Typeorm - Converting SQL Left Join one to one relation into typeorm query builder - sql

Question

I have following entities in a postgresql database using Typeorm:
#Entity('issuer')
export class Issuer {
#PrimaryColumn()
issuer_id: string
#OneToOne(() => UserData, { cascade: true })
#JoinColumn({ name: 'issuer_id', referencedColumnName: 'public_address' })
u_data: UserData
#BeforeInsert()
newid() {
this.issuer_id = this.u_data.public_address
}
...remaining columns...
}
#Entity('user_data')
export class UserData {
#PrimaryColumn({ type: 'varchar', unique: true })
email: string
#Column({ type: 'varchar', nullable: false, unique: true })
public_address: string
...remaining columns...
}
Above in the Issuer entity, I am doing a small trick to be able to make a key both primary and foreign, issuer_id column, which is primary key of Issuer and foreign key of UserData which refers to public_address column of UserData. I wanna join both entities, and I am able to do it with the following query:
SELECT *
FROM user_data
LEFT OUTER JOIN issuer ON issuer.issuer_id = user_data.public_address
WHERE user_data.email = $1
I am unable to convert this simple SQL code into Typeorm query builder. Here is my failed attempt:
await this.userRepository
.createQueryBuilder('user')
.leftJoin('user.public_address', 'issuer')
.where('user.email = :email', { email })
.getOne()
Here is the error I am getting:
TypeORMError: Relation with property path public_address in entity was not found.

Answer 1

It seems when trying to left join (right join doesn't exist on typeorm) from an entity that has no direct relation to its relative, leftJoinAndSelect function should be used with a condition:
return await this.userRepo
.createQueryBuilder('user')
.leftJoinAndSelect(Issuer, 'issuer', 'user.public_address = issuer.issuer_id')
.where('user.email = :email', { email })
.getRawOne()