Nette\Database\Table\GroupedSelection::update PHP Method

    public function update($data)
    {
        $builder = $this->sqlBuilder;
        $this->sqlBuilder = clone $this->sqlBuilder;
        $this->where($this->column, $this->active);
        $return = parent::update($data);
        $this->sqlBuilder = $builder;
        return $return;
    }