fixbug

db/migrate/20191119021844_add_close_browser_time_for_games.rb

@@ -1,6 +1,5 @@
 class AddCloseBrowserTimeForGames < ActiveRecord::Migration[5.2]
   def change
-    remove_column :games,:close_browse_time
     add_column :games, :play_time, :timestamp
     add_column :games, :play_sign, :integer, :default => 0
   end