objectProperties.md

id	title
objectProperties	Object Properties

Object properties can be validated by way of the .setValidator rule.

The documentation page for the .setValidator rule contains several examples that demonstrate the different ways in which you can use it, as well as a full API reference which outlines everything in detail.

The Gist

You can validate an object property using the built-in rules:

this.ruleFor('pet')
  .notNull()
  .must(pet => pet.age >= 0)
  .must(pet => pet.name !== '');

Alternatively, you can define a validator for the type of the object property:

class PetValidator extends Validator<Pet> {
  constructor() {
    super();
    this.ruleFor('age').greaterThanOrEqualTo(0);
    this.ruleFor('name').notEmpty();
  }
}

const petValidator = new PetValidator();

This can then be passed in with the .setValidator rule:

this.ruleFor('pet')
  .notNull()
  .setValidator(() => petValidator);