Move to app/assets/Stylesheets/application.css have the following css in your file
.apple_pagination {
background: #f1f1f1;
border: 1px solid #e5e5e5;
text-align: center;
padding: 1em;
cursor: default; }
.apple_pagination a, .apple_pagination span {
padding: 0.2em 0.3em; }
.apple_pagination .disabled {
color: #aaaaaa; }
.apple_pagination .current {
font-style: normal;
font-weight: bold;
background-color: #bebebe;
display: inline-block;
width: 1.4em;
height: 1.4em;
line-height: 1.5;
-moz-border-radius: 1em;
-webkit-border-radius: 1em;
border-radius: 1em;
text-shadow: rgba(255, 255, 255, 0.8) 1px 1px 1px; }
.apple_pagination a {
text-decoration: none;
color: black; }
.apple_pagination a:hover, .apple_pagination a:focus {
text-decoration: underline; }
Move to app/views/index.html.erb
<%= will_paginate @posts ,:class => "apple_pagination"%>
You will find the last page number which is an end.
Also in posts_controller.rb
@posts = Post.order("published_at desc").page(params[:page]).per_page(20)