[Solved] Identify the error in this NestJS repository injection code snippet: @Injectable() export class ProductService { constructor(private productRepository: Repository) {} } | NestJS

NestJS - Database with TypeORM

Identify the error in this NestJS repository injection code snippet:

@Injectable()
export class ProductService {
  constructor(private productRepository: Repository) {}
}

AMissing @InjectRepository decorator for productRepository

BRepository should be injected using @InjectableRepository

CConstructor should not have parameters

DRepository cannot be injected in services

Step-by-Step Solution

Solution:

Step 1: Check how repositories are injected in NestJS
Repositories must be injected with @InjectRepository(Entity) decorator to work properly.
Step 2: Identify missing decorator in the code
The code misses @InjectRepository(Product) before the repository parameter.
Final Answer:
Missing @InjectRepository decorator for productRepository -> Option A
Quick Check:
Repository injection needs @InjectRepository [OK]

Quick Trick: Always use @InjectRepository for repositories in constructor [OK]

Common Mistakes:

Master "Database with TypeORM" in NestJS

9 interactive learning modes - each teaches the same concept differently

More NestJS Quizzes

Identify the error in this NestJS repository injection code snippet: