我在Symfony/5.4中有这个实体类:

use DoctrineORMMapping as ORM;
use SymfonyComponentValidatorConstraints as Assert;

class Assignments
{
    public const SALARY_RANGES = [
        'Red',
        'Green',
        null,
    ];

    /**
     * @ORMColumn(length=255, nullable=true)
     * @AssertChoice(choices=Assignments::SALARY_RANGES, strict=true)
     */
    private ?string $salaryRange;

    /**
     * @ORMManyToOne(targetEntity="Employee", inversedBy="assignments")
     * @ORMJoinColumn(name="employee_id", referencedColumnName="id", onDelete="CASCADE")
     */
    private ?Employee $employee;
}

我需要确保如果employee不为空，则salaryRange具有非空值，反之亦然。是否可以使用约束注解来强制实施这一要求?

我一直在尝试使用@AssertCallback，但我无法弄清楚如何获取其他字段的值。也许这甚至不是正确的工具。

/**
 * @AssertCallback({"ExampleValidator", "assertEmployeeOnlyCallback"})
 */

public static function assertEmployeeOnlyCallback(mixed $data, ExecutionContextInterface $context): void
{
    // `$data` contains value from `salaryRange` but, where is `employee`?
}