Rails : render and exit immediately

Question

Using the omniauth gem, I am forced to define a single route callback for succesful logins, regardless of the provider :

def auth_callback 

        auth_data =          


        

Answer 1

Why not specifically call render in those methods?

def process_one
 # do something then render view for process_one
 render :process_one and return
end

Rails should detect that you've already run it and not try to render again.