ValidationPipe setup in NestJS - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to import the ValidationPipe from NestJS.

NestJS

import { [1] } from '@nestjs/common';

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

APipeTransform

BValidationPipe

CController

DInjectable

Attempts:

3 left

💡 Hint

Common Mistakes

Importing unrelated classes like Controller or Injectable.

Confusing ValidationPipe with PipeTransform interface.

The ValidationPipe is imported from @nestjs/common to enable validation features.

2fill in blank

medium

Complete the code to apply ValidationPipe globally in the main.ts file.

NestJS

app.useGlobalPipes(new [1]());

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

AValidationPipe

BLogger

CAuthGuard

DParseIntPipe

Attempts:

3 left

💡 Hint

Common Mistakes

Using pipes unrelated to validation like ParseIntPipe.

Forgetting to instantiate the pipe with new.

Using ValidationPipe globally ensures all incoming requests are validated automatically.

3fill in blank

hard

Fix the error in the ValidationPipe options to enable automatic transformation.

NestJS

app.useGlobalPipes(new ValidationPipe({ transform: [1] }));

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

Afalse

B'true'

Ctrue

DTrue

Attempts:

3 left

💡 Hint

Common Mistakes

Using string 'true' instead of boolean true.

Using capitalized True which is invalid in JavaScript/TypeScript.

The transform option must be a boolean true (without quotes) to enable automatic type conversion.

4fill in blank

hard

Fill both blanks to configure ValidationPipe to whitelist and forbid non-whitelisted properties.

NestJS

app.useGlobalPipes(new ValidationPipe({ whitelist: [1], forbidNonWhitelisted: [2] }));

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

Atrue

Bfalse

Cundefined

Dnull

Attempts:

3 left

💡 Hint

Common Mistakes

Setting these options to false disables the security benefits.

Using undefined or null instead of boolean values.

Setting whitelist and forbidNonWhitelisted to true ensures only allowed properties are accepted and others cause errors.

5fill in blank

hard

Fill all three blanks to create a ValidationPipe with transform, whitelist, and forbidNonWhitelisted enabled.

NestJS

app.useGlobalPipes(new ValidationPipe({ transform: [1], whitelist: [2], forbidNonWhitelisted: [3] }));

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

Afalse

Btrue

Cundefined

Dnull

Attempts:

3 left

💡 Hint

Common Mistakes

Leaving any option false disables part of validation.

Using undefined or null instead of boolean true.

Enabling transform, whitelist, and forbidNonWhitelisted all to true activates full validation and transformation features.