Hey Anthony, my delta value still returns 0, its set default value,
*MODEL*
def fuelLogging_before_update(*args, **kwargs):
db.fuelLogging.compute = lambda r: (db.fuelLogging.ODO_Reading * -1) + r
.ODO_Reading
db.define_table('fuelLogging',
Field('ODO_Reading', 'integer'),
Field('Delta', 'integer', default=0))
db.fuelLogging._before_update.append(fuelLogging_before_update)
but let me ask this, isn't the formula for our fuelLogging_before_update()
function supposed to be:
*db.fuelLogging.Delta.compute = lambda r: (db.fuelLogging.ODO_Reading * -1)
+ r.ODO_Reading*
considering that we are trying to make updates to the *Delta *value?? Just
wondering!
I want to believe my controller must be straight forward with special
formulas
*CONTROLLER*
def viewLog():
details=db(db.fuelLogging).select(db.fuelLogging.ALL)
return locals()
*VIEW*
{{extend 'layout.html'}}
{{for details in details:}}
ODO Reading: {{=details.ODO_Reading}}<br />
Delta: {{=details.Delta}}<br />
{{pass}}
Nonetheless my delta value is still being returned as 0
I wanted to show my whole code incase i am missing something somewhere, its
my first time using *callbacks on records*, i am not at all familiar with
them!
Mostwanted
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