class UserCompany(db.Document, TransitionalDatabaseMixin):
    '''
    A company that our users belong to. Not to be confused with
    companies that are offering positions.
    '''
    # Classic getter with no filtering.
    @classmethod
    def get_by_ats_id(cls, ats_id):
        return cls.objects(ats_id=ats_id).first()

    # Provide a getter that supports filtering.
    # The naming convention implies the getter filters.
    # The downside here is that we need to name a filtered getter for every
    # getter we define.
    @classmethod
    def get_by_ats_id_with_limits(cls, ats_id, *limits):
        return cls.objects(ats_id=ats_id).only(*limits)

    # An alternate solution is to keep our default named getter and have an
    # optional list of filters that maybe be defined.  The caller may now use
    # the same getter when they want all fields or just a subset.
    @classmethod
    def get_by_ats_id(cls, ats_id, limits=[]):
        return cls.objects(ats_id=ats_id).only(*limits)