Adds named scopes to replace custom finders.

* Adds watched_by class method in ActsAsWatchable
* Adds Issue#recently_updated, Issue#with_limit and Issue#on_active_project

  #2482

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@3557 e93f8b46-1217-0410-a6f0-8f06a7374b81

vendor/plugins/acts_as_watchable/lib/acts_as_watchable.rb

@@ -15,6 +15,10 @@ module Redmine
             has_many :watchers, :as => :watchable, :dependent => :delete_all
             has_many :watcher_users, :through => :watchers, :source => :user
             
+            named_scope :watched_by, lambda { |user_id|
+              { :include => :watchers,
+                :conditions => ["#{Watcher.table_name}.user_id = ?", user_id] }
+            }
             attr_protected :watcher_ids, :watcher_user_ids
           end
         end
@@ -60,14 +64,7 @@ module Redmine
           notified.collect(&:mail).compact
         end
 
-        module ClassMethods
-          # Returns the objects that are watched by user
-          def watched_by(user)
-            find(:all, 
-                 :include => :watchers,
-                 :conditions => ["#{Watcher.table_name}.user_id = ?", user.id])
-          end
-        end
+        module ClassMethods; end
       end
     end
   end