如何在维护searchlogic功能的同时覆盖/添加method_missing？

Question

I want to add some behavior to my model when method_missing is thrown, but I know searchlogic already uses that for their named search scopes.

What is the proper way to extend method_missing functionality? Is there a way to react to a method_missing trigger? Much like how one would bind functions to events in javascript?

Answer 1

when you say you want something to happen when method missing is thrown, do you mean every time or just when search logic didn't find something? The former is quite simple:

def method_missing(name, *)
  if name =~ /foo/i
    # call your custom method
    # or for example define_method
  else
    # you do not want to handle the
    # method, so fall back to standard behavior
    super
  end
end

Where you replace name =~ /foo/i with a condition that checks whether you want to handle the missing method or not. The latter is not as easy. I can't answer it, because i do not know search logic, but you'd have to check whether search logic found something or not before calling your custom method.