Where to place Rails code that is not a model, view, controller or helper?

Question

I want to share code not related to views between several controllers in my Rails app. Where in the directory structure should I place it?

EDIT: the code in question if something all controllers use to determine how they render the model data

Answer 1

If the code is something like modules with utility methods in these could be placed in the lib folder. Alternatively you could create a common superclass for some of your controllers if they share behaviour.

Please post an example of the kind of code you're thinking of.

Answer 2

If it's "something all controllers use", I would place it in a base class used by all controllers. The "application_controller" comes to mind.