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Is there a way to validate strings that represent nested object keys in Joi?

I'm using joi@^17.4.0 and have a schema that looks like this:

settings: Joi.object({
  isHidden: Joi.boolean(),
  payoutData: Joi.object({
    email: Joi.string().email(),
  }),
}),

I would like to input the string 'settings.isHidden' or 'settings.payoutData.email' without hard coding each of these strings in the schema. Is there a way that I can make joi know that these strings are valid based on the object schema I already have? Currently, when I try to validate these strings I get a validation error that says those keys are not allowed.

Example object to validate:

{ 'settings.isHidden': false }

7 months ago · Juan Pablo Isaza

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Answer 1 · 2022-07-05T08:41:38.310Z

Your Joi schema:

settings: Joi.object({
  isHidden: Joi.boolean(),
  payoutData: Joi.object({
    email: Joi.string().email(),
  }),
}),

says that settings (presumably a property of an object) is an object that has two properties:

isHidden, a boolean, and
payoutData, an object with the property email, a string

Your example object

{ 'settings.isHidden': false }

is an object with a single property settings.isHidden and it so fails validation.

Ergo, your object fails validation against the schema.