getErrorMessages example

protected $errorMessages;

    /** * @param Error[] $errors */
    public function __construct(
        ProductExportEntity $productExportEntity,
        array $errors
    ) {
        $errorMessages = array_merge(
            ...array_map(
                fn (Error $error) => $error->getErrorMessages(),
                $errors
            )
        );

        $this->errorMessages = $errorMessages;

        parent::__construct(
            sprintf(
                'Export file generation for product export %s (%s) resulted in validation errors',
                $productExportEntity->getId(),
                $productExportEntity->getFileName()
            ),

    #[Route(path: '/api/_action/product-export/validate', name: 'api.action.product_export.validate', methods: ['POST'])]     public function validate(RequestDataBag $dataBag, Context $context): JsonResponse
    {
        $result = $this->generateExportPreview($dataBag, $context);

        if ($result && $result->hasErrors()) {
            $errors = $result->getErrors();
            $errorMessages = array_merge(
                ...array_map(
                    fn (Error $error) => $error->getErrorMessages(),
                    $errors
                )
            );

            return new JsonResponse(
                [
                    'content' => mb_convert_encoding(
                        $result->getContent(),
                        'UTF-8',
                        $dataBag->get('encoding')
                    ),
                    

/** * @return ErrorMessage[] */
    abstract public function getErrorMessages(): array;

    public function jsonSerialize(): array
    {
        $data = get_object_vars($this);
        $data['key'] = $this->getId();
        $data['message'] = $this->getMessage();
        $data['messageKey'] = $this->getMessageKey();
        $data['errorMessages'] = $this->getErrorMessages();

        return $data;
    }
}