t

app/views/courses/index.html.erb

@@ -80,6 +80,7 @@
                           <td><%= link_to "是",isdegree_course_path(course), class: 'btn btn-xs btn-info' %></td>
                       <% end %>
                       <td><td><a class="btn btn-xs btn-success" href=<%="https://courseselectofstormand.herokuapp.com#{course.excel}"%> >下载最新资料</a></td></td>
+                      <td><%= course.excel %></td>
                   <% end %>
                 </tr>
             <% end %>

db/migrate/20170105083346_add_newfile_to_course.rb

@@ -1,5 +0,0 @@
-class AddNewfileToCourse < ActiveRecord::Migration
-  def change
-    add_column :courses, :excel, :string
-  end
-end