Example Model with Relations and DTO

[pietrzakadrian]

I am trying to create a model with a relation with DTO and call the list of users with these relations.

Model User:

...
@Column()
    firstName: string;

@OneToOne(
        type => UserSalaryEntity,
        userSalary => userSalary.user,
        {
            nullable: false,
        },
    )
    userSalary: UserSalaryEntity;
...

User DTO:

export class UserDto extends AbstractDto {
    @ApiProperty()
    firstName: string;

    @ApiProperty({ type: UserSalaryDto })
    userSalary: UserSalaryDto;

    constructor(
        user: UserEntity,
        userSalary: UserSalaryDto,
    ) {
        super(user);
        this.firstName = user.firstName;
        this.userSalary = relations.userSalary;
    }
}

Model UserSalary:

...
@Column('decimal', { precision: 13, scale: 2, default: 0 })
    salary: number;

@OneToOne(
        type => UserEntity,
        user => user.userSalary,
        { nullable: false },
    )
    @JoinColumn({ name: 'user_id' })
    user: UserEntity;
...

UserSalary DTO:

export class UserSalaryDto extends AbstractDto {
    @ApiProperty()
    salary: number;

    @ApiProperty()
    userId: number;

    constructor(userSalary: UserSalaryEntity, user: UserDto) {
        super(userSalary);
        this.salary = userSalary.salary;
        this.userId = user.id;
    }
}

I'm not sure if my dto looks good, that's what I thought.
But now I'm trying to do endpoint GET /users:

async getUsers(
        pageOptionsDto: UsersPageOptionsDto,
    ): Promise<UsersPageDto> {
        const queryBuilder = this.userRepository.createQueryBuilder('user');
        const [users, usersCount] = await queryBuilder
            .leftJoinAndSelect('user.userSalary', 'userSalary')
            .skip(pageOptionsDto.skip)
            .take(pageOptionsDto.take)
            .getManyAndCount();

        const pageMetaDto = new PageMetaDto({
            pageOptionsDto,
            itemCount: usersCount,
        });

        return new UsersPageDto(users.toDtos(), pageMetaDto);
    }

there is a problem with dto.
Could you create an example entity for me according to this boilerplate with relations?