ConfigModule setup in NestJS - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to import ConfigModule globally in a NestJS module.

NestJS

import { Module } from '@nestjs/common';
import { ConfigModule } from '@nestjs/config';

@Module({
  imports: [ConfigModule.[1]({ isGlobal: true })],
})
export class AppModule {}

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

AforRoot

Bregister

Ccreate

Dinitialize

Attempts:

3 left

💡 Hint

Common Mistakes

Using a method name that does not exist on ConfigModule.

Forgetting to set isGlobal to true for global availability.

The ConfigModule.forRoot() method is used to set up the configuration module globally in NestJS.

2fill in blank

medium

Complete the code to load a custom configuration file using ConfigModule.

NestJS

import { Module } from '@nestjs/common';
import { ConfigModule } from '@nestjs/config';
import customConfig from './custom.config';

@Module({
  imports: [ConfigModule.forRoot({ [1]: [customConfig] })],
})
export class AppModule {}

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

AconfigFiles

Bfiles

Cimports

Dload

Attempts:

3 left

💡 Hint

Common Mistakes

Using incorrect option names like 'files' or 'imports'.

Passing the configuration file directly without wrapping in an array.

The load option allows you to provide custom configuration files or functions to the ConfigModule.

3fill in blank

hard

Fix the error in the code to correctly inject ConfigService in a service constructor.

NestJS

import { Injectable } from '@nestjs/common';
import { ConfigService } from '@nestjs/config';

@Injectable()
export class MyService {
  constructor(private readonly [1]: ConfigService) {}
}

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

AconfigService

Bservice

CConfigService

Dconfig

Attempts:

3 left

💡 Hint

Common Mistakes

Using the class name as the parameter name.

Using generic or unclear parameter names.

The parameter name in the constructor should be camelCase, typically configService, to follow NestJS conventions and avoid confusion.

4fill in blank

hard

Fill both blanks to create a configuration object with environment variables and default values.

NestJS

export default () => ({
  port: parseInt(process.env.[1] || '[2]', 10),
});

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

APORT

B3000

CNODE_PORT

D8080

Attempts:

3 left

💡 Hint

Common Mistakes

Using incorrect environment variable names.

Not providing a string default value.

The environment variable PORT is commonly used for the server port, and 3000 is a typical default port number.

5fill in blank

hard

Fill all three blanks to access a nested configuration value safely using ConfigService.

NestJS

const dbHost = this.configService.get<string>('database.[1].[2]', [3]);

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

Aconnection

Bhost

C'localhost'

Dport

Attempts:

3 left

💡 Hint

Common Mistakes

Using incorrect nested keys.

Using an options object instead of a positional default value.

The nested keys connection and host access the database host, and 'localhost' provides a fallback if the key is missing.