RecordAccessors
This incredibly simple gem solves this specific issue:
- http://stackoverflow.com/questions/1676200/listing-the-accessors-in-a-ruby-class
- http://stackoverflow.com/questions/2487333/fastest-one-liner-way-to-list-attr-accessors-in-ruby
It is useful for processing JSON payloads with PORO subclassing ActiveModelSerializers::Model, or any scenario where you need to track and query against the fields defined on a ruby class.
Installation
Add this line to your application's Gemfile:
gem 'record_accessors'Usage
class ShipmentSerializer < ActiveModelSerializers::Model
include RecordAccessors
attr_accessor :id, :order_id
def initialize(payload = {})
initialize_from_attributes(payload)
super(hash_from_attributes)
end
end
payload = {
id: 123,
order_id: 'R123',
other_field: 'this will be excluded from the serialized shipment'
}
shipment = ShipmentSerializer.new(payload)
render json: shipment