如何使用 Joi 验证自定义类型？

Question

假设我们有这样的 TypeScript 代码：

export class Dog {
  name = 'Fido'
  favoriteFood: Food | null = null
}

export class Food {
  name: string | null = null
}

export const DogSchema = Joi.object({
  name: Joi.string(),
  favoriteFood: Joi.object() // How to configure this correctly?? I would prefer to use FoodSchema in this line somehow
})

export const FoodSchema = Joi.object({
  name: Joi.string(),
})

const fido = new Dog()
fido.favoriteFood = new Food()
const res1 = DogSchema.validate(fido) // Gives no error!! 
const res2 = FoodSchema.validate(fido.favoriteFood) // Gives expected error: "name" must be a string

如何配置 Joi，以便在验证 fido 时也验证 fido 最喜欢的食物？

Answer 1

答案非常简单明了：

export const DogSchema = Joi.object({
  name: Joi.string(),
  favoriteFood: FoodSchema // Just put the schema here! 
})

谢谢 Ankh！