Joi conditional validation

joi.js

const joi = require("joi");

// const schema = joi.object({
//     roomIds: joi.array()
//         .required()
//         .min(1)
//         .max(6)
//         .sparse()
//         .items(joi.string())
// }).keys({
//     searchCode: joi.string()
//         .when("$roomSearchCode", {
//             is: joi.boolean()
//                 .valid(false)
//                 .required(),
//             then: joi.required(),
//             otherwise: joi.optional()
//         }),
//     hotelId: joi.string()
//         .when("$roomSearchCode", {
//             is: joi.boolean()
//                 .valid(false)
//                 .required(),
//             then: joi.required(),
//             otherwise: joi.optional()
//         }),
//     roomSearchCode: joi.string()
//         .when("$roomSearchCode", {
//             is: joi.boolean()
//                 .valid(true)
//                 .required(),
//             then: joi.required(),
//             otherwise: joi.optional()
//         })
// });

const schema = joi.object({
    roomIds: joi.array()
        .required()
        .min(1)
        .max(6)
        .sparse()
        .items(joi.string()),
    searchCode: joi.string()
        .when("$roomSearchCode", {
            is: joi.boolean()
                .valid(false)
                .required(),
            then: joi.required(),
            otherwise: joi.optional()
        }),
    hotelId: joi.string()
        .when("$roomSearchCode", {
            is: joi.boolean()
                .valid(false)
                .required(),
            then: joi.required(),
            otherwise: joi.optional()
        }),
    roomSearchCode: joi.string()
        .when("$roomSearchCode", {
            is: joi.boolean()
                .valid(true)
                .required(),
            then: joi.required(),
            otherwise: joi.optional()
        })
});

const body = {
  roomIds: ["1"],
  searchCode: "dasdasd",
  roomSearchCode: "dasdasd",
  hotelId: "adasdas"
}
// const body = {
//   roomIds: ["1"],
//   roomSearchCode: null
// }
// const body = {
//   roomIds: ["1"]
// }

const validationResult = joi.validate(
    body,
    schema,
    { context: { roomSearchCode: Object.prototype.hasOwnProperty.call(body, "roomSearchCode") } }
);

console.log(validationResult);