在rails中使用jquery实现Ajax
下面通过一个实例来讲解如何在Rails用jquery实现Ajax式的添加和删除操作.
我的环境:
ruby187,rails 222,jquery1.3.2, jquery.form.js
首先新建rails应用
rails app -d mysql
新建数据库app_development
script/generate model product name:string
script/generate controller products index
rake db:migrate
把jquery.js和jquery.form.js放到public/javascripts目录下
编辑app/app/views/layouts/application.html.erb
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
<title>Application</title>
<meta http-equiv="Content-type" content="text/html; charset=utf-8">
<title>index</title>
<%= javascript_include_tag "jquery" %>
<%= javascript_include_tag "jquery.form" %>
<%= javascript_include_tag "application" %>
</head>
<body>
<%= yield %>
</body>
</html>
在products_controller.rb中定义下面几个action:
class ProductsController < ApplicationController
def index
@products = Product.find(:all)
end
def create
if Product.create(params[:product]).valid?
@products = Product.find(:all)
render :partial => "products_list"
else
render :text => "something wrong", :status => "500"
end
end
def delete
Product.destroy(params[:id])
@products = Product.find(:all)
render :text => ""
end
end
编辑app/app/views/products/index.html.erb
<% form_for :product,:html=>{:method=>"post",:id=>"create-product"},:url=>{:controller=>"products", :action=>"create"} do |f|%>
<label>Product Name:<%= f.text_field :name %></label>
<%= submit_tag "submit" %>
<% end %>
<div id="products-list">
<%= render :partial => 'products_list'%>
</div>
编辑app/app/views/products/_products_list.erb
<% unless @products.empty? %>
<table>
<tr>
<th><b>Product Name</b></th>
</tr>
<% @products.each do |product| %>
<tr>
<td>
<%= product.name%>
</td>
<td><%= link_to "Delete", {:controller=>"products",:action=>"delete",:id=>product},:class=>"delete"%></td>
<td>Edit</td>
</tr>
<% end %>
</table>
<% end %>
编辑public/javascripts/application.js
DeleteProduct()是用jquery实现的ajax方式.
CreateProduct()用到了jquery.formAjax提交方式
$(document).ready(function() {
function DeleteProduct() { //定义删除函数
$('#products-list a.delete').bind('click', function() {//将delete链接与click绑定
var deleteLink = $(this) //将这个链接的dom赋值给deleteLink变量
$.ajax({ //Ajax函数
type: 'delete', //定义http方法
url: deleteLink.attr('href'), //请求的URL
success: function(){deleteLink.parent().parent().remove()} //请求成功之后的动作
})
return false//阻止普通的提交方式和页面导航
})
}
function CreateProduct() {//添加product函数
$('#create-product').submit(function() {//点击submit的函数
$(this).ajaxSubmit({//点击submit发起ajax请求
target: '#products-list', //目标是对id=product0list的dom进行局部更新
clearForm: true,
success: DeleteProduct,
error: displayError//发生错误,譬如validate?为false时
})
return false
})
}
function displayError(request, errorType) {
var msg = '<div class="error">'+request.responseText+'(click to close)</div>'
$('#products-list').append(msg)
$('.error').click(function(){$(this).hide()})
}
$(function() {
DeleteProduct()
CreateProduct()
})
});jquery.form.js的更多内容参阅API
现在启动服务 script/server
就可以看到用Ajax实现的添加和删除了.
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