I am currently getting the error below:
*<class 'sqlite3.OperationalError'> no such column: fuelLogging.ODO_Reading*
The problem is where i Highlighted
def fuelLogging_before_update(*args, **kwargs):
db.fuelLogging.Delta.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())
I still have a hardtime getting results
On Friday, January 18, 2019 at 8:43:36 AM UTC+2, mostwanted wrote:
>
> 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 NO 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 in-case 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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