arel_attributes_values

# File activerecord/lib/active_record/base.rb, line 1963
      def arel_attributes_values(include_primary_key = true, include_readonly_attributes = true, attribute_names = @attributes.keys)
        attrs      = {}
        klass      = self.class
        arel_table = klass.arel_table

        attribute_names.each do |name|
          if (column = column_for_attribute(name)) && (include_primary_key || !column.primary)

            if include_readonly_attributes || (!include_readonly_attributes && !self.class.readonly_attributes.include?(name))

              value = if coder = klass.serialized_attributes[name]
                        coder.dump @attributes[name]
                      else
                        # FIXME: we need @attributes to be used consistently.
                        # If the values stored in @attributes were already type
                        # casted, this code could be simplified
                        read_attribute(name)
                      end

              attrs[arel_table[name]] = value
            end
          end
        end
        attrs
      end