隐藏的实训除超级管理员外，其他人无法查看

app/services/shixuns_service.rb

@@ -119,6 +119,9 @@ class ShixunsService
     @children_list = []
     # 目前只取十个，不多N+1问题不大
     # 需要彻底解决则需要改数据路结构，比如Nested算法可以解决
+    unless current_user.admin?
+      discusses = discusses.where(:hidden => false)
+    end
     if discusses.present?
       discusses.each do |d|
         # 总点赞数

db/migrate/20190605063236_modify_hidden_defualt_for_discusses.rb

@@ -0,0 +1,8 @@
+class ModifyHiddenDefualtForDiscusses < ActiveRecord::Migration
+  def up
+    change_column :discusses, :hidden, :boolean, :default => true
+  end
+
+  def down
+  end
+end