Contents

module ActiveEnum
  module ActsAsEnum

    module MacroMethods

      def acts_as_enum(options={})
        extend ClassMethods
        class_attribute :active_enum_options
        self.active_enum_options = options.reverse_merge(:name_column => 'name')
        scope :enum_values, proc { select("#{primary_key}, #{active_enum_options[:name_column]}").
                                   where(active_enum_options[:conditions]).
                                   order("#{primary_key} #{active_enum_options[:order]}") }
      end

    end

    module ClassMethods

      def ids
        enum_values.map {|v| v.id }
      end

      def names
        enum_values.map {|v| v.send(active_enum_options[:name_column]) }
      end

      def to_select
        enum_values.map {|v| [v.send(active_enum_options[:name_column]), v.id] }
      end

      def [](index)
        if index.is_a?(Fixnum)
          v = lookup_by_id(index)
          v.send(active_enum_options[:name_column]) unless v.blank?
        else
          v = lookup_by_name(index)
          v.id unless v.blank?
        end
      end

      private

      def lookup_by_id(index)
        enum_values.find_by_id(index)
      end

      def lookup_by_name(index)
        enum_values.where("#{active_enum_options[:name_column]} like lower(?)", index.to_s).first
      end

    end

  end
end

ActiveRecord::Base.extend ActiveEnum::ActsAsEnum::MacroMethods

Version data entries

1 entries across 1 versions & 1 rubygems

Version	Path
active_enum-1.0.0.pre	lib/active_enum/acts_as_enum.rb