repo.save throwing UpdateValuesMissingError: Cannot perform update query because update values are not defined

Issue type:

[ ] question [X] bug report [ ] feature request [ ] documentation issue

Database system/driver:

[ ] cordova [ ] mongodb [ ] mssql [ ] mysql / mariadb [ ] oracle [X] postgres [ ] cockroachdb [ ] sqlite [ ] sqljs [ ] react-native [ ] expo

TypeORM version:

[X] latest [ ] @next [ ] 0.x.x (or put your version here)

Hi friends I am having a weird behavior trying to call save:

Consider the following:

  const repo = getRepository(NewAssignmentNotification)
  const notification = new NewAssignmentNotification()
  const owner = await customer.owner
  notification.recipient = owner
  notification.newCustomerAssignment = customer
  notification.account = await owner.account
  notification.createdAt = now()
  console.log(JSON.stringify(notification, null, 2));
  try{
    await repo.save(notification)
  }catch (e) {
    console.log(e)
  }

With that we get the exception:

UpdateValuesMissingError: Cannot perform update query because update values are not defined. Call "qb.set(...)" method to specify updated values.

The Entity looks like so …

@InterfaceType({ description: `a timely message to display to a user of quala` })
@Entity({ orderBy: { createdAt: 'DESC' }, synchronize: true })
@TableInheritance({ column: { type: 'varchar', name: 'type' } })
export class Notification {
  @Field(() => ID)
  @PrimaryGeneratedColumn('uuid')
  id: string

  @Field()
  @Column({ nullable: false })
  type: string

  @Field(() => User)
  @ManyToOne(() => User, { lazy: true, nullable: false })
  recipient: Lazy<User>

  @Field()
  @CreateDateColumn()
  createdAt: Date

  @Field()
  @Column({ nullable: true })
  dismissedAt: Date
}

and

@ObjectType({ implements: Notification })
@ChildEntity()
export class NewAssignmentNotification extends Notification {
  @Field(() => Customer)
  @ManyToOne(() => Customer, { lazy: true })
  @JoinTable()
  newCustomerAssignment: Lazy<Customer>
}

Might be similar to: https://github.com/typeorm/typeorm/issues/4501