How To Validate Nested Object Whose Keys Should Match With Outer Objects Another Key Whose Value Is Array Using Joi?

I have object which I want to validate. // valid object because all values of keys are present in details object var object = { details: { key1: 'stringValue1',

Solution 1:

Using object.pattern and array.length

var schema = Joi.object({
  details: Joi.object().pattern(Joi.in('keys'), Joi.string()),
  keys: Joi.array().length(Joi.ref('details', {
      adjust: (value) => Object.keys(value).length
    }))
});

stackblitz

Solution 2:

You can validate the array(if you want) then make a dynamic schema and validate that.

const arrSchema = Joi.object({
    keys: Joi.array()
});

then,

const newSchema = Joi.object({
    details: Joi.object().keys(data.keys.reduce((p, k) => {
        p[k] = Joi.string().required();
        return p;
    },{})),
    keys: Joi.array()
})

This should probably do it.

You have to set allowUnknown: true in validate() option.