I'm a beginner who is guessing, but I don't see the IS_IN_DB in the requires clauses. Can you try that?
db.yourTable.yourField.requires = IS_NULL_OR(IS_IN_DB(db, db.otherTable.otherField, '%(fieldName)s',zero=T('choose one'))) -- Resources: - http://web2py.com - http://web2py.com/book (Documentation) - http://github.com/web2py/web2py (Source code) - https://code.google.com/p/web2py/issues/list (Report Issues) --- You received this message because you are subscribed to the Google Groups "web2py-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to web2py+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.