Ruby实践—will_paginate实现分页

开发环境：

OS:Windows XP

Ruby:Ruby1.9.1

Rails:Rails2.3.5

will_paginate:will_paginate2.3.11

(在命令行中运行 gem install mislav-will_paginate --source http://gems.github.com )

IDE:Rubymine2.0.1

DB:mysql5.0.9



本例在上一个例子（Ruby实践—简单数据库操作）的基础上实现分页，利用的是will_paginate插件

一、安装will_paginate

(在命令行中运行 gem install mislav-will_paginate --source http://gems.github.com )



二、修改enviroment.rb

引用"will_paginate"，在

Rails::Initializer.run do |config|

end



之后添加 require 'will_paginate' ，否则运行时报错“method not found 'paginate' ”



三、修改product_controller.rb

修改 index 方法为如下:

def index
   # @products = Product.all
    @products = Product.paginate :page => params[:page]||1, :per_page => 2
    respond_to do |format|
      format.html # index.html.erb
      format.xml  { render :xml => @products }
    end
  end

#注:1是用户以http://localhost:3000/products 显示的第1页的数据;2是每页显示的记录数

@product_pages = Product.paginate :page => params[:page]||1, :per_page => 2



四、修改index.html.erb

添加如下引用

<%= will_paginate @products, :prev_label => 'pre', :next_label => 'next' %>



运行结果：