How can I update this vote counter dynamically with Ajax/JavaScript (Rails)?

Question

I built a simple voting system:

votes_controller.rb:

class VotesController < ApplicationController
  def vote_up
    @post = Post         


        

Answer 1

First put make a wrapper div for show.html.erb

<div class='post-<%=@post.id%>' >
 <h3><%= @post.votes.count %> votes</h3><br />
 <%= link_to "Vote Up", vote_up_path(@post), :remote => true %>
</div>

and in vote_up.js.erb

$("post-<%=@post.id%>").html('<%=escape_javascript @post.votes.count %>');

or something like this