RenaiApp/src/main/entities/library/site.ts

import { Entity, OneToMany } from 'typeorm';
import { MultiNamed } from './base/multi-named';
import { Source } from './source';

@Entity()
export class Site extends MultiNamed {
  @OneToMany(
    () => Source,
    (source: Source) => source.site,
    {
      nullable: false,
      onDelete: 'CASCADE',
      onUpdate: 'CASCADE',
    }
  )
  public sources: Promise<Source[]>;
}