typeorm：如何使用只有一列主键的 manytoone？

Question

考虑以下实体：

@Entity()
export class One {
  @ManyToOne(() => Two, two => two.oneSomeString)
  @PrimaryColumn()
  public readonly someString!: string

  @PrimaryColumn()
  public readonly someNumber!: number
}

@Entity()
export class Two {
  @PrimaryGeneratedColumn()
  id!: number

  @OneToMany(() => One, one => one.someString, { cascade: true })
  @Column()
  public readonly oneSomeString!: string

我希望Two 的每条记录仅通过someString 而不是整个PK 识别One 的多条记录（因此仅通过someString 进行级联删除）。

Answer 1

试试这样的：

@Entity()
export class One {
  @PrimaryColumn()
  public readonly someString!: string

  @PrimaryColumn()
  public readonly someNumber!: number

  @ManyToOne(() => Two, two => two.ones)
  @JoinColumn({ name: 'someString' })
  public readonly two: Two
}

@Entity()
export class Two {
  @PrimaryGeneratedColumn()
  id!: number

  @Column()
  public readonly oneSomeString!: string

  @OneToMany(() => One, one => one.two, { cascade: true })
  public readonly ones: One[]