ruby-on-rails – 通过json设计失败认证发回html而不是json

class Users:: SessionsController < Devise::SessionsController
  def create
    respond_to do |format|  
      format.html { super }  
      format.json {  
        warden.authenticate!(:scope => resource_name,:recall => "#{controller_path}#failure")  
        render :json => {:success => true}  
      }
    end  
  end

  def destroy
    respond_to do |format|
      format.html {super}
      format.json {  
        Devise.sign_out_all_scopes ? sign_out : sign_out(resource_name)
        render :json => {}
      }
    end
  end

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

这很好,但是当身份验证失败时,失败并不会返回json失败.我有一个定制的设计失败.如果我删除redirect_url或完全删除客户故障,则身份验证将返回带有失败消息的json.我的自定义失败如下：

class CustomFailure < Devise::FailureApp
  def redirect_url
    #return super unless [:worker,:employer,:user].include?(scope) #make it specific to a scope
     '/'
  end

  # You need to override respond to eliminate recall
  def respond
    if http_auth?
      http_auth
  else
    redirect
  end
end

结束

无论如何,如果它是一个html请求,保持重定向,并返回一个带有失败消息的json,如果它是一个json请求？

谢谢！