镜像描述问题

app/controllers/application_controller.rb

@@ -416,7 +416,7 @@ class ApplicationController < ActionController::Base
 	# 实训主类别列表，自带描述
 	def shixun_main_type
 		list = []
-		mirrors = MirrorRepository.select([:id, :type_name]).published_main_mirror
+		mirrors = MirrorRepository.select([:id, :type_name, :description]).published_main_mirror
 		mirrors.try(:each) do |mirror|
 			list << {id: mirror.id, type_name: mirror.type_name, description: mirror.try(:description)}
 		end