mongoid/mongoid — pull request #3185 by joelcogen (2013-07-23 11:55:04+00:00)
Title: Add default_locale option to presence validator

This allows to only validate presence of a localized attribute in the default locale, e.g.:

validates :description, presence: { default_locale: true }

This is quite usefull when using fallbacks, because other locale keys might be present in the hash but you may not want to validate them.