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protected static $zero_fields = ['field1', 'field2', ...];

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public function save(array $data = [], $where = [], $sequence = null)
{
    foreach (self::$zero_fields as $field) {
        if (!isset($data[$field])) {
            $data[$field] = 0;
        }
    }
    return parent::save($data, $where, $sequence);
}

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