Module: DataMapper::GeoKit::ClassMethods

Defined in:
lib/dm-geokit/resource.rb

Instance Method Summary collapse

Instance Method Details

#has_geographic_location(name, options = {}) ⇒ Object Also known as: acts_as_mappable 



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# File 'lib/dm-geokit/resource.rb', line 10

def has_geographic_location(name, options = {})
  return if self.included_modules.include?(DataMapper::GeoKit::InstanceMethods)
  send :include, InstanceMethods
  send :include, ::GeoKit::Mappable

  if defined?(DataMapper::Validations)
    # since we return a custom object when this property is called, it breaks
    # when dm-validations is included, so we set auto_validation to false if
    # dm-validations is loaded
    property name.to_sym, String, :length => 255, :auto_validation => false
  else
    property name.to_sym, String, :length => 255
  end
  property "#{name}_distance".to_sym, Float

  PROPERTY_NAMES.each do |p|
    if p.match(/l(at|ng)/)
      property "#{name}_#{p}".to_sym, Float, :precision => 15, :scale => 12, :index => true
    else
      property "#{name}_#{p}".to_sym, String, :length => 255
    end
  end

  if options[:auto_geocode] == true or options[:auto_geocode].nil?
    define_method :auto_geocode? do
      true
    end
  else
    define_method :auto_geocode? do
      false
    end
  end

  define_method "#{name}" do
    if attribute_get(name.to_sym).nil?
      nil
    else
      GeographicLocation.new(name, self)
    end
  end

  define_method "#{name}=" do |value|
    if value.nil?
      nil
    elsif value.is_a?(String)
      if auto_geocode?
        geo = ::GeoKit::Geocoders::MultiGeocoder.geocode(value)
        if geo.success?
          attribute_set(name.to_sym, geo.full_address)
          PROPERTY_NAMES.each do |p|
            attribute_set("#{name}_#{p}".to_sym, geo.send(p.to_sym))
          end
        end
      else
        attribute_set(name.to_sym, value)
      end
    end
  end
end