Symfony錯誤選項“約束”不存在

Symfony問題，我剛剛開始學習它。用戶上傳一個檔案，其中包含我想以陣列（鍵值）的形式提交到表單以進行驗證的資料。我呼叫該方法來構建表單，在那里傳遞一個陣列并嘗試檢查，例如，標題（'title'）的長度是否不超過 255 個字符。拋出錯誤“選項“約束”不存在”。

匯入服務.php

<?php

namespace App\Service;

use App\Entity\Import;  
use App\Service\ServiceInterface;  
use Box\Spout\Reader\Common\Creator\ReaderEntityFactory;  
use Symfony\Component\Form\Forms;  
use Doctrine\Persistence\ManagerRegistry; 
use Symfony\Component\Form\Form;

class ImportService implements ServiceInterface {
    public function __construct(protected ManagerRegistry $doctrine)
    {
    }
 
    public function parse(Import $import, array $scheme, array $formOptions = [])
    {
        $rowArray = [];

        $reader = ReaderEntityFactory::createXLSXReader();
        $reader->open($import->getPath());
        foreach ($reader->getSheetIterator() as $index => $sheet) {
            foreach ($sheet->getRowIterator() as $rowIndex => $row) {
                if ($rowIndex == 1) {
                    continue;
                } else {
                    $cells = $row->getCells();
                    foreach ($cells as $cell) {
                        $rowArray[] = $cell->getValue();
                    };

                    $row = array_combine($scheme, $rowArray);

                    $importRow = new ImportRow($import, $sheet, $rowIndex, $row);

                    $form = $this->buildForm($import->getFormType());
                    $form->submit($row);

                    if ($form->isValid()) {
                        $import->setSuccess('true');
                        $this->saveImport($import);

                        return $row;
                    }
                }
            };
        }
    }

    protected function buildForm(string $formType, array $formOptions = []): Form
    {
        $formFactory = Forms::createFormFactory();

        return $formFactory
            ->create(
                $formType,
                null,

            );
    }

NewsImportType.php

use App\Entity\News; use Symfony\Component\Form\AbstractType;  
use Symfony\Component\Form\FormBuilderInterface;  
use Symfony\Component\OptionsResolver\OptionsResolver;  
use Symfony\Component\Form\Extension\Core\Type\TextType; 
use Symfony\Component\Form\Extension\Core\Type\TextareaType; 
use Symfony\Component\Validator\Constraints\Collection; 
use Symfony\Component\Validator\Constraints\Email; 
use Symfony\Component\Validator\Constraints\Length; 
use Symfony\Component\Validator\Constraints\Url;

class NewsImportType extends AbstractType {

    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $builder
            ->add('title', TextType::class, [
                'constraints' =>
                [new Length(['max' => 256])],
            ])
            ->add('text', TextareaType::class, [
                'constraints' =>
                [new Length(['max' => 1000])],
            ])
            ->add('image', TextType::class, [
                'constraints' =>
                [
                    new Length(['max' => 256]),
                    new Url()
                ],
            ]);
    }

    public function configureOptions(OptionsResolver $resolver): void
    {
        $resolver->setDefaults([
            'allow_extra_fields' => true,
            'data_class' => News::class,
        ]);
    } }

錯誤文本

決議“Symfony\Component\Form\Extension\Core\Type\TextType”形式的選項時發生錯誤：選項“約束”不存在。定義的選項有：“action”、“allow_file_upload”、“attr”、“attr_translation_parameters”、“auto_initialize”、“block_name”、“block_prefix”、“by_reference”、“compound”、“data”、“data_class”、“disabled” ”、“empty_data”、“error_bubbling”、“form_attr”、“getter”、“help”、“help_attr”、“help_html”、“help_translation_parameters”、“inherit_data”、“invalid_message”、“invalid_message_parameters”、“is_empty_callback”、 “標簽”， ”

uj5u.com熱心網友回復：

如檔案中所述：

此選項添加在FormTypeValidatorExtension表單擴展中。

您可能忘記安裝Validator 組件：

composer require symfony/validator

uj5u.com熱心網友回復：

該constraints選項是核心表單擴展的一部分，ValidatorExtension而不是核心表單擴展的一部分。你可以像下面這樣使用它

$validator = Validation::createValidator();
$formFactory = Forms::createFormFactoryBuilder()
        ->addExtension(new ValidatorExtension($validator))
        ->getFormFactory();

還添加這個

use Symfony\Component\Form\Extension\Validator\ValidatorExtension;

詳情參考鏈接

uj5u.com熱心網友回復：

根據檔案，你必須有類似的東西：

->add('title', TextType::class, [
                'constraints' =>
                new Length(['max' => 256]),
            ])
            ->add('text', TextareaType::class, [
                'constraints' =>
                new Length(['max' => 1000]),
            ])
            ->add('image', TextType::class, [
                'constraints' =>
                [
                    new Length(['max' => 256]),
                    new Url()
                ],
            ]);

你把這個：

'constraints' =>
                [new Length(['max' => 256])],
            ])

醫生這樣說：

 'constraints' => new Length(['max' => 256]),

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