Question

I have many different classes under /lib/ folder with many actions.

Before saving an object I need to call a method from a class that matches its name with an attribute inside the object i.e. given this

User.gateway = "something"

I need to call myfunction from something class before the object is saved.

Not sure how to do this.

Answer 1

your question is quite ambiguous,is this what you need?

# user.rb
before_save :myfunction

protected

def myfunction
   g = self.gateway
   case g 
   when String | Symbol 
     begin
       g.classify.constantize.myfunction
     rescue NameError
       # if there is no something class
     end
   else
     # no good value
   end
end

    enter code here