选用实训中过滤掉未发布的实践课程

app/views/shixun_lists/index.json.jbuilder

@@ -21,7 +21,7 @@ json.shixun_list do
     json.pic url_to_avatar(obj)
     json.content highlights
     json.level level_to_s(obj.trainee)
-    json.subjects obj.subjects.uniq do |subject|
+    json.subjects obj.subjects.visible.unhidden.uniq do |subject|
       json.(subject, :id, :name)
     end
   end