Hi,

I have a table with 3 fields:

db.define_table('mytable', Field('in_time','datetime'),
Field('duration', 'integer'), Field('end_time','datetime'))

The user enters in_time and duration (in hours) in SQLFORM, but now I
want to calculate and store end_time using
end_time = in_time + timeinterval(hours = duration).

I'm not able to achieve this. How do I refer to a record's other
fields to specify default value of a field?

Thanks.

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