Module: ActiveSupport::CoreExtensions::Hash::Conversions

Included in:
Hash
Defined in:
lib/active_support/core_ext/hash/conversions.rb

Defined Under Namespace

Modules: ClassMethods

Constant Summary collapse

XML_TYPE_NAMES = 
{
  "Fixnum"     => "integer",
  "Bignum"     => "integer",
  "BigDecimal" => "numeric",
  "Float"      => "float",
  "Date"       => "date",
  "DateTime"   => "datetime",
  "Time"       => "datetime",
  "TrueClass"  => "boolean",
  "FalseClass" => "boolean"
}
XML_FORMATTING = 
{
  "date"     => Proc.new { |date| date.to_s(:db) },
  "datetime" => Proc.new { |time| time.xmlschema },
  "binary"   => Proc.new { |binary| Base64.encode64(binary) }
}

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.included(klass) ⇒ Object 



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# File 'lib/active_support/core_ext/hash/conversions.rb', line 26

def self.included(klass)
  klass.extend(ClassMethods)
end

Instance Method Details

#to_xml(options = {}) ⇒ Object 



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# File 'lib/active_support/core_ext/hash/conversions.rb', line 30

def to_xml(options = {})
  options[:indent] ||= 2
  options.reverse_merge!({ :builder => Builder::XmlMarkup.new(:indent => options[:indent]),
                           :root => "hash" })
  options[:builder].instruct! unless options.delete(:skip_instruct)
  dasherize = !options.has_key?(:dasherize) || options[:dasherize]
  root = dasherize ? options[:root].to_s.dasherize : options[:root].to_s

  options[:builder].__send__(:method_missing, root) do
    each do |key, value|
      case value
        when ::Hash
          value.to_xml(options.merge({ :root => key, :skip_instruct => true }))
        when ::Array
          value.to_xml(options.merge({ :root => key, :children => key.to_s.singularize, :skip_instruct => true}))
        when ::Method, ::Proc
          # If the Method or Proc takes two arguments, then
          # pass the suggested child element name.  This is
          # used if the Method or Proc will be operating over
          # multiple records and needs to create an containing
          # element that will contain the objects being
          # serialized.
          if 1 == value.arity
            value.call(options.merge({ :root => key, :skip_instruct => true }))
          else
            value.call(options.merge({ :root => key, :skip_instruct => true }), key.to_s.singularize)
          end
        else
          if value.respond_to?(:to_xml)
            value.to_xml(options.merge({ :root => key, :skip_instruct => true }))
          else
            type_name = XML_TYPE_NAMES[value.class.name]

            key = dasherize ? key.to_s.dasherize : key.to_s

            attributes = options[:skip_types] || value.nil? || type_name.nil? ? { } : { :type => type_name }
            if value.nil?
              attributes[:nil] = true
            end

            options[:builder].tag!(key,
              XML_FORMATTING[type_name] ? XML_FORMATTING[type_name].call(value) : value,
              attributes
            )
        end
      end
    end
  end

end