I asked about this a while ago
here<http://groups.google.co.uk/group/web2py/browse_thread/thread/e9781e209f75e74a/9d121a7f79a1a995?lnk=gst&q=compound#9d121a7f79a1a995>
.
Hope it helps.
On Fri, Feb 5, 2010 at 8:46 AM, hywang <why00...@163.com> wrote:
> there is a table
> db.define_table('class_student', Field('class_name'),
> Field('student_name'))
>
> class_name + student_name should be unique in this table. How can
> validate the submitted data when user update or insert a record ?
>
> Thanks :-)
>
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