null when ? can you give a full table definition and the operation you're
trying to do that returns None ?
On Wednesday, June 19, 2013 8:27:40 PM UTC+2, greenpoise wrote:
>
> how come this returns null:
>
> Field('seriesnumber',compute=lambda r: '%s%s'%
> (r['id'],r['seriesname'][0:3]))
>
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