Contents

module ActiveData
  module Attributes
    class Base
      attr_reader :name, :options

      def initialize name, options = {}, &block
        @name = name.to_sym
        @options = options
        @options[:default] = block if block
      end

      def type
        @type ||= options[:type] || Object
      end

      def values
        @values ||= options[:in].dup if options[:in]
      end

      def default
        @default ||= @options[:default]
      end

      def default_blank?
        @default_blank ||= !!@options[:default_blank]
      end

      def default_value instance
        default.respond_to?(:call) ? default.call(instance) : default unless default.nil?
      end

      def type_cast value
        return value if value.instance_of?(type)
        type.active_data_type_cast(value)
      end

      def generate_instance_methods context
        context.class_eval <<-EOS
          def #{name}
            read_attribute(:#{name})
          end

          def #{name}= value
            write_attribute(:#{name}, value)
          end

          def #{name}?
            read_attribute(:#{name}).present?
          end

          def #{name}_before_type_cast
            read_attribute_before_type_cast(:#{name})
          end
        EOS
      end

      def generate_class_methods context
        if values
          context.class_eval <<-EOS
            def #{name}_values
              _attributes[:#{name}].values
            end
          EOS
        end
      end

    end
  end
end

Version data entries

2 entries across 2 versions & 1 rubygems

Version	Path
active_data-0.3.0	lib/active_data/attributes/base.rb
active_data-0.2.0	lib/active_data/attributes/base.rb