Rails：创建RSS提要的最佳实践 - MIME检测与FeedsController

I need several RSS feeds in my app. They are in a way similar to existing actions but with less options (no will_paginate, no sorting, only the most recent 20 results). So for example I have one action which shows all items tagged "amazing" and I also need one feed which shows the latest items tagged "amazing".I need several RSS feeds in my app. They are in