oj模式

db/migrate/20191121025552_modify_execute_time_for_hack_user_code.rb

@@ -0,0 +1,6 @@
+class ModifyExecuteTimeForHackUserCode < ActiveRecord::Migration[5.2]
+  def change
+    change_column :hack_user_debugs, :execute_time, :float
+    change_column :hack_user_codes, :execute_time, :float
+  end
+end