如何将JSON响应从控制器发送到jQuery并进行检查? [英] How to send json response from controller to jQuery and inspect it?

问题描述

我有这个问题:我正在检查控制器中的用户电子邮件，并发送json成功响应(如果已被接受)，并添加输入的CSS样式，我还需要防止提交和添加一些消息.

I have this problem : I'm checking user email in controller and sending json successfull response if it is already taken and add css styling of input, also I need to prevent submit and add some message.

这是我的checkemail操作(用于本文- http://paydrotalks.com/posts/45-standard-json-response-for-rails-and-jquery ):

Here is my checkemail action ( used this article - http://paydrotalks.com/posts/45-standard-json-response-for-rails-and-jquery ):

def checkemail
  if !User.where('email = ?', params[:email]).empty?
    format.jsonr do
      render :json => { 
        :status => :ok, 
        :message => "Success!",
      }.to_json
    end
  end
end

以及在我的路线上

         checkemail GET    /checkemail(.:format)

          match "/checkemail", to: 'edit_user#checkemail'

和我的jQuery:

   $('#user_email').focusout(function() {
    $.getJSON('/checkemail', { email: $('#user_email').val() }, function(data) {
        $('#user_email').addClass("error");
      });
   });

我的HTML输入代码:

my HTML input code:

     <input id="user_email" name="user[email]" size="30" type="email" value="">

来自mime_type初始化程序文件:

from mime_type initializers file:

    Mime::Type.register_alias "application/json", :jsonr, %w( text/x-json )

来自Fiddler:

  Request : GET /checkemail?[e-mail] HTTP/2.0

  Response(RAW tab) : 
  Missing template edit_user/checkemail

  JSON tab is empty

问题:如何检查是否发送了json请求?如何阻止提交表单并添加一些消息?

推荐答案

为什么format.jsonr?对我来说似乎是一个错字.

Why format.jsonr ? Seems like a typo to me.

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