module GiftWrap::Presenter

Public Class Methods

included(base) click to toggle source
# File lib/gift_wrap/presenter.rb, line 4
def self.included(base)
  base.extend(ClassMethods)
  if GiftWrap.config.use_serializers? && defined? ActiveModel::Serializers::JSON
    base.send(:include, ActiveModel::Serializers::JSON)
  end
end
new(wrapped_object, **options) click to toggle source

Current options:

  • associations: a hash mapping association names to the presenter class to use when wrapping the association. Used to override the :with setting of a call to ::wrap_association at an instance level.

# File lib/gift_wrap/presenter.rb, line 16
def initialize(wrapped_object, **options)
  @wrapped_object                 = wrapped_object
  @wrapped_association_presenters = options.fetch(:associations, {})
end

Public Instance Methods

attributes() click to toggle source

For use by ActiveModel::Serializers::JSON in building a default set of values when calling as_json or to_json

# File lib/gift_wrap/presenter.rb, line 43
def attributes
  self.class.attributes.each.with_object({}) do |msg, attr_hash|
    attr_hash[msg.to_s] = self.send(msg)
  end
end
wrapped_association_presenter(association_name) click to toggle source

Used in methods defined by ::wrap_association to determine the presenter class that is used for a particular association name. First checks any instance-specific options for the association name, and falls back to those defined by the :with option passed to any ::wrap_association call for said association_name.

# File lib/gift_wrap/presenter.rb, line 26
def wrapped_association_presenter(association_name)
  if @wrapped_association_presenters.none?
    self.class.wrapped_association_defaults.fetch(association_name) do |name|
      raise NoMethodError.new("No association registered as '#{name}'.")
    end
  else
    @wrapped_association_presenters.fetch(
      association_name,
      self.class.wrapped_association_defaults.fetch(association_name) do |name|
        raise NoMethodError.new("No association registered as '#{name}'.")
      end)
  end
end