Class ActiveRecord::Validations::AssociatedValidator < ActiveModel::EachValidator

# File activerecord/lib/active_record/validations/associated.rb, line 4
def validate_each(record, attribute, value)
  return if (value.is_a?(Array) ? value : [value]).collect{ |r| r.nil? || r.valid? }.all?
  record.errors.add(attribute, :invalid, options.merge(:value => value))
end