用rails-Ajax调用控制器方法? [英] Call controller method with rails-Ajax?

问题描述

我正在尝试通过视图中的按钮在application_controller.rb中执行Ruby方法. 在昨天的一篇文章中，有人告诉我使用Ajax调用来这样做，因为如果没有它，它将仅在页面加载时运行.

I am trying to execute a Ruby method in my application_controller.rb from a button in my view. In a post yesterday, someone told me to use an Ajax call to do so because, without it, would just run on page load.

我对此很陌生，很难理解.

I'm very new to this and I have a hard time understanding it.

我安装了rails-Ajax gem，并将其添加到我的Gem文件中.

I installed the rails-Ajax gem, and it is added to my Gem file.

我遵循了"将Ajax功能与历史记录，书签添加和部分刷新功能集成到Rails网站，Rails闪烁，用户回调，脚本执行，重定向.，直到第5步.

I followed "Integrate Ajax capabilities to Rails websites with history, bookmarking, partial refreshes, Rails flashes, user callbacks, scripts execution, redirections." untill step 5.

我只是不知道下一步该怎么做.

I just don't know what to do it next.

这是我当前的配置.该方法仅在页面加载时运行:

Here is my current configuration. The method only runs on page load:

我的观点:

<td><button type="button" onclick="executeit()" class="btn btn- default">executer</button></td>

<script>
function executeit() {
 var selectingCommand = document.getElementById("CommandSelect");
 var selectedCommand = selectingCommand.options[selectingCommand.selectedIndex].text;
 var selectingServer = document.getElementById("serverlist");
 var selectedServer = selectingServer.options[selectingServer.selectedIndex].text;
 var username=document.getElementById("login").text;
 var password=document.getElementById("password").text;



<%execute%>;

}
</script>

我在application_controller.rb中的方法:

My method in application_controller.rb :

def execute
  require 'rubygems'
  require 'net/ssh'

  @hostname = "smtlmon02"
  @username = "test"
  @password = "1234"
  @cmd = "ls -al"
  @cmd2 = "sudo su - -c 'ls;date'"
  @cmd3 = "ls -alrt"

  ssh = Net::SSH.start(@hostname, @username, :password => @password)
  res = ssh.exec!(@cmd)
  res2 = ssh.exec!(@cmd2)

  ssh.close
  puts res2

end

如果有人能解释如何做到这一点真是太棒了！

It would be fantastic if anyone could explain how to do it!

推荐答案

我不确定我是否完全看到了您的目标，但是，如果您只是想在单击按钮时调用控制器动作，我会采用这种方式:

I am not sure I see your goal completely, however, if you just want to call a controller action when clicking on your button, I would approach it like this:

以下是HTML:

<a href='#' id='executer-button' class='btn btn-default'>Executer</a>

您应该将其放置在您的app/assets/javascripts/execute_caller.js中:

You should place this in you app/assets/javascripts/execute_caller.js:

//This function calls the "execute" controller action, using its route and also
//passes a "selectingCommand" variable to it
var callExecuter=function(){
  $.ajax({
    type:'GET',
    url:'/executer_route',
    data: { selectingCommand : document.getElementById("CommandSelect"); 
          },
    success:function(){
      //I assume you want to do something on controller action execution success?
      $(this).addClass('done');
    }
  });
}

$(document).on("click","#executer-button",callExecuter);

然后:

1. 检查您的rake routes，以了解哪个是通往控制器操作execute的适当路径.
2. 将其替换在$.ajax(...)函数的url字段中.
3. 假设您有debugger或pry宝石，请在def execute动作控制器内写入debugger，以确保您通过ajax到达那里.
4. 相应地在ajax调用中编辑success上的操作，以便它执行您想要的操作.

1. Check your rake routes to see which is the appropiate route to the controller action execute.
2. Replace it in the url field of the $.ajax(...) function.
3. Assuming you have either debuggeror pry gem, write debugger inside your def execute action controller, to make sure you reach there via ajax.
4. Edit your on success action in the ajax call accordingly, so it does what you want it to do.

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