>
> 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!
>

Yes, of course.

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