validates_length_of :identifier, :in => 1..20
# donwcase letters, digits, dashes but not digits only
validates_format_of :identifier, :with => /^(?!\d+$)[a-z0-9\-]*$/, :if => Proc.new { |p| p.identifier_changed? }
-
+ # reserved words
+ validates_exclusion_of :identifier, :in => %w( new )
+
before_destroy :delete_all_members
named_scope :has_module, lambda { |mod| { :conditions => ["#{Project.table_name}.id IN (SELECT em.project_id FROM #{EnabledModule.table_name} em WHERE em.name=?)", mod.to_s] } }