IS_IN_DB; orderby with literal field not works if field has rname

[Ayunken]

I used requires IS_IN_DB always this way:

db.define_table('tipo',Field('name'))
db.define_table('otra',
Field('um',db.mod_um,label='U.Medida',default=1,requires=IS_IN_DB(db,db.tipo,'%(name)s',orderby='name')))

but if referenced table has name field with rname translation, not works, dal uses directly name as field, ignoring rname translation.

db.define_table('tipo',
Field('name', rname='description'))

db.tipo.name instead of 'name' is needed:

db.define_table('otra',
Field('um',db.mod_um,label='U.Medida',default=1,requires=IS_IN_DB(db,db.tipo,'%(name)s',orderby=db.tipo.name)))