Example of automatic translation of a JSON property in a TypeORM model.

typeorm_model.ts

import { PrimaryGeneratedColumn, Entity, Column } from 'typeorm';

@Entity('foo')
export class Foo {
  @PrimaryGeneratedColumn()
  public id: number;

  @Column({ default: '' })
  public get link(): string {
    let value = this._link;

    if (typeof value === 'string' && value.length > 0) {
      value = JSON.parse(value);
    }

    return value;
  }
  
  public set link(link: string) {
    this._link = JSON.stringify(link);
  }

  private _link: string;
}