Array Indexing

You can validate specific elements within arrays using bracket notation. For instance, to validate the first element of the contacts array, use contacts[0]. You can also specify nested properties like user.contacts[0].value.

Example

Request Body

{
  "contacts": [
    {
      "type": "email",
      "value": "john.doe@example.com"
    },
    {
      "type": "phone",
      "value": "123-456-7890"
    }
  ]
}

Validation Rules

const rules = [
  {
    key: "user.contacts[0]",
    type: "object",
    required: true,
  },
  {
    key: "user.contacts[0].type",
    type: "string",
    required: true,
  },
  {
    key: "user.contacts[0].value",
    type: "string",
    required: true,
  },
];

Explanation

• key: "user.contacts[0]" targets the first element of the contacts array within the user object.

• type: "object" indicates that this array element should be an object.

• required: true means that this array element is mandatory.

• key: "user.contacts[0].type" validates the type property of the first element in the contacts array.

• type: "string" specifies that the type should be a string.

• required: true means that the type property is required.

• key: "user.contacts[0].value" validates the value property of the first element in the contacts array.

• type: "string" specifies that the value should be a string.

• required: true means that the value property is required.