rails 5 fast_jsonapi oj serializer

json_response.rb

# frozen_string_literal: true

require 'time_difference'

module JsonResponse
  extend ActiveSupport::Concern

  LOGGER = Logger.new("#{Rails.root}/log/fast_jsonapi.log")

  included do
  end

  module ClassMethods
    def api_action action_name, &block
      define_method action_name do
        json_response block.call
      end
    end
  end

  def json_response(resource, root = nil, status = :ok)
    if resource.is_a?(Hash) || resource.is_a?(Array)
      render json: resource, status: status

    else
      if !request.get? && resource.respond_to?(:errors) && resource.errors.any?
        status = :bad_request
      end

      render json: fast_json_for(resource, root), status: status
    end
  end

  def fast_json_for(resource, root=nil)
    serializer_klass = "#{controller_name.classify}Serializer".constantize

    t1 = Time.now
    data = serializer_klass.new(resource).to_h
    t2 = Time.now

    taken = "% 10.2f" % TimeDifference.between(t1, t2).in_ms
    klass_name = "% 20s" % controller_name.classify

    ::JsonResponse::LOGGER.info "|#{klass_name}|#{taken}|"

    return data unless root
    { root => data }
  end
end