是否可以从javascript中调用Rails助手方法? [英] is it possible to call a rails helper method from within javascript?

问题描述

我的application.html.erb [查看文件]中有一个javascript代码块，该代码块接收来自外部api的事件.我要做的就是当事件在javascript代码块中收到时，我需要在[application_helper.rb]内部执行一个辅助方法.

I have a javascript code block in my application.html.erb [view file] which receives an event from external api. all i want to do is when the event is recieved in the javascript code block i need to execute a helper method inside [application_helper.rb].

我在这里浏览了大多数te堆栈，但是找不到任何相关的答案.

I have gone through most of te stacks in here but could not find any relevant answer.

javascript代码块如下所示:

the javascript code block looks like this:

var pusher = new Pusher('b00c9657a0a896f3ec26');
var channel = pusher.subscribe('NewOrders');
channel.bind('NewOrderArrived', function(data) {

    [ I NEED TO CALL THE RAILS HELPER METHOD HERE ]

console.log("got u")
});

推荐答案

不直接，不.正如Dave Newton在评论中所说，Ruby在服务器上执行，而JS在客户端上执行.您想要做的是这样的:

Not directly, no. As Dave Newton said in the comment, Ruby executes on the server and JS executes on the client. What you'll want to do is something like this:

var pusher = new Pusher('b00c9657a0a896f3ec26');
var channel = pusher.subscribe('NewOrders');
channel.bind('NewOrderArrived', function(data) {
  $.get('<%= url_for :some_controller_method_that_calls_helper %>', function(response){
    // the response variable will contain the output of the controller method
  });
  console.log("got u")
});

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