Use AR callbacks instead of observers (removed in Rails4) for notifications.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@12021 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/models/news.rb

@@ -33,6 +33,7 @@ class News < ActiveRecord::Base
   acts_as_watchable
 
   after_create :add_author_as_watcher
+  after_create :send_notification
 
   scope :visible, lambda {|*args|
     includes(:project).where(Project.allowed_to_condition(args.shift || User.current, :view_news, *args))
@@ -63,4 +64,10 @@ class News < ActiveRecord::Base
   def add_author_as_watcher
     Watcher.create(:watchable => self, :user => author)
   end
+
+  def send_notification
+    if Setting.notified_events.include?('news_added')
+      Mailer.news_added(self).deliver
+    end
+  end
 end