TypeORM joined tables

user.entity.ts

import { BaseEntity, Column, Entity, OneToMany, PrimaryColumn } from 'typeorm';
import { UseAsTitle } from 'admin-bro-typeorm';
import { Post } from '../../posts/entities/post.entity';

@Entity('users')
export class User extends BaseEntity {

  @PrimaryColumn({
    name: 'pk_user',
    generated: 'increment',
  })
  pkUser: number;

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

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

  @Column()
  link: string;

  @OneToMany(_type => Post, post => post.user)
  posts: Post[];

  @UseAsTitle()
  fullName(): string {
    return `${this.firstName} ${this.lastName}`;
  }

}