User groups feature initial commit.

git-svn-id: http://redmine.rubyforge.org/svn/branches/work@1373 e93f8b46-1217-0410-a6f0-8f06a7374b81

groups/app/models/group.rb

@@ -0,0 +1,39 @@
+# redMine - project management software
+# Copyright (C) 2008  FreeCode
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License
+# as published by the Free Software Foundation; either version 2
+# of the License, or (at your option) any later version.
+# 
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+# 
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+
+class Group < ActiveRecord::Base
+  
+  has_many :users, :dependent => :nullify
+  has_many :memberships, :class_name => 'Member', :as => :principal, :dependent => :destroy
+  has_many :members, :as => :principal,
+                     :include => [ :project, :role ],
+                     :conditions => "#{Project.table_name}.status=#{Project::STATUS_ACTIVE}",
+                     :order => "#{Project.table_name}.name"
+  has_many :custom_values, :dependent => :delete_all, :as => :customized
+    
+  validates_presence_of :name
+  validates_uniqueness_of :name
+  validates_length_of :name, :maximum => 30
+  
+  def <=>(group)
+    name <=> group.name
+  end
+  
+  def to_s
+    name
+  end
+end