[Solved] Identify the mistake in this NestJS entity relation:class Article { @OneToMany(() => Comment) comments: Comment; } | NestJS

NestJS - Database with TypeORM

Identify the mistake in this NestJS entity relation:

class Article {
  @OneToMany(() => Comment)
  comments: Comment;
}

AThe property 'comments' should be an array, not a single Comment

BThe decorator should be @ManyToOne instead of @OneToMany

CThe relation callback function is missing the inverse side

DThe entity class name 'Article' is invalid

Step-by-Step Solution

Solution:

Step 1: Check property type
@OneToMany defines a one-to-many relation, so the property must be an array.
Step 2: Identify error
The property comments is declared as a single Comment, which is incorrect.
Final Answer:
The property 'comments' should be an array, not a single Comment -> Option A
Quick Check:
@OneToMany requires array property [OK]

Quick Trick: @OneToMany properties must be arrays [OK]

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