express-validator setup - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to import the express-validator check function.

Express

const { [1] } = require('express-validator');

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

Averify

Bvalidate

Ccheck

Dassert

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'validate' or 'verify' which are not exported by express-validator.

Forgetting to destructure the function from the package.

The check function is imported from express-validator to define validation rules.

2fill in blank

medium

Complete the code to create a validation chain for the 'email' field.

Express

app.post('/signup', [ [1]('email').isEmail() ], (req, res) => { res.send('Done'); });

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

Acheck

Bassert

Cverify

Dvalidate

Attempts:

3 left

💡 Hint

Common Mistakes

Using functions not provided by express-validator like 'validate' or 'assert'.

Not passing the field name as a string.

The check function creates a validation chain for the 'email' field.

3fill in blank

hard

Fix the error in the code to get validation results from the request.

Express

const errors = [1](req);

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AvalidationResult

Bcheck

Cvalidate

Dassert

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'check' or 'validate' which do not extract errors.

Not calling the function with the request object.

The validationResult function extracts validation errors from the request object.

4fill in blank

hard

Fill both blanks to import and use the validationResult function.

Express

const { [1] } = require('express-validator');

const errors = [2](req);

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

AvalidationResult

Bcheck

Dassert

Attempts:

3 left

💡 Hint

Common Mistakes

Importing 'check' instead of 'validationResult' for error extraction.

Calling a wrong function on the request object.

You import validationResult and then call it with the request to get errors.

5fill in blank

hard

Fill all three blanks to create a validation chain for 'password' with minimum length and check errors.

Express

const { [1], [2] } = require('express-validator');

app.post('/login', [
  [1]('password').isLength({ min: 6 })
], (req, res) => {
  const errors = [2](req);
  if (!errors.isEmpty()) {
    return res.status(400).json({ errors: errors.array() });
  }
  res.send('Success');
});

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

Acheck

BvalidationResult

Dassert

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up the functions for validation and error extraction.

Not calling the validationResult function with the request.

You import both check and validationResult. Use check to validate the password and validationResult to get errors.