资源接口连调

app/views/courses/left_banner.json.jbuilder

@@ -30,6 +30,7 @@ json.course_modules @course_modules.each do |mod|
 
           json.third_category category.children do |child|
             json.partial! "category_info", category: child
+            json.parent_id child.parent_id
           end
         end
     end