module ActiveRecord::Associations::Builder
  class HasManyForActiveModel < HasMany
    p ActiveRecord.version
    p ActiveRecord.version >= Gem::Version.new("5.0.0.beta")
    if ActiveRecord.version >= Gem::Version.new("5.0.0.beta")
      AR_CALLBACK_METHODS = %i(define_callback before_validation after_validation before_save after_save before_update after_update)

      def self.valid_options(_options)
        super + [:active_model, :target_ids] - [:through, :dependent, :source, :source_type, :counter_cache, :as]
      end

      def self.define_callbacks(model, reflection)
        if AR_CALLBACK_METHODS.all? { |meth| self.respond_to?(meth) }
          super
        end
      end
    else
      def valid_options
        super + [:active_model, :target_ids] - [:through, :dependent, :source, :source_type, :counter_cache, :as]
      end
    end
  end
end