class-validator 如何校验多个字段必有一个字段？ - V2EX

class-validator 如何校验多个字段必有一个字段？ - V2EX

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这是一个创建于 1304 天前的主题，其中的信息可能已经有所发展或是发生改变。

例如，一个 dto 有 Field1 和 Field2,用 class-validator 如何校验这两个字段必有其中一个。

class-validator

3 条回复 2022-03-22 18:34:25 +08:00

1

JohnDenver

2022-03-22 17:55:40 +08:00

```ts
{
@ValidateIf(item => !!item.a || !!item.b)
a?: number;

@ValidateIf(item => !!item.a || !!item.b)
b?: number;
}
```

2

wolfie

2022-03-22 18:28:46 +08:00

自定义实现 javax.validation.ConstraintValidator

3

itechify

PRO

2022-03-22 18:34:25 +08:00 via Android

@wolfie node.js

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