my exact code :
def on_define_default_size(table):
# compute
#table.total_square_meter.compute = lambda r: (float(r['length_in_cm'] ) *
float(r['width_in_cm'] ) ) / 1
# label
table.name.label = T('Name')
table.length_in_cm.label = T('Length in Cm')
table.width_in_cm.label = T('Width in Cm')
t
Are you showing your exact code, because the particular error reported will
only appear if the computed field is required, and you have not set the
total_square_meter field to be required?
Anthony
On Saturday, January 23, 2016 at 9:31:18 PM UTC-5, 黄祥 wrote:
>
> still face the same error :
> e.g
I think the main point is that for a computed field you need to pass fields
which happens to be the factors of the calculation: how can pydal compute
the value if you don't pass the actual values are needed to compute ???
that being said, if you are using database callbacks you can just use that
still face the same error :
e.g.
db.define_table('default_size',
Field('name'),
Field('length_in_cm', 'double'),
Field('width_in_cm', 'double'),
Field('total_square_meter', 'double'),
Field('acquisition_price', 'integer') )
db.default_size.total_square_meter.compute = lambda r:
(float(r['length_
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