Module: GiftWrap::Presenter

Defined in:
lib/gift_wrap/presenter.rb

Defined Under Namespace

Modules: ClassMethods

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.included(base) ⇒ Object 



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# 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

Instance Method Details

#attributes ⇒ Object

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



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# 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

#initialize(wrapped_object, **options) ⇒ Object

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.



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# File 'lib/gift_wrap/presenter.rb', line 16

def initialize(wrapped_object, **options)
  @wrapped_object                 = wrapped_object
  @wrapped_association_presenters = options.fetch(:associations, {})
end

#wrapped_association_presenter(association_name) ⇒ Object

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.



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# 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