Joi as validation alternative in Express - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to import Joi for validation.

Express

const Joi = require('[1]');

Drag options to blanks, or click blank then click option'

Abody-parser

Bexpress

Cjoi

Dvalidator

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'express' instead of 'joi' to import Joi.

Forgetting to install the 'joi' package before importing.

Joi is imported using the package name 'joi' to use its validation features.

2fill in blank

medium

Complete the code to define a Joi schema for a required string 'username'.

Express

const schema = Joi.object({ username: Joi.[1]().required() });

Drag options to blanks, or click blank then click option'

Astring

Barray

Cboolean

Dnumber

Attempts:

3 left

💡 Hint

Common Mistakes

Using Joi.number() for a text field.

Omitting the required() method for mandatory fields.

Use Joi.string() to specify that 'username' must be a string.

3fill in blank

hard

Fix the error in validating the request body using Joi.

Express

const { error } = schema.[1](req.body);

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AvalidateBody

Bcheck

Ctest

Dvalidate

Attempts:

3 left

💡 Hint

Common Mistakes

Using non-existent methods like 'validateBody' or 'check'.

Not destructuring the 'error' from the validation result.

The correct Joi method to validate data is 'validate'.

4fill in blank

hard

Fill both blanks to create a middleware that validates 'email' as a required string and calls next() if valid.

Express

const validateEmail = (req, res, next) => {
  const schema = Joi.object({ email: Joi.[1]().[2]() });
  const { error } = schema.validate(req.body);
  if (error) return res.status(400).send(error.details[0].message);
  next();
};

Drag options to blanks, or click blank then click option'

Astring

Brequired

Cnumber

Doptional

Attempts:

3 left

💡 Hint

Common Mistakes

Using Joi.number() for email.

Using optional() instead of required() for mandatory fields.

Use Joi.string() to specify the type and required() to make it mandatory.

5fill in blank

hard

Fill all three blanks to define a Joi schema for 'password' with minimum length 8, required, and validate it.

Express

const schema = Joi.object({ password: Joi.[1]().min([2]).[3]() });
const { error } = schema.validate(req.body);

Drag options to blanks, or click blank then click option'

Astring

B8

Crequired

Dnumber

Attempts:

3 left

💡 Hint

Common Mistakes

Using number() instead of string() for password.

Omitting required() making the field optional.

Setting min() to a wrong value or forgetting it.

Password should be a string, have a minimum length of 8, and be required.