Migrations in NestJS - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to import the migrations module in NestJS.

NestJS

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

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ATypeOrmModule

BMigrationService

CMigrationsModule

DMigrationModule

Attempts:

3 left

💡 Hint

Common Mistakes

Using a non-existent module like MigrationService.

Confusing MigrationModule with TypeOrmModule.

The TypeOrmModule is imported to use migrations with NestJS and TypeORM.

2fill in blank

medium

Complete the code to configure migrations in the TypeOrmModule.

NestJS

TypeOrmModule.forRoot({
  migrations: ["[1]"],
  migrationsRun: true,
});

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Amigrations/*.js

Bmigrations/*.ts

CMigrationFiles

DMigrationScripts

Attempts:

3 left

💡 Hint

Common Mistakes

Using TypeScript files path instead of JavaScript.

Using undefined variables like MigrationFiles.

The migrations array expects the path to compiled JavaScript migration files, usually migrations/*.js.

3fill in blank

hard

Fix the error in the migration class name to follow NestJS migration conventions.

NestJS

export class [1] implements MigrationInterface {
  async up(queryRunner: QueryRunner): Promise<void> {
    // migration code
  }
  async down(queryRunner: QueryRunner): Promise<void> {
    // revert code
  }
}

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Acreateusertable

BcreateUserTable

Ccreate_user_table

DCreateUserTable

Attempts:

3 left

💡 Hint

Common Mistakes

Using camelCase or snake_case for class names.

Starting class names with lowercase letters.

Migration class names should be PascalCase starting with a capital letter, like CreateUserTable.

4fill in blank

hard

Fill both blanks to correctly run migrations using the CLI command.

NestJS

npm run [1] -- [2]

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Atypeorm

Bmigration:run

Cstart

Dbuild

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'start' or 'build' instead of 'migration:run'.

Using wrong npm script names.

The command npm run typeorm -- migration:run runs the migrations using the TypeORM CLI.

5fill in blank

hard

Fill all three blanks to create a migration file with the correct CLI command and naming.

NestJS

npm run [1] -- [2] [3]

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Atypeorm

Bmigration:create

CAddProductsTable

Dstart

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'start' instead of 'typeorm' for the npm script.

Using 'migration:run' instead of 'migration:create'.

Using lowercase or snake_case for migration names.

The command npm run typeorm -- migration:create AddProductsTable creates a new migration file named AddProductsTable.