课程简介没有内容就不要显示

app/views/layouts/base_courses.html.erb

@@ -227,6 +227,7 @@
         </ul>
     <% end %>
 
+    <% if @course.description && !@course.description.blank? %>
       <div class="project_intro">
         <div id="course_description" class="course_description">
           <h4 ><%= l(:label_course_brief_introduction)%>：</h4>
@@ -241,6 +242,7 @@
           </span>
         </div>
       </div><!--项目简介 end-->
+    <% end %>
       <div class="project_Label">
         <h4 class="mb5" ><%= l(:label_tag)%>：</h4>
         <div class="tag_h" >