调整

app/controllers/student_works_controller.rb

@@ -434,7 +434,7 @@ class StudentWorksController < ApplicationController
 
     # 用户最大评测次数
     if @games
-      @user_evaluate_count = @games.sum(:evaluate_count)
+      @user_evaluate_count = @games.pluck(:evaluate_count).sum
       @games = @games.includes(:challenge, :game_codes, :outputs)
     else
       @user_evaluate_count = 0
@@ -450,7 +450,7 @@ class StudentWorksController < ApplicationController
     @games = @work.myshixun.games.includes(:challenge, :game_codes, :outputs) if @work.myshixun
 
     # 用户最大评测次数
-    @user_evaluate_count = @games.sum(:evaluate_count) if @games
+    @user_evaluate_count = @games.pluck(:evaluate_count).sum if @games
     # 图形效率图的数据
     @echart_data = student_efficiency(@homework, @work)
     @myself_eff = @echart_data[:efficiency_list].find { |item| item.last == @user.id }