Rails 3设计Ajax登录捕获错误消息

Question

我在:
Rails 3.0.9
设计1.4.7
jquery-ujs

我做了什么？...
1)我已经使用data-remote ="true"设置了登录表单.
2)我已经设置了登录jquery处理程序:

('form#user-reg-form')
    .bind("ajax:beforeSend", function(evt, xhr, settings){
    })
    .bind("ajax:success", function(evt, data, status, xhr){
      $('#comments').append(xhr.responseText);

    })
    .bind('ajax:complete', function(evt, xhr, status){
    })
    .bind("ajax:error", function(evt, xhr, status, error){
      try {
        errors = $.parseJSON(xhr.responseText);
      } catch(err) {
        errors = {message: "Please reload the page and try again"};
      }
      errorText = "There were errors with the submission: \n<ul>";

      for ( error in errors ) {
        errorText += "<li>" + error + ': ' + errors[error] + "</li> ";
      }

      errorText += "</ul>";

      // Insert error list into form
      $form.find('div.validation-error').html(errorText);
    });

3)我重新定义了会话控制器,如下所示:

  def create
    resource = warden.authenticate!(:scope => resource_name, :recall => "#{controller_path}#failure")
    sign_in(resource_name, resource)
    return render :json => { :success => true, :content => current_user.email }
  end

  def failure
    return render:json => {:success => false, :errors => ["Login failed."]}
  end

4)我已经设置了route.rb文件:

devise_for :users, :controllers => {:sessions => "sessions"}

一切正常......但是当我传递错误的电子邮件或密码时,我从用户模型(可能来自Devise)收到未被发送的消息"电子邮件或密码错误".但是我想抓住这条消息并把它放在json对象中这样的返回渲染:json => {:success => false,:errors => ////电子邮件或密码错误////}

问题是:召回不起作用.它看起来像Warden.authenticate!没有看到我的失败方法

Answer 1

解决方案非常简单）
我必须在config/initializers/devise.rb中设置：

config.http_authenticatable_on_xhr = false
config.navigational_formats = [:html, :json]