Symfony，如何将不在表单上的字段添加到数据库

use Doctrine\ORM\Mapping as ORM;

/**
 * @ORM\Entity
 */
class YourEntity
{
    // ...

    /**
     * @ORM\Column(type="string")
     */
    private $extraField;

    // ...
}

php bin/console doctrine:migrations:diff
php bin/console doctrine:migrations:migrate

use Symfony\Component\Form\AbstractType;
use Symfony\Component\Form\FormBuilderInterface;
use Symfony\Component\OptionsResolver\OptionsResolver;

class YourFormType extends AbstractType
{
    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $builder
            ->add('field1')
            ->add('field2')
            // ...
            // Add other fields except extraField
            // ...
        ;
    }

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