# File lib/fog/rackspace/models/monitoring/base.rb, line 11
        def hash
          attrs = attributes.dup
          attrs.delete_if {|key, value| [:created_at, :updated_at, :id].include?(key)}
          attrs.delete_if {|key, value| value.kind_of?(Base) }
          keys = attrs.keys.map{|sym| sym.to_s}.sort.join ''
          values = attrs.values.map{|sym| sym.to_s}.sort.join ''
          Digest::MD5.hexdigest(keys + values)
        end