直播增加级别限制

app/models/live_broad.rb

@@ -52,7 +52,7 @@ class LiveBroad < ActiveRecord::Base
           if i==0
             str=RANK_HASH[item.to_s]
           else
-            str=str+","+=RANK_HASH[item.to_s]
+            str=str+","+RANK_HASH[item.to_s]
           end
           i=i+1
         end