
        else:
            return f(request=request, booking=booking, **kwargs)
    return wrapper