轨道3：如何使一个Ajax调用？ [英] Rails 3: How to make an Ajax call?

问题描述

我想有一个链接（有没有更好的选择吗？）我的网页上点击时，这将使一个Ajax请求。 （我想在我的数据库更新字段中的链接被点击时。）

I would like to have a link (is there a better option?) on my page which will make an Ajax request when clicked. (I would like to update a field in my database when the link is clicked.)

什么是实现这一目标的最简单的方法是什么？

What is the simplest way to achieve this ?

您可以参考我的一些教程？

Could you refer me to some tutorials ?

推荐答案

真的很简单。在你看来，有一个链接/按钮，如下所示。重要的一点是：远程=>真正的

Really simple. In your view, have a link/button like so. Important bit being :remote => true

<%= link_to 'Update Thingy', update_thingy_path, :confirm => 'You sure you wanna update?', :remote => true %>

或

<%= button_to('Update Thingy', {:action => 'update_thingy', :thingyid => 314}, :method => :get, :remote => true) %>

显然，你必须得到update_thingy_path解决一些动作是正常的。当你渲染你将要呈现的一些* .js.erb，而不是* .html.erb所不同的是。在这种update_thingy.js.erb，你只要把任何的JavaScript要在客户端上运行。你可能会想通知的更新发生，例如（在jQuery的）用户：

Obviously, you have to get update_thingy_path to resolve to some action as normal. The difference is when you render you are going to be rendering some *.js.erb instead of *.html.erb. In that update_thingy.js.erb, you just put whatever javascript you want to run in the client. You might wanna notify the user that the update happened for example (in jQuery):

$('#notice').html("Thingy was update.")

或者，如果任何的JavaScript你回来真的很简单，在控制器，你可以这样做以下，而不必整体js.erb为一个班轮。

Or if whatever javascript you're returning is really simple, in the controller you can do something like the following instead of having a whole js.erb for a one-liner.

render :js => "alert('Blah')"

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