More info needed as MI says. Based on whats available why not do it as
a beforeSave? Only one expensive write to your DB then.
function beforeSave()
{
// assuming your data is in $this->data
$this->data[MODELNAME]['total'] = $this->data[MODELNAME]['price'] *
$this->data[MODELNAME]['quantity'];
// v important to do the return true otherwise the beforeSave fails.
return true;
}
More on beforeSave in the manual
ian
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