作品列表中的已提交人数无法自动刷新

app/controllers/student_work_controller.rb

@@ -868,6 +868,7 @@ class StudentWorkController < ApplicationController
       update_org_activity(@homework.class,@homework.id)
       if @work.save
         @work = @homework.student_works.select("student_works.*,student_works.work_score as score").where(:id => @work.id).first
+        @count = @homework.student_works.has_committed.count
         respond_to do |format|
           format.js
         end

app/views/student_work/_student_work_list.html.erb

@@ -2,7 +2,7 @@
   <span class="c_dark f14 fb fl mr15">
       作品
       <font class="f12 c_red">
-        (<%= @student_work_count%>人已交)
+        (<span id="student_work_count"><%= @student_work_count%></span>人已交)
       </font>
     <%# my_work = @homework.student_works.where("user_id = #{User.current.id}").first %>
     <% my_work = cur_user_works_for_homework @homework %>

app/views/student_work/add_score.js.erb

@@ -17,3 +17,5 @@ $("#score_list_<%= @work.id%>").removeAttr("style");
     $("tr[id='student_work_<%= @work.id%>']").replaceWith("<%= escape_javascript(render :partial => 'evaluation_work',:locals => {:student_work => @work, :index => 1}) %>");
     $("#work_num_<%= @work.id%>").html(num);
 <% end%>
+
+$("#student_work_count").html("<%=@count %>");