实训首页搜索有重复

app/controllers/shixuns_controller.rb

@@ -47,7 +47,7 @@ class ShixunsController < ApplicationController
 					where("challenge_tags.name like '%#{keyword}%'
                   or challenges.subject like '%#{keyword}%'
                   or concat(lastname, firstname) like '%#{keyword}%'
-                  or shixuns.name like '%#{keyword.split(" ").join("%")}%'")
+                  or shixuns.name like '%#{keyword.split(" ").join("%")}%'").distinct
 		end
 
 		## 筛选 状态