使用joi对照另一个数组的长度验证一个数组的长度 [英] Validating an array's length against another array's length using joi

问题描述

是否可以使用joi验证两个数组的长度是否相同?

Is there a way to validate that two arrays need to have the same length using joi?

这是一个例子:

Joi.object().keys({
  firstNames: Joi.array().items(Joi.string()).single(),
  lastNames: Joi.array().items(Joi.string()).single(),
});

如果这行得通，它还应该匹配两个数组的长度，因此没有 firstName 缺少 lastName .

If that was to work, it should also match both array's length so no firstName lacks a lastName.

感谢您的帮助！

推荐答案

当然有，请查看

There certainly is, take a look at .assert(). You can use it to compare the values or attributes of two properties in your object.

对于您的示例，您可以执行以下操作:

For your example you can do this:

Joi.object().keys({
  firstNames: Joi.array().items(Joi.string()).single(),
  lastNames: Joi.array().items(Joi.string()).single(),
}).assert('firstNames.length', Joi.ref('lastNames.length'));

您还可以选择提供更有用的错误消息，作为 .assert()的第三个参数.

You can also optionally provide a more helpful error message as the third parameter of .assert().

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