1const Joi = require('@hapi/joi');
2
3const joiSchema = Joi.object({
4  a: Joi.string()
5    .min(2)
6    .max(10)
7    .required()
8    .messages({
9      'string.base': `"a" should be a type of 'text'`,
10      'string.empty': `"a" cannot be an empty field`,
11      'string.min': `"a" should have a minimum length of {#limit}`,
12      'any.required': `"a" is a required field`
13    })
14});
15
16const validationResult = joiSchema.validate({ a: 2 }, { abortEarly: false });
17console.log(validationResult.error); // expecting ValidationError: "a" should be a type of 'text'

1const Joi = require('joi');
2
3const schema = Joi.object({
4    username: Joi.string()
5        .alphanum()
6        .min(3)
7        .max(30)
8        .required(),
9
10    password: Joi.string()
11        .pattern(new RegExp('^[a-zA-Z0-9]{3,30}$')),
12
13    repeat_password: Joi.ref('password'),
14
15    access_token: [
16        Joi.string(),
17        Joi.number()
18    ],
19
20    birth_year: Joi.number()
21        .integer()
22        .min(1900)
23        .max(2013),
24
25    email: Joi.string()
26        .email({ minDomainSegments: 2, tlds: { allow: ['com', 'net'] } })
27})
28    .with('username', 'birth_year')
29    .xor('password', 'access_token')
30    .with('password', 'repeat_password');
31
32
33schema.validate({ username: 'abc', birth_year: 1994 });
34// -> { value: { username: 'abc', birth_year: 1994 } }
35
36schema.validate({});
37// -> { value: {}, error: '"username" is required' }
38
39// Also -
40
41try {
42    const value = await schema.validateAsync({ username: 'abc', birth_year: 1994 });
43}
44catch (err) { }

1Joi.object().keys({
2    contact: Joi.object().keys({
3        first_name: Joi.string(),
4        last_name: Joi.string(),
5        phone: Joi.string(),
6    }),
7    address: Joi.object().keys({
8        place: Joi.string(),
9        city: Joi.string().min(2).max(30),
10        street: Joi.string(),
11        house_number: Joi.string()
12    }).when('contact', {
13        is: Joi.object().keys({
14            first_name: Joi.exist(),
15            last_name: Joi.exist(),
16            phone: Joi.exist(),
17        }),
18        then: Joi.object({ place: Joi.required() }).required(),
19        otherwise: Joi.object({ place: Joi.forbidden() })
20    }),
21    passengers_amount: Joi.number(),
22    notes: Joi.string()
23});
24

1const joi = require("joi");
2
3const validation = joi.object({
4     userName: joi.string().alphanum().min(3).max(25).trim(true).required(),
5     email: joi.string().email().trim(true).required(),
6     password: joi.string().min(8).trim(true).required(),
7     mobileNumber: joi.string().length(10).pattern(/[6-9]{1}[0-9]{9}/).required(),
8     birthYear: joi.number().integer().min(1920).max(2000),
9     skillSet: joi.array().items(joi.string().alphanum().trim(true)).default([]),
10     is_active: joi.boolean().default(true),
11});
12

1function responseValidate(response) {
2  const schema = {
3    id: Joi.objectId().required(),
4    response: Joi.string().min(3).max(512).required()
5  };
6
7  return schema.validate(response);
8}
9