data_transformers.yaml

questions:
  -
    uuid: 1eebf878-8b9a-6838-a655-99d84c92580c
    question: 'Does a Symfony\Component\Form\Exception\TransformationFailedException thrown in a DataTransformer cause a validation error ?'
    answers:
      - { value: 'Yes', correct: true }
      - { value: 'No', correct: false }
    help: 'https://symfony.com/doc/current/form/data_transformers.html'
  -
    uuid: 1eebf878-8b9c-6aa2-a4b0-99d84c92580c
    question: 'How to add a DataTransformer to the tags field?'
    answers:
      - { value: "$builder->add('tags', TextType::class)->addModelTransformer(...);", correct: false }
      - { value: "$builder->add($builder->create('tags',TextType::class)->addModelTransformer(...));", correct: true }
      - { value: "$builder->add('tags', TextType::class); $builder->get('tags')->addModelTransformer(...);", correct: true }
    help: 'https://symfony.com/doc/current/form/data_transformers.html#simple-example-transforming-string-tags-from-user-input-to-an-array'
  -
    uuid: 1eebf878-8ba0-6116-964a-99d84c92580c
    question: 'How to Use Data Transformers ?'
    answers:
      - { value: "$builder->get('tags')->addModelTransformer(...);", correct: true }
      - { value: "$builder->add($builder->create('tags', TextType::class)->addModelTransformer(...));", correct: true }
      - { value: "$builder->add('tags', TextType::class)->addModelTransformer(...);", correct: false }
    help: 'https://symfony.com/doc/current/form/data_transformers.html'
  -
    uuid: 1eebf878-8ba4-6946-9ff1-99d84c92580c
    question: 'Are data transformers applied to a form field that has the inherit_data option set?'
    answers:
      - { value: 'Yes', correct: false }
      - { value: 'No', correct: true }
    help: 'https://symfony.com/doc/current/form/data_transformers.html'
  -
    uuid: 1eebf878-8ba5-6382-a6c5-99d84c92580c
    question: "Is this a valid way to add a DataTransformer ? $builder->add('issue', TextType::class)->addModelTransformer($transformer);"
    answers:
      - { value: 'Yes', correct: false }
      - { value: 'No', correct: true }
    help: 'https://symfony.com/doc/current/form/data_transformers.html#using-the-transformer'
  -
    uuid: 1eebf878-8ba5-63c8-9923-99d84c92580c
    question: 'In the CallbackTransformer, the first function is used to transform the data and the second function is used to reverse-transform it. Is that right ?'
    answers:
      - { value: 'No', correct: false }
      - { value: 'Yes', correct: true }
    help: 'https://github.com/symfony/symfony/blob/7.0/src/Symfony/Component/Form/CallbackTransformer.php'
  -
    uuid: 1eebf878-8ba5-6418-8750-99d84c92580c
    question: 'What Exception is thrown when data is not valid in the DataTransformer ?'
    answers:
      - { value: FailedTransformationException, correct: false }
      - { value: DataTransformationException, correct: false }
      - { value: ValidTransformationException, correct: false }
      - { value: TransformationFailedException, correct: true }
    help: 'https://symfony.com/doc/current/form/data_transformers.html#creating-the-transformer'
  -
    uuid: 1eebf878-8ba5-645e-bb9b-99d84c92580c
    question: 'In Data Transformer, in the reverseTransform, how to customize the error message ?'
    answers:
      - { value: 'By setting the setInvalidMessage on the TransformationFailedException', correct: true }
      - { value: 'By setting the invalid_message in the options of the form type', correct: true }
      - { value: "It's not possible", correct: false }
    help: 'https://symfony.com/doc/current/form/data_transformers.html#using-the-transformer'