Sometime you want to add Next or Previous links to your blog posts or whatever model. Its really easy, just add a couple of instance methods to your model
class Post < ActiveRecord::Base
def next
Post.where("id > ?", id).limit(1).first
end
def prev
Post.where("id < ?", id).limit(1).first
end
end
Then just call it like so:
<%= link_to "Next Post", @post.next %>
<%= link_to "Prev Post", @post.prev %>