will_paginate为Rails提供了非常方便的分页浏览功能。我们将通过一个小例子来展示：
1. 创建工程：
$rails test_will_paginate
$cd test_will_paginate
2. 安装插件：
$script/plugin install svn://errtheblog.com/svn/plugins/will_paginate
3. 生成post模型，并添加测试数据：
$script/generate scaffold post title:string body:text
#db/migrate/001_create_posts.rb
(1..50).each do |num|
Post.create(:title => "title#{num}", :body => "body#{num}")
end
4. 生成数据表：
$rake db:migrate
5. 定义模型默认一页显示的条目数：
#app/models/post.rb
def self.per_page
10
end
6. 修改controller的index方法，使其支持分页：
#app/controllers/posts_controller.rb
def index
@posts = Post.paginate :page => params[:page], :order => 'updated_at DESC'
......
end
7. 调整页面显示：
#app/views/posts/index.html.erb
<%= will_paginate @posts %>
Total entries: <%= @posts.total_entries %>, total pages: <%= @posts.page_count %>, current page: <%= @posts.current_page %>
8. 最后加上will_paginate推荐的css：
#public/stylesheets/scaffold.css
.pagination {
padding: 3px;
margin: 3px;
}
.pagination a {
padding: 2px 5px 2px 5px;
margin: 2px;
border: 1px solid #aaaadd;
text-decoration: none;
color: #000099;
}
.pagination a:hover, .pagination a:active {
border: 1px solid #000099;
color: #000;
}
.pagination span.current {
padding: 2px 5px 2px 5px;
margin: 2px;
border: 1px solid #000099;
font-weight: bold;
background-color: #000099;
color: #FFF;
}
.pagination span.disabled {
padding: 2px 5px 2px 5px;
margin: 2px;
border: 1px solid #eee;
color: #ddd;
}
