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javascript - 如何使用 Joi 验证对象键的值是否应该出现在另一个对象中？

问题描述

我正在使用Joi进行对象标记。
假设我的对象是 

global_object = [
    {"id": 1, "name": "Alok"},
    {"id": 2, "name": "Ajay"},
    {"id": 3, "name": "Ankit"},
]

// valid object because id is present in global_object
object1 = {
    "id": 2,
    "country": "India"
}

// invalid object because id is not present in global_object
object2 = {
    "id": 7,
    "country": "India"
}

我想为此添加验证，object1并且object2该值id应该存在于global_objectusing 中joi。

标签： javascriptjsonvalidationobjectjoi

解决方案

This can be possible using Joi.any().valid() 

var schema = Joi.object({
    id: Joi.any().valid(...global_object.map(e=>e['id'])),
    country: Joi.string()
})

console.log(schema.validate(object1)) // valid case
console.log(schema.validate(object2)) // this will show error as its invalid

Here are output 

> console.log(schema.validate(object1))
{ value: { id: 2, country: 'India' } }
undefined
> console.log(schema.validate(object2))
{ value: { id: 7, country: 'India' },
  error:
   { ValidationError: "id" must be one of [1, 2, 3]
     _original: { id: 7, country: 'India' },
     details: [ [Object] ] } }
undefined
>

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