I have a view for a controller called \"show\". Inside that view, i want to render the contents of another controller\'s view - and obviously, the logic for the form on that vi
If you really want to render entirely another action (i.e. simulating a request to go through the entire Ruby on Rails stack), you can use Webrat (check Webrat screencast here).
In traditional MVC web applications, you should rarely have a need to do this. But in my experience developing SOFEA-style and micro-architecture webapps, this is getting more and more common.