迁移课程原讨论区数据

app/controllers/courses_controller.rb

@@ -1,5 +1,6 @@
 class CoursesController < ApplicationController
   include CoursesHelper
+  helper :activities
 
   menu_item l(:label_sort_by_time), :only => :index
   menu_item l(:label_sort_by_active), :only => :index

app/models/journals_for_message.rb

@@ -18,6 +18,9 @@ class JournalsForMessage < ActiveRecord::Base
   belongs_to :project, 
              :foreign_key => 'jour_id', 
              :conditions => "#{self.table_name}.jour_type = 'Project' "
+  belongs_to :course,
+             :foreign_key => 'jour_id',
+             :conditions => "#{self.table_name}.jour_type = 'Course' "
 
   belongs_to :jour, :polymorphic => true
   belongs_to :user
@@ -87,6 +90,8 @@ class JournalsForMessage < ActiveRecord::Base
       end
     elsif self.jour_type == 'Project'
       self.acts << Activity.new(:user_id => self.reply_id)
+    elsif self.jour_type == 'Course'
+      self.acts << Activity.new(:user_id => self.reply_id)
     else
     end
   end

db/migrate/20140606027403_migrate_course_journals.rb

@@ -0,0 +1,15 @@
+class MigrateCourseJournals < ActiveRecord::Migration
+  def self.up
+    # 原课程的讨论区数据迁移成新模式
+    JournalsForMessage.find_all_by_jour_type('Project').each do |journal|
+      project = Project.find_by_id(journal.jour_id)
+      if project && project.project_type == 1
+        journal.jour_type = 'Course'
+        journal.save
+      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 => 20140605025303) do
+ActiveRecord::Schema.define(:version => 20140606027403) do
 
   create_table "activities", :force => true do |t|
     t.integer "act_id",   :null => false