Create foreign key constraint without relation

Issue type:

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

Database system/driver:

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

TypeORM version:

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

I’m evaluating TypeORM and I’m trying to figure out if there is a way to define a foreign key constraint without having to define the relationship. All I care about is that the database enforces the constraint - I don’t want or need the persistence, loading of relations, or the superfluous properties on my classes. For example:

// A user can have multiple phone numbers
@Entity()
class PhoneNumber {
    @PrimaryGeneratedColumn(); 
    id: number; 
    
    @Column()
    @ForeignKey((u: User) => u.id)
    userId: string;

    @Column(); 
    phoneNumber: string; 
}

This would create a foreign key constraint, and nothing else. Is this possible somehow? I found a couple other posts requesting the same thing, but I’m not sure if it’s possible. https://github.com/typeorm/typeorm/issues/188 https://stackoverflow.com/questions/55170906/typeorm-how-to-set-foreignkey-explicitly-without-having-property-for-loading-re

Thanks in advance.

[jb4e]

Thanks, @diegoazh, but I don’t think that addresses what I’m looking for. I’d like to be able to specify only profileId on the model, and not have a profile property. Something like this:

    @Column({ nullable: true })
    @ForeignKey(() => Profile)
    profileId: number;

[DaichiShirakawa]

Sharing my temporary solution for this issue:

@Entity("parents")
export class Parent {
  @PrimaryGeneratedColumn("uuid")
  id: string;

  // ⭐No relationship descriptions for Parent
}

@Entity("children")
export class Child extends {
  @PrimaryGeneratedColumn("uuid")
  id: string;
  @Column()
  parentId: string;

  // ⭐Only relation definitions in Child. It works!
  @ManyToOne(() => Parent)
  @JoinColumn({ name: "parentId" })
  _tenantRelation: Tenant; // ⭐Using underscored property, because I don't need it.
}