1、大于90分显示红色，小于90分显示绿色，未评分，显示灰色

2、迟交显示

app/helpers/student_work_helper.rb

@@ -70,4 +70,14 @@ module StudentWorkHelper
   def has_evaluation_count user,homework
     StudentWorksScore.joins(:student_work).where("student_works_scores.user_id = #{user.id} AND student_works.homework_common_id = #{homework.id}").count
   end
+
+  #传入分数，获取对应颜色
+  def score_color score
+    if score
+      color = score >= 90 ? "c_red" : "c_green"
+    else
+      color = "c_grey"
+    end
+    color
+  end
 end

app/views/student_work/_student_work.html.erb

@@ -12,18 +12,22 @@
     <%= link_to student_work.name, student_work_path(student_work),:remote => true,:title => student_work.name, :class => "c_blue02"%>
   </li>
   <li class=" hwork_time_c">
-    06-01
+    <% if Time.parse(@homework.end_time.to_s) < Time.parse(student_work.created_at.to_s) %>
+        <span class="c_red">迟交</span>
+    <% else%>
+        <%= student_work.created_at.strftime("%m-%d").to_s%>
+    <% end %>
   </li>
-  <li class=" hwork_score c_red">
+  <li class=" hwork_score <%= score_color student_work.teacher_score%>">
     <%= student_work.teacher_score.nil? ? "--" : format("%.1f",student_work.teacher_score)%>
   </li>
-  <li class=" hwork_score c_red">
+  <li class=" hwork_score <%= score_color student_work.teaching_asistant_score%>">
     <%= student_work.teaching_asistant_score.nil? ? "--" : format("%.1f",student_work.teaching_asistant_score)%>
   </li>
-  <li class=" hwork_code02 <%= student_work.student_score.nil? ? 'c_grey' : 'c_red'%> student_score_info" >
+  <li class=" hwork_code02 <%= score_color student_work.student_score%> student_score_info" >
     <%= student_work.student_score.nil? ? "--" : format("%.1f",student_work.student_score)%>
     <% unless student_work.student_score.nil?%>
-        <span class="c_blue">
+        <span class="">
           (<%= student_work.student_works_scores.where(:reviewer_role => 3).count%>)
         </span>
         <div class="info_ni">
@@ -34,7 +38,7 @@
         </div>
     <% end%>
   </li>
-  <li class=" hwork_score <%= student_work.final_score.nil? ? 'c_grey' : 'c_red'%>">
+  <li class=" hwork_score <%= score_color student_work.final_score%>">
     <%= student_work.final_score.nil? ? "--" : format("%.1f",student_work.final_score)%>
   </li>
   <div class="cl"></div>