Skinny Controller, Fat Model

@0s_and_1s check this: - it's about Rails but applies to other languages/framework,s controller usually delegate work

Excellent write-up in helping beginners understand the principles of Rails. Keep’m coming! As Christoffer said, pseudo_id could be a helper, I think it fits fine in the model. I’m sometimes unsure whether to put little functions like that as part of the model or as a helper. Personally, I think helpers are better for things that are used beyond one particular model. However, I do find myself wondering whether I should put a helper that applies to a particular controller only in the controller file itself or in the helper file tied to the controller. I sometimes wonder whether the controller-specific helper files aren’t redundant, and that those helpers which are controller-specific should go in the controller, with those that are global in the application_helper file. Then you don’t have to look in both the controller and its helper file for stuff. (Same for models.)

Full article: http://weblog.jamisbuck.org/2006/10/18/skinny-controller-...