How to make in TypeORM, OneToOne relationship without changing the structure of the database?

Question

Database

Good afternoon! There is a DB (the rights only to reading). I describe essences of 2 tables.
1 -User.entity.ts
List of users

import { Entity, PrimaryColumn, Column, Timestamp, OneToOne, JoinColumn } from 'typeorm';
import ModelHasRoles from './modelHasRoles.entity';

@Entity({
    name: 'user'
})
export default class User {
    @PrimaryColumn({
        type: 'integer'
    })
    id: number;

    @OneToOne(() => ModelHasRoles, role => role.modelId)
    role: ModelHasRoles
    ....
}

2- ModelHasRoles.entity.ts
There is written a role for each user

import { Entity, PrimaryColumn, Column, OneToOne, JoinColumn } from 'typeorm';
import User from './user.entity';

@Entity({
    name: 'model_has_roles'
})
export default class ModelHasRoles {
    @PrimaryColumn({
        name: 'role_id',
        type: 'integer'
    })
    roleId: number;

    @OneToOne(() => User, user => user.id)
    user: User;

    @Column({
        name: 'model_type',
        type: 'varchar',
        length: 255
    })
    modelType: string;

    @Column({
        name: 'model_id',
        type: 'bigint'
    })
    modelId: number;
}

User.id == ModelHasRole.modelId

I can’t build a relationship so that when you get rows from the User table, fields from ModelHasRole are pulled up.