Module: Minimapper::Entity::SerializedAssociation

Included in:
Attributes::ClassMethods
Defined in:
lib/minimapper/entity/serialized_association.rb

Instance Method Summary collapse

Instance Method Details

#serialized_association(name, entity_class_or_proc = nil) ⇒ Object 



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# File 'lib/minimapper/entity/serialized_association.rb', line 8

def serialized_association(name, entity_class_or_proc = nil)
  attribute_name = "#{name}_attributes"
  attribute attribute_name
  define_method(name) do                                          # def foo
    attributes = public_send(attribute_name) || {}                #  attributes = foo_attributes
    entity = instance_variable_get("@#{name}")                    #  entity = @foo

    if entity_class_or_proc.is_a?(Proc)
      entity ||= instance_exec(attributes, &entity_class_or_proc) # call proc in instance context
    else
      entity_class = entity_class_or_proc ||
        name.to_s.camelcase.constantize

      entity ||= entity_class.new(attributes)                     # entity ||= Foo.new(attributes)
    end

    instance_variable_set("@#{name}", entity)                     # @foo = entity
  end
end