增加课程资源分离出来相关表

app/models/course_attachment.rb

@@ -0,0 +1,3 @@
+class CourseAttachment < ActiveRecord::Base
+  attr_accessible :attachtype, :author_id, :content_type, :description, :digest, :disk_directory, :disk_filename, :downloads, :filename, :filesize, :integer, :is_public
+end

db/migrate/20140812032957_create_course_attachments.rb

@@ -0,0 +1,20 @@
+class CreateCourseAttachments < ActiveRecord::Migration
+  def change
+    create_table :course_attachments do |t|
+      t.string :filename
+      t.string :disk_filename
+      t.integer :filesize
+      t.string :content_type
+      t.string :digest
+      t.integer :downloads
+      t.string :author_id
+      t.string :integer
+      t.string :description
+      t.string :disk_directory
+      t.integer :attachtype
+      t.integer :is_public
+
+      t.timestamps
+    end
+  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 => 20140801034242) do
+ActiveRecord::Schema.define(:version => 20140812032957) do
 
   create_table "activities", :force => true do |t|
     t.integer "act_id",   :null => false
@@ -291,6 +291,23 @@ ActiveRecord::Schema.define(:version => 20140801034242) do
     t.datetime "updated_on",                  :null => false
   end
 
+  create_table "course_attachments", :force => true do |t|
+    t.string   "filename"
+    t.string   "disk_filename"
+    t.integer  "filesize"
+    t.string   "content_type"
+    t.string   "digest"
+    t.integer  "downloads"
+    t.string   "author_id"
+    t.string   "integer"
+    t.string   "description"
+    t.string   "disk_directory"
+    t.integer  "attachtype"
+    t.integer  "is_public"
+    t.datetime "created_at",     :null => false
+    t.datetime "updated_at",     :null => false
+  end
+
   create_table "course_infos", :force => true do |t|
     t.integer  "course_id"
     t.integer  "user_id"