如何在不获取循环依赖的情况下使用loopback4实现链式模型

import {Entity, model, property} from '@loopback/repository';

@model()
export class YourModel extends Entity {
  @property({
    type: () => YourModel,
  })
  next?: YourModel;
}

import {repository} from '@loopback/repository';
import {YourModelRepository} from '../repositories';
import {get, param} from '@loopback/rest';

export class YourController {
  constructor(
    @repository(YourModelRepository)
    public yourModelRepository: YourModelRepository,
  ) {}

  @get('/your-models/{id}')
  async findById(@param.path.number('id') id: number): Promise<YourModel> {
    return this.yourModelRepository.findById(id);
  }
}

import {YourController} from './controllers';
import {YourModel} from './models';

export class YourApplication extends BootMixin(
  ServiceMixin(RepositoryMixin(RestApplication)),
) {
  constructor(options: ApplicationConfig = {}) {
    super(options);

    // 注册控制器
    this.controller(YourController);

    // 注册模型
    this.model(YourModel);

    // ...
  }
}

import {YourController} from './controllers';

export class YourApplication extends BootMixin(
  ServiceMixin(RepositoryMixin(RestApplication)),
) {
  constructor(options: ApplicationConfig = {}) {
    super(options);

    // 注册控制器
    const yourController = this.controller(YourController);

    // 配置路由
    this.route('get', '/your-models/{id}', yourController.findById.bind(yourController));

    // ...
  }
}