One of the most powerful aspects of the Ruby on Rails framework is in the philosophy behind their REST implementation. Forcing people into these 4 actions for 90% of cases makes them think more about their domain model and the establish entities that represent the relationship between tables. See David's keynote for his CRUD discussion for more details of this at http://www.scribemedia.org/2006/07/09/dhh/. You can download his slides further down the page.