如何在TypeORM中保存双向多对多关系

// EntityA.ts
import { Entity, PrimaryGeneratedColumn, Column, ManyToMany, JoinTable } from "typeorm";
import { EntityB } from "./EntityB";

@Entity()
export class EntityA {
  @PrimaryGeneratedColumn()
  id: number;

  @Column()
  name: string;

  @ManyToMany(type => EntityB, entityB => entityB.entityAs)
  @JoinTable()
  entityBs: EntityB[];
}

// EntityB.ts
import { Entity, PrimaryGeneratedColumn, Column, ManyToMany, JoinTable } from "typeorm";
import { EntityA } from "./EntityA";

@Entity()
export class EntityB {
  @PrimaryGeneratedColumn()
  id: number;

  @Column()
  name: string;

  @ManyToMany(type => EntityA, entityA => entityA.entityBs)
  @JoinTable({ name: "entityA_entityB" })
  entityAs: EntityA[];
}

// 保存关系
const entityA = new EntityA();
entityA.name = "EntityA";

const entityB = new EntityB();
entityB.name = "EntityB";

entityA.entityBs = [entityB];
entityB.entityAs = [entityA];

await connection.manager.save(entityA);