圆形依赖注入角度2

Question

我一直在努力services互相注入.构造函数和依赖注入中的以下博客循环依赖关系在它所说的地方有点令人困惑

两个对象之一是隐藏另一个对象C.

我在将Service类注入彼此时遇到以下错误

无法解析PayrollService的所有参数:(SiteService,StorageService,SweetAlertService,？)

//abstractmodal.service.ts
@Injectable()
 export abstract class AbstractModel {

   abstract collection = [];

   constructor(private siteService: SiteService, private storageService: StorageService,
                private sweetalertService: SweetAlertService) {}


   setCollectionEmpty() {
      this.collection = [];
    }
}
//account-payable.service.ts
@Injectable()
export class AccountPayableService extends AbstractModel {

   public collection = [];

   constructor(private sS: SiteService,private stS: StorageService, private sws: SweetAlertService,
            private accpPoService: PayablePurchaseOrderService, private attachmentService: AttachmentService,
            private injectorService: InjectorService) { 
         super(sS, stS, sws);
     }
}
//injector.service.ts
@Injectable()
export class InjectorService {
   constructor(private payrollService: PayrollService) {}

   cleanPayrollCollection() {
     this.payrollService.setCollectionEmpty();
   }
}
//payroll.service.ts
@Injectable()
export class PayrollService extends AbstractModel {

   public collection = [];

   constructor(private sS: SiteService,private stS: StorageService, private sws: SweetAlertService,
            private accpService: AccountPayableService) { 
    super(sS, stS, sws);
   }
}

您的意见和回答将受到很多赞赏.

谢谢

Answer 1

您可以通过注入Injector而不是导致循环依赖关系的其中一个服务来解决循环依赖关系

private payrollService:PayrollService;
constructor(/*private payrollService:PayrollService*/ injector:Injector) {
  setTimeout(() => this.payrollService = injector.get(PayrollService));
}