validation - Symfony 表单验证约束表达式

Question

我有表格，需要创建内联验证:

$builder
        ->add('Count1', 'integer', [
            'data'        => 1,
            'constraints' => [
                new NotBlank(),
                new NotNull(),
            ],
        ])
        ->add('Count2', 'integer', [
            'constraints' => [
                new NotBlank(),
                new NotNull(),
            ],
        ])
        ->add('Count3', 'integer', [
            'data'        => 0,
            'constraints' => [
                new NotBlank(),
                new NotNull(),
            ],
        ])

规则的白色内联验证表达式

计数 2 >=计数 1

计数3 <=计数2

Count2 >= $someVariable

Answer 1

使用 Expression Constraint 的其他解决方案对于情况 1 和 2。

use Symfony\Component\Validator\Constraints as Assert;

// ...

public function configureOptions(OptionsResolver $resolver)
{
    $resolver->setDefaults([
        'constraints' => [
            new Assert\Expression([
                'expression' => 'value["Count2"] >= value["Count1"]',
                'message' => 'count2 must be greater than or equal to count1'
            ]),
            new Assert\Expression([
                'expression' => 'value["Count3"] <= value["Count2"]',
                'message' => 'count3 must be less than or equal to count2'
            ]),
        ],
    ]);
}

对于情况 3，您可以使用 Assert\GreaterThanOrEqual直接约束 Count2 field 。

I guess your form doesn't have a binding object model, otherwise to read the documentation referred is enough and better because you could use these expression on your properties directly.