Virtus

virtus-test.rb

require 'bundler/setup'
require 'active_model'
require 'active_support/concern'
require 'virtus'

module EventParams
  include Virtus.module
  extend ActiveSupport::Concern
  include ActiveModel::Validations

  attribute :event_params

  included do
    validate :validate_event_params
  end

  def validate_event_params
    if event_params
      errors.add(:event_params, 'Should have at least one event parameter') if event_params[:phone_numbers].blank?
    end
  end
end

class Event
  include EventParams
end

puts Event.new(event_params: {phone_numbers: ['1235554567']}).valid?