javascript - Joi 验证器只有一个键

Question

我正在开发一个应该允许多个参数的 api，但对于其中的三个，我只想允许其中一个。 每个键的值更容易，但我想知道 Joi 是否也允许它，或者我应该在我的服务器中添加额外的验证逻辑。

简而言之，对于键 a、b 或 c 我想使任何具有三个以上之一的请求失败，所以:

1. http://myapi.com/?a=value 是有效请求。

2. http://myapi.com/?b=value&c=value2 无效。

谢谢!

Answer 1

您正在寻找 object.xor(peers)如果恰好需要 a、b 或 c 之一。

Defines an exclusive relationship between a set of keys where one of them is required but not at the same time where:

• peers - the exclusive key names that must not appear together but where one of them is required. peers can be a single string value, an array of string values, or each peer provided as an argument.

const schema = Joi.object().keys({
    a: Joi.any(),
    b: Joi.any(),
    c: Joi.any()
}).xor('a', 'b', 'c');

或者，object.oxor(peers)如果仅允许 a、b 或 c 之一，但都不是必需的。

Defines an exclusive relationship between a set of keys where only one is allowed but none are required where:

• peers - the exclusive key names that must not appear together but where none are required.

const schema = Joi.object().keys({
    a: Joi.any(),
    b: Joi.any(),
    c: Joi.any()
}).oxor('a', 'b', 'c');