Joi validate 2 schemas conditionally – Invalid schema content

Issue

I’m trying to add conidial schema according of the value of the isAdmin field in the request body, here is what I have so far:

import Joi from 'joi';
import entity from './entity';
import put from '../../self-serve/sources/put';

module.exports = Joi.when(Joi.ref('$isAdmin'), {
  is: true,
  then: Joi.object({
    params: {
      id: Joi.number().required()
        .integer()
        .min(1),
    },
    body: {
      ...entity,
      code: Joi.string().required(),
    },
  }),
  otherwise: Joi.object({
    params: {
      id: Joi.number().required()
        .integer()
        .min(1),
    },
    body: {
      ...put,
      code: Joi.string().required(),
    },
  }),
});

Inside ‘entity’ and ‘put’ I have other blocks of fields and declarations.
For some reason I get AssertionError [ERR_ASSERTION]: Invalid schema content error.
What am I missing? Thanks.

Solution

Try this

Joi.object({
  params: Joi.object({
    id: Joi.number().required().integer().min(1),
  }),
  body: Joi.object({
    code: Joi.string().required(),
  }).when(Joi.ref("$isValid"), {
    is: Joi.equal(true),
    then: Joi.object({
      body: Joi.object({
        ...entity,
      }),
    }),
    otherwise: Joi.object({
      body: Joi.object({
        ...put,
      }),
    }),
  }),
});

Verify the reference given by you is right Joi.ref("$isValid").
If you provide right reference, this schema will work as you expect.

Answered By – Saurabh Rahate

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