atk4\data\Persistence_SQL::update PHP Method

    public function update(Model $m, $id, $data)
    {
        $update = $this->initQuery($m);
        $update->mode('update');
        $data = $this->typecastSaveRow($m, $data);
        // only apply fields that has been modified
        $update->set($data);
        $update->where($m->getElement($m->id_field), $id);
        $st = null;
        try {
            $m->hook('beforeUpdateQuery', [$update]);
            if ($data) {
                $st = $update->execute();
            }
        } catch (\PDOException $e) {
            throw new Exception(['Unable to update due to query error', 'query' => $update->getDebugQuery(false), 'model' => $m, 'conditions' => $m->conditions], null, $e);
        }
        if ($m->id_field && isset($data[$m->id_field]) && $m->dirty[$m->id_field]) {
            // ID was changed
            $m->id = $data[$m->id_field];
        }
        $m->hook('afterUpdateQuery', [$update, $st]);
        // if any rows were updated in database, and we had expressions, reload
        if ($m->reload_after_save === true && (!$st || $st->rowCount())) {
            $d = $m->dirty;
            $m->reload();
            $m->_dirty_after_reload = $m->dirty;
            $m->dirty = $d;
        }
    }