从控制器调用javascript函数 [英] Calling javascript functions from controller

问题描述

是否可以从rails中的控制器调用javascript函数？

Is it possible to call a javascript function from a controller in rails?

推荐答案

我所做的是让Rails控制器产生一个javascript动作。让它调用包含javascript的部分。

What I do is to make a Rails controller produce a javascript action. Is have it call a partial that has javascript included in it.

除非你想在页面加载时激活它，否则我会通过AJAX进行设置。因此，我向控制器发出一个AJAX调用，然后调用一个javascript文件。

Unless you want that activated on page load, I would set it up via AJAX. So that I make an AJAX call to the controller which then calls a javascript file.

这可以通过投票看到：

首先是AJAX

//This instantiates a function you may use several times.

jQuery.fn.submitWithAjax = function() {
  this.live("click", function() {
    $.ajax({type: "GET", url: $(this).attr("href"), dataType: "script"});
    return false;
  });
};

// Here's an example of the class that will be 'clicked'
$(".vote").submitWithAjax();

控制器第二

点击的类 $（。vote）有一个调用我的控制器的属性href。

The class $(".vote") that was clicked had an attribute href that called to my controller.

def vote_up
  respond_to do |format|
    # The action 'vote' is called here.
    format.js { render :action => "vote", :layout => false }
  end
end

现在控制器加载一个AJAX文件

// this file is called vote.js.haml
==  $("#post_#{@post.id}").replaceWith("#{ escape_javascript(render :partial => 'main/post_view', :locals => {:post_view => @post}) }");

您已成功从控制器调用了javascript函数。

You have successfully called a javascript function from a controller.

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