* added issue_relations branch

* issue_relation model added

git-svn-id: http://redmine.rubyforge.org/svn/branches/work@162 e93f8b46-1217-0410-a6f0-8f06a7374b81

issue_relations/app/models/tracker.rb

@@ -0,0 +1,32 @@
+# redMine - project management software
+# Copyright (C) 2006  Jean-Philippe Lang
+#
+# 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 Tracker < ActiveRecord::Base
+  before_destroy :check_integrity  
+  has_many :issues
+  has_many :workflows, :dependent => :delete_all
+  has_and_belongs_to_many :custom_fields, :class_name => 'IssueCustomField', :join_table => 'custom_fields_trackers', :association_foreign_key => 'custom_field_id'
+
+  validates_presence_of :name
+  validates_uniqueness_of :name
+  validates_format_of :name, :with => /^[\w\s\'\-]*$/i
+
+private
+  def check_integrity
+    raise "Can't delete tracker" if Issue.find(:first, :conditions => ["tracker_id=?", self.id])
+  end
+end