origo

1.controller
    定义action，指定需要翻页，示例代码：
       def list
          @product_pages, @products = paginate :products, :per_page => 10
       end
     @product_pages记录页数信息，@products每页的集合，每页10条记录
2.view
    <table>
       <tr>
         <% for column in Product.content_columns %>
        <th><%= column.human_name %></th>
         <% end %>
       </tr>
 
       <% for product in @products %>
        <tr>
      <% for column in Product.content_columns %>
    <td><%=h product.send(column.name) %></td>
  <% end %>
  </tr>
<% end %>
</table>

<%= link_to 'Previous page',
       { :page => @product_pages.current.previous } if @product_pages.current.previous %>
<%= link_to 'Next page',
       { :page => @product_pages.current.next } if @product_pages.current.next %>