NestJS NestJS Database Integration & ORMs

Question 1

Which NestJS package provides first-class TypeORM integration?

Accepted Answer

@nestjs/typeorm

Answer

@nestjs/database

Answer

@nestjs/orm

Answer

@nestjs/entity

Question 2

What does `TypeOrmModule.forFeature([Entity])` do in a feature module?

Accepted Answer

Registers the entity's repository so it can be injected in that module

Answer

Creates the database table for the entity

Answer

Runs migrations for the specified entity

Answer

Exports the entity to other modules

Question 3

How do you inject a TypeORM repository into a NestJS service?

Accepted Answer

@InjectRepository(User) private repo: Repository<User>

Answer

@Inject(Repository) private repo: Repository

Answer

@Repository(User) private repo

Answer

@TypeOrm(User) private repo: Repository<User>

Question 4

Which TypeORM method should be used to run database transactions in a NestJS service?

Accepted Answer

dataSource.transaction() or EntityManager in a transaction callback

Answer

repository.transaction()

Answer

typeOrmService.beginTransaction()

Answer

@Transactional() decorator

Question 5

What is the purpose of TypeORM migrations in a NestJS production application?

Accepted Answer

To safely evolve the database schema in a controlled, versioned manner

Answer

To seed the database with test data

Answer

To synchronize entity definitions automatically on startup

Answer

To back up the database before schema changes

Question 6

Which NestJS-compatible ORM uses a code-first approach with a schema builder instead of decorators?

Accepted Answer

Prisma

Answer

TypeORM

Answer

Sequelize

Answer

MikroORM