arel_attributes_values

# File activerecord/lib/active_record/attribute_methods.rb, line 244
    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 || !self.class.readonly_attributes.include?(name)

            value = if klass.serialized_attributes.include?(name)
                      @attributes[name].serialized_value
                    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