Use new ActiveModel::SerializableResource

[nikolai-b]

as_json does not work with the newest version of https://github.com/rails-api/active_model_serializers and it is suggested that you use the ActiveModel::SerializableResource class.

[bf4]

coming here from: rails-api/active_model_serializers#1321 (comment)

could be a little more efficient by just defining a different method per version

if ActiveModel::Serializer::VERSION.start_with?('0.9.')
        def serializable_hash(options = {})
          instance = serializer.new(object, options)
          if instance.respond_to?(:serializable_hash)
            instance.serializable_hash
          else
            instance.as_json options
          end
        end
elsif ActiveModel::Serializer::VERSION.start_with?('0.10.')
  defined?(ActiveModel::SerializableResource) or fail "Your ActiveModelSerializers is too old. Please update to the latest minor or patch release."
  def serializable_hash(options = {})
    ActiveModel::SerializableResource.new(object, options.merge(serializer: serializer)).serializable_hash
  end
else
  fail ArgumentError, "We don't know how to serialize in #{ActiveModel::Serializer::VERSION}"
end

[bf4]

This stems partly from the super loose constraint in the Gemfile

gem 'active_model_serializers', ENV['AMS_VERSION'] || '> 0.0'

(I'm guessing it's a soft dependency?)