详情中的名称

app/views/hack_user_lastest_codes/record_detail.json.jbuilder

@@ -1,3 +1,4 @@
 json.(@hack_user, :id, :status, :error_line, :error_msg, :expected_output,
     :input, :output, :execute_time, :execute_memory)
 json.language @hack_user.hack.language
+json.name @hack_user.hack.name

app/views/hack_user_lastest_codes/show.json.jbuilder

@@ -1,5 +1,5 @@
 json.hack do
-  json.(@hack, :difficult, :time_limit, :description, :score, :identifier)
+  json.(@hack, :name, :difficult, :time_limit, :description, :score, :identifier)
   json.language @hack.language
   json.username @hack.user.real_name
   json.code @my_hack.code