# How does Rails order/prioritorize the class extensions/overr **URL:** \ **Category:** Rails\ **Created:** [September 15, 2006, 1:19pm UTC](https://www.ruby-forum.com/t/how-does-rails-order-prioritorize-the-class-extensions-overr/68784 "2006-09-15T13:19:48Z")\ **Posts on this page:** 1\ **Page:** 1
**Author:** ![greg](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/g/71c47a/32.png) [@greg](https://www.ruby-forum.com/u/greg)\ **Post date:** [September 15, 2006, 1:19pm UTC](https://www.ruby-forum.com/t/how-does-rails-order-prioritorize-the-class-extensions-overr/68784/1 "2006-09-15T13:19:48Z")
Hi, Can anyone summarise (or provide a link) how ruby & rails together perform the class/module loading in terms of the order in which they are performed? For example I have a few plugin’s which I am using which extend some of the core rails classes, so I’m not sure whether these is a potential for a clash here? That is if I have more than one plugin (or module generally) that extended a particular method of a particular rails or ruby class would only 1 of these really work? Which order would it occur in. A flow diagram of how rails approaches loading up classes covering off items such as: ruby classes, rails, plugin classes, engine classes, your own classes. Order of preference for classes within the same category (e.g. what if I defined the same class more than once in my own code base). Tks