增加缺评排序，优化获取已评、未评、缺评的数量的方法

app/controllers/student_work_controller.rb

@@ -236,7 +236,17 @@ class StudentWorkController < ApplicationController
   #评价列表显示
   def student_work_absence_penalty
     render_403 unless User.current.allowed_to?(:as_teacher,@course)
-    @stundet_works = @homework.student_works
+    order = params[:order] || "desc"
+    work_ids = "(" + @homework.student_works.map(&:id).join(",") + ")"
+    @stundet_works = StudentWork.find_by_sql("SELECT *,(all_count - has_count) AS absence FROM(
+      SELECT * ,
+        (SELECT COUNT(*) FROM `student_works_evaluation_distributions` WHERE user_id = student_works.user_id AND student_work_id IN #{work_ids}) AS all_count,
+        (SELECT COUNT(*) FROM `student_works_scores` WHERE user_id = student_works.user_id AND student_work_id IN #{work_ids}) AS has_count
+      FROM `student_works`
+      WHERE homework_common_id = 213
+    ) AS table_1
+    ORDER BY absence #{order}")
+    @order = order == "desc" ? "asc" : "desc"
     respond_to do |format|
       format.html
     end

app/views/student_work/student_work_absence_penalty.html.erb

@@ -20,7 +20,8 @@
       <a href="javascript:void(0)">实评</a>
     </li>
     <li class="ml30">
-      <a href="javascript:void(0)">缺评</a>
+      <%= link_to "缺评",student_work_absence_penalty_student_work_index_path(:homework => @homework.id,:order => @order)%>
+      <a href="javascript:void(0);" class="<%= @order == 'desc' ? 'st_up' : 'st_down'%>" ></a>
     </li>
   </ul>
   <div class="cl"></div><!--st_box_top end-->
@@ -35,19 +36,14 @@
         <li class=" hwork_name_ab ">
           <%= link_to student_work.user.show_name,user_path(student_work.user),:title => student_work.user.show_name, :class => "c_blue02"%>
         </li>
-        <%
-           all_count = all_evaluation_count student_work.user,@homework
-           has_count =  has_evaluation_count student_work.user,@homework
-           absence = all_count - has_count
-        %>
         <li class="absence c_grey">
-          <%= all_count%>
+          <%= student_work.all_count%>
         </li>
         <li class="absence c_grey">
-          <%= has_count%>
+          <%= student_work.has_count%>
         </li>
-        <li class="absence <%= absence == 0 ? 'c_green' : 'c_red'%>">
-          <%= absence%>
+        <li class="absence <%= student_work.absence == 0 ? 'c_green' : 'c_red'%>">
+          <%= student_work.absence%>
         </li>
       </ul>
   <% end%>