Vote counter code...

gistfile1.rb

# post_controller.rb

class PostsController < ApplicationController
  def index
    @posts = Post.find(:all)
  end

  def new
    @post = Post.new
  end

  def create
    @post = Post.new(params[:post])
    
    respond_to do |format|
      if @post.save
        format.html do
          redirect_to root_path, success: "Post saved successfully" 
        end
      else
        format.html { render action: 'index' }
      end
    end
  end

  def show
    # Post 
    @post = Post.find(params[:id])

    # Comments assiciated by :post_id 
    @comments = @post.comments.all
    @comment = @post.comments.build(params[:comment])
    @comment.save
  end

  def edit
  end
end


# votes_controller

class VotesController < ApplicationController
  def create
    # Vote.create(post_id: params[:post_id], vote: params[:vote])
    
    @post = Post.find(params[:post_id])
    @post.votes.create(vote: params[:vote])

    respond_to do |format|
      
      format.html do 
        redirect_to posts_path, success: "HTML says your vote was counted!"
      end
      format.js do
      end
    end
  end
end

# post.rb

class Post < ActiveRecord::Base
  attr_accessible :URL, :description, :is_link

  has_many :comments, dependent: :destroy
  has_many :votes, dependent: :destroy

  def vote_total
    votes.where(vote: true).size - votes.where(vote: false).size

    # votes.increment_counter(:vote, :post_id)
  end
end


# vote.rb

class Vote < ActiveRecord::Base
  attr_accessible :vote, :post_id

  belongs_to :post, dependent: :destroy
end


# posts/index.html.erb

<h5>Posts#index</h5>
<small><i>Find me in app/views/posts/index.html.erb</i></small>
<hr />

<div class="hero hero-unit">
	<button><%= link_to "Create a post", new_post_path %></button>
	<hr />

	<ul class="unstyled">
		<% @posts.each do |post| %>

		<h5><small>post ID: </small><%= post.id %></h5>
		<li><%= post.URL %></li>
		<li>
			<%= link_to post.description, post %>
		</li>
		<li>
			<ul class="unstyled">
				<li><small><i>submitted <%= time_ago_in_words(post.created_at) %> ago.</i></small></li>
			</ul>
		</li>
		<li>
			<%= pluralize(post.comments.count, 'comment') %>
		</li>
		<li>
			<button class="btn btn-mini btn-success">
				<%= link_to '', post_votes_path(post, vote: true), method: :post, remote: true, class: 'icon-arrow-up' %>
			</button>

			<button class="btn btn-mini btn-danger">
				<%= link_to '', post_votes_path(post, vote: false), method: :post, remote: true, class: 'icon-arrow-down' %>
			</button>
			<span id="post_<%= post.id %>_votes"><%= post.vote_total.to_s + " votes" %></span>
		</li>
		<% end %>
		<hr />
	</ul>
</div><!-- END hero, hero-unit CLASS -->