课程资源文件迁移，从项目中分离

app/models/attachment.rb

@@ -21,6 +21,7 @@ require "fileutils"
 class Attachment < ActiveRecord::Base
   belongs_to :container, :polymorphic => true
   belongs_to :project, foreign_key: 'container_id', conditions: "attachments.container_type = 'Project'"
+  belongs_to :course, foreign_key: 'container_id', conditions: "attachments.container_type = 'Course'"
   belongs_to :softapplication, foreign_key: 'container_id', conditions: "attachments.container_type = 'Softapplication'"
   belongs_to :author, :class_name => "User", :foreign_key => "author_id"
   belongs_to :attachmentstype,  :foreign_key => "attachtype",:primary_key => "id"

app/views/layouts/base_courses.html.erb

@@ -40,9 +40,9 @@
       </td>
     </tr>
     <tr>
-      <td style="padding-left: 8px"><%= link_to request.host()+"/course", :controller => 'courses', :action => 'course' %></td>
+      <td style="padding-left: 8px"><%= link_to request.host()+"/course", :controller => 'courses', :action => 'index' %></td>
       <td><p class="top-content-list"><%= link_to "主页", home_path %>
-        > <%= link_to l(:label_course_practice), :controller => 'courses', :action => 'course' %>
+        > <%= link_to l(:label_course_practice), :controller => 'courses', :action => 'index' %>
         > <%= link_to @course.name, nil %></p></td>
     </tr>
   </table>
@@ -79,9 +79,6 @@
                         <% end %>
                         <% unless User.current.member_of?(@course) %>
                             <!-- <%= image_tag "/images/fav.png" %> -->
-                            <div style="padding-right: 10px">
-                              <span class="icon-fav icon"></span><span>
-												<%= watcher_link(@course, User.current) %></span></div>
                         <% end %>
                     <% end %>
                   </div>

db/migrate/20140605025302_migrate_course_attachments.rb

@@ -0,0 +1,17 @@
+class MigrateCourseAttachments < ActiveRecord::Migration
+  def self.up
+    # 原课程的资源数据迁移成新模式
+    Attachment.all.each do |attach|
+      if attach.container_type == "Project"
+        project = Project.find_by_id(attach.container_id)
+        if project && project.project_type == 1
+          attach.container_type= 'Course'
+          attach.save
+        end
+      end
+    end
+  end
+
+  def self.down
+  end
+end

db/schema.rb

@@ -11,7 +11,7 @@
 #
 # It's strongly recommended to check this file into your version control system.
 
-ActiveRecord::Schema.define(:version => 20140605025300) do
+ActiveRecord::Schema.define(:version => 20140605025302) do
 
   create_table "activities", :force => true do |t|
     t.integer "act_id",   :null => false