Introduced acts_as_paranoid. Avoid deleting of suppliers and articles. (for consistency of order-results)

db/migrate/20090119155930_acts_as_paranoid.rb

@@ -0,0 +1,11 @@
+class ActsAsParanoid < ActiveRecord::Migration
+  def self.up
+    add_column :suppliers, :deleted_at, :datetime
+    add_column :articles, :deleted_at, :datetime
+  end
+
+  def self.down
+    remove_column :suppliers, :deleted_at, :datetime
+    remove_column :articles, :deleted_at, :datetime
+  end
+end