一对多关系不会插入父项

Question

我有一对多的关系。当我选择时，select可以正常工作，但是在尝试进行插入时，插入发生在主表中，而在其他表中发生了更新。

在控制台中生成的日志

[0] query: BEGIN TRANSACTION

[0] query: INSERT INTO "tblCategory"("ID_CATEGORY", "NM_CATEGORY") VALUES (@0, @1)
-- PARAMETERS: [{"value":"BDA9A127-0851-4E2D-8FC7-52FBF27CFDF4","type":"uniqueidentifier","params":[]},{"value":Test,"type":"nvarchar","params":[]}]

[0] query: UPDATE "tblBook" SET "ID_CATEGORY" = @1 WHERE "ID_BOOK" = @0
-- PARAMETERS: ["F5465876-8003-44A6-BF97-9CBBE6D30C92",{"value":"BDA9A127-0851-4E2D-8FC7-52FBF27CFDF4","type":"uniqueidentifier","params":[]}]

[0] query: COMMIT

期望

对于表tblCategory正确生成插入，我需要表tblBook生成插入，而不是正在发生的更新。

Code

author.entity.ts

@Entity('tblCategory')
export class Category {
  @PrimaryColumn({ name: 'ID_CATEGORY', type: 'uniqueidentifier' })
  id: string;

  @Column({ name: 'NM_CATEGORY', type: 'nvarchar' })
  name: string;

  @OneToMany(type => Book, book => book.category)
  @JoinTable({
    name: 'tblBook',
    joinColumn: { name: 'ID_BOOK' },
    inverseJoinColumn: { name: 'ID_CATEGORY' },
  })
  books: Book[];

}

category.service.ts

@Injectable()
export class ForragemPastoService {
  constructor(
    @InjectRepository(Category)
    private readonly repository: Repository<Category>,
  ) {}

  async save(category: Category): Promise<Category> {
    await this.repository.save(category);
    const data = await this.repository.findOne(category.id, {
      relations: ['books'],
    });
    return data;
  }
}

book.entity.ts

@Entity('tblBook')
export class Book {
  @PrimaryColumn({ name: 'ID_BOOK', type: 'uniqueidentifier' })
  id: string;

  @Column({ name: 'DS_TITLE', type: 'nvarchar' })
  title: string;

  @Column({ name: 'DS_SUBTITILE', type: 'nvarchar' })
  subtitle: string;

  @ManyToOne(() => Category, m => m.books)
  @JoinColumn({ name: 'ID_CATEGORY' })
  category: Category;
}

Answer 1

您是否尝试设置级联？它可能会帮助：

@OneToMany(type => Book, book => book.category, {cascade: true})