Joining Same Column with more than one table

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)

Steps to reproduce or a small repository showing the problem:

I have got three entities, Contact, EnhancedContact and MappedContact, with a one to one relation between them. The entities are shown below:

@Entity()
export class Contact {

    @PrimaryGeneratedColumn()
    id: number;

    @Column({ name: 'first_name', type: 'text' })
    firstName: string;

    @Column({ name: 'last_name', type: 'text' })
    lastName: string;

    @Column({ name: 'email', type: 'text' })
    email: string;

}

@Entity()
export class MappedContact{
    @PrimaryColumn({type: 'int', name: 'id_contact'})
    contactId: number;

    @OneToOne(type => Contact)
    @JoinColumn({name: 'id_contact'})
    contact: Contact;

    @OneToOne(type => EnhancedContact)
    @JoinColumn({name: 'id_contact'})
    enhancedContact: EnhancedContact;
}


@Entity()
export class EnhancedContact{
    @PrimaryColumn({type: 'int', name: 'id_contact'})
    contactId: number;

    @OneToOne(() => Contact)
    @JoinColumn({name: 'id_contact'})
    contact: Contact;

    @Column({name: 'power', type: 'int'})
    power: number;
}

I want to left join and select contact from mapped contact. For this, I employ the following command:

const mcs = await connection.manager.createQueryBuilder(MappedContact, "entity")
    .leftJoinAndSelect("entity.contact", "contact")
    .getMany();
console.log(mcs);

I get a failed Query error:

SELECT "entity"."id_contact" AS "entity_id_contact", "contact"."id" AS "contact_id", "contact"."first_name" AS "contact_first_name", "contact"."last_name" AS "contact_last_name", "contact"."email" AS "contact_email" FROM "mapped_contact" "entit
y" LEFT JOIN "contact" "contact" ON contact.contactId="entity"."id_contact"

I don’t know why contact.id became contact.contactId.

I also tried referencedColumnName, It still gave me the same error.

@Entity()
export class Contact {

    @PrimaryGeneratedColumn()
    id: number;

    @Column({ name: 'first_name', type: 'text' })
    firstName: string;

    @Column({ name: 'last_name', type: 'text' })
    lastName: string;

    @Column({ name: 'email', type: 'text' })
    email: string;

}

@Entity()
export class MappedContact{
    @PrimaryColumn({type: 'int', name: 'id_contact'})
    contactId: number;

    @OneToOne(type => Contact)
    @JoinColumn({name: 'id_contact', referencedColumnName: 'id'})
    contact: Contact;

    @OneToOne(type => EnhancedContact)
    @JoinColumn({name: 'id_contact', referencedColumnName: 'contactId'})
    enhancedContact: EnhancedContact;
}


@Entity()
export class EnhancedContact{
    @PrimaryColumn({type: 'int', name: 'id_contact'})
    contactId: number;

    @OneToOne(() => Contact)
    @JoinColumn({name: 'id_contact', referencedColumnName: 'id'})
    contact: Contact;

    @Column({name: 'power', type: 'int'})
    power: number;
}

[ramk18]

I found a workaround. I used leftJoinAndMapOne which seems to work.

[Kvikikp]

Are there any updates when this will be fixed?