distros - adding system_template_distribution table

src/app/models/system_template.rb

@@ -42,6 +42,7 @@ class SystemTemplate < ActiveRecord::Base
   has_many :packages, :class_name => "SystemTemplatePackage", :inverse_of => :system_template, :dependent => :destroy
   has_many :package_groups, :class_name => "SystemTemplatePackGroup", :inverse_of => :system_template, :dependent => :destroy
   has_many :pg_categories, :class_name => "SystemTemplatePgCategory", :inverse_of => :system_template, :dependent => :destroy
+  has_many :distributions, :class_name => "SystemTemplateDistribution", :inverse_of => :system_template, :dependent => :destroy
 
   attr_accessor :host_group
   lazy_accessor :parameters, :initializer => lambda { init_parameters }, :unless => lambda { false }

src/app/models/system_template_distribution.rb

@@ -0,0 +1,16 @@
+#
+# Copyright 2011 Red Hat, Inc.
+#
+# This software is licensed to you under the GNU General Public
+# License as published by the Free Software Foundation; either version
+# 2 of the License (GPLv2) or (at your option) any later version.
+# There is NO WARRANTY for this software, express or implied,
+# including the implied warranties of MERCHANTABILITY,
+# NON-INFRINGEMENT, or FITNESS FOR A PARTICULAR PURPOSE. You should
+# have received a copy of GPLv2 along with this software; if not, see
+# http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
+
+class SystemTemplateDistribution < ActiveRecord::Base
+  belongs_to :system_template, :inverse_of => :distributions
+  validates_uniqueness_of [:distribution_cp_id], :scope => :system_template_id, :message => _("is already in the template")
+end

src/db/migrate/20111026133825_add_system_template_distribution.rb

@@ -0,0 +1,13 @@
+class AddSystemTemplateDistribution < ActiveRecord::Migration
+  def self.up
+    create_table :system_template_distributions do |t|
+       t.integer :system_template_id, :null => false
+       t.string :distribution_pulp_id, :null => false
+    end
+    add_index :system_template_distributions, :system_template_id
+  end
+
+  def self.down
+    drop_table :system_template_distributions
+  end
+end