如何在 jQuery 中调用 rails 方法
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How to call a rails method from in jQuery
提问by user730569
I have this JQuery code:
我有这个 JQuery 代码：
$("p.exclamation, div#notification_box").live("mouseover", function() {
});
and I want to call this rails method from inside the jQuery code as a callback:
我想从 jQuery 代码内部调用这个 rails 方法作为回调：
def render_read
self.user_notifications.where(:read => false).each do |n|
n.read = true
n.save
end
end
This method is in my user model. Is there any way to do this?
这个方法在我的用户模型中。有没有办法做到这一点？
回答by edgerunner
Make an AJAX call, set up a route, respond with a controller action and call your method.
进行 AJAX 调用，设置路由，使用控制器操作进行响应并调用您的方法。
# whatever.js
$("p.exclamation, div#notification_box").on("mouseover", function() {
$.ajax("/users/render_read")
});
# routes.rb
resources :users do
get :render_read, on: :collection
# or you may prefer to call this route on: :member
end
# users_controller.rb
def render_read
@current_user.render_read
# I made this part up, do whatever necessary to find the needed user here
end
PS: This code is for Rails 3.x and Ruby 1.9.x
PS：此代码适用于 Rails 3.x 和 Ruby 1.9.x
回答by Andy Gaskell
It's good that you have that model code. We'll need to add a new action and make sure your route is setup. If you're using resources you'll have to add collection or member. Since you're doing an update I would choose PUTas the http method.
很高兴您拥有该模型代码。我们需要添加一个新操作并确保您的路线已设置。如果您正在使用资源，则必须添加集合或成员。由于您正在进行更新，我会选择PUThttp 方法。
Here's an example route:
这是一个示例路线：
resources :user_notifications do
??collection do
????put 'render_read'
??end
end
Go ahead and add the render_readaction to your controller.
继续并将操作添加render_read到您的控制器。
Your jQuery code will look something like this:
您的 jQuery 代码将如下所示：
$("p.exclamation, div#notification_box").live("mouseover", function() {
$.ajax({
url: "/user_notifications/render_read",
type: 'PUT'
});
});
回答by Javier Giovannini
Normally JavaScript works in the client side, but it's is also possible that your application draws a javaScript function for a each client. In that case you can use the <%=and tags %>in a .erb file:
通常 JavaScript 在客户端工作，但您的应用程序也可能为每个客户端绘制一个 javaScript 函数。在这种情况下，您可以在 .erb 文件中使用<%=和 标签%>：
<script type="text/javascript">
$(function(){
new AClass.function({
text: <%= Date.today %>
});
});
</script>
