Contents

require 'representable'

module Roar
  module Representer
    module Base
      def self.included(base)
        base.class_eval do
          include Representable
          extend ClassMethods
          
          class << self
            alias_method :property, :representable_property
            alias_method :collection, :representable_collection
          end
        end
      end
      
        
      module ClassMethods
        # Creates a representer instance and fills it with +attributes+.
        def from_attributes(attributes) # DISCUSS: better move to #new? how do we handle the original #new then?
          new.tap do |representer|
            yield representer if block_given?
            attributes.each { |p,v| representer.public_send("#{p}=", v) }
          end
        end
      end
      
      
      # Convert representer's attributes to a nested attributes hash.
      def to_attributes
        {}.tap do |attributes|
          self.class.representable_attrs.each do |definition|
            value = public_send(definition.getter)
            
            if definition.typed?
              value = definition.apply(value) do |v|
                v.to_attributes  # applied to each typed attribute (even in collections).
              end
            end
            
            attributes[definition.name] = value
          end
        end
      end
    
    private
      def before_serialize(*)
      end
      
      # Returns block used in #from_json and #from_xml to filter incoming arguments.
      # This method is subject to change and might be removed, soon.
      def deserialize_block_for_options(options)
        return unless props = options[:except] || options[:include]
        props.collect!{ |name| name.to_s }
        
        lambda do |bind| 
          res = props.include?(bind.definition.name)
          options[:include] ? res : !res
        end
      end
      
    end
  end
end

Version data entries

2 entries across 2 versions & 1 rubygems

Version	Path
roar-0.8.2	lib/roar/representer/base.rb
roar-0.8.1	lib/roar/representer/base.rb