Example Controller Service Object

base.rb

module Workflows
  class Base
    attr_reader :errors

    def self.call(*args)
      new(*args).call
    end

    def initialize(params)
      @params   = __params(params)
    end

    def call
      raise NotImplementedError
    end

    private
    def __params(p)
      p.respond_to?(:to_unsafe_hash) ? p.to_unsafe_hash.deep_symbolize_keys : p.deep_symbolize_keys
    end
  end
end

common.rb

module Workflows
  module Events
    module Common
      def event_params
        @params.slice(:active, :venue_id, :name, :featured, :description, :details, :seating, :seating_chart_id)
      end
    end
  end
end

create.rb

module Workflows
  module Events
    class Create < Workflows::Base
      include Workflows::Events::Common
      attr_accessor :event

      def call
        ActiveRecord::Base.transaction {create}
      rescue ActiveRecord::RecordInvalid => exception
        @errors = @event.errors
        return false
      end

      def create
        @event = Event.create!(event_params)

        return @event.valid? && create_venue && create_users
      end
      
      private
      def create_venue
        @event.create_venue!(venue_params)
      end
      
      def create_users
        @event.users.create!(user_params)
      end
    end
  end
end

events_controller.rb

class EventsController < ApplicationController

  def create
    transactor = Workflows::Events::Create.new(params)
    if transactor.call
      render json: transactor.event
    else
      render json: transactor.errors
    end
  end

end