我在将依赖项注入拦截器时遇到问题。我想将 TranslateService 注入 HttpErrorInterceptor,但出现循环依赖错误。当我删除 TranslateService 注入时,一切正常。
我已经在我的 app.module.ts 中声明了拦截器。
我的应用程序模块如下所示:
@NgModule({
declarations: [
AppComponent
],
imports: [
BrowserModule,
BrowserAnimationsModule,
CoreModule,
HttpClientModule,
TranslateModule.forRoot({
loader: {
provide: TranslateLoader,
useFactory: HttpLoaderFactory,
deps: [HttpClient],
},
defaultLanguage: 'pl-pl'
}),
AppRoutingModule,
RouterModule,
FormsModule,
ReactiveFormsModule,
ToastrModule.forRoot()
],
providers: [
{
provide: HTTP_INTERCEPTORS,
useClass: JwtInterceptor,
multi: true
},
{
provide: HTTP_INTERCEPTORS,
useClass: HttpErrorInterceptor,
multi: true,
deps: [TranslateService, ToastrService]
}
],
bootstrap: [AppComponent]
})
export class AppModule { }
在 AppModule 中,我导入了 CoreModule,其中有一个包含拦截器的文件夹,我的 CoreModule 如下所示:
@NgModule({
declarations: [],
imports: [
CommonModule
],
providers: [
CookieService,
NoAuthGuard,
AuthGuard
]
})
export class CoreModule { }
我将登录页面放在AuthModule中,如下所示:
@NgModule({
declarations: [LoginComponent, AuthComponent, ForgotPasswordComponent],
imports: [
CommonModule,
AuthRoutingModule,
RouterModule,
SharedModule
],
providers: [
AuthService
]
})
export class AuthModule { }
在 Authmodule 中,我导入了 SharedModule,其中导出了 TranslateModule。
SharedModule 看起来像这样:
@NgModule({
declarations: [],
imports: [
CommonModule,
HttpClientModule,
ReactiveFormsModule
],
exports: [
TranslateModule,
ReactiveFormsModule
]
})
export class SharedModule { }
我无法找出为什么登录页面上出现循环依赖错误。
我的假设是,我已将 CoreModule 导入到 AppModule 中,在其中保留拦截器、守卫,并且我有 SharedModule,它是对所有功能模块的即兴发挥,我想保留例如那里有通用的组件。
Błąd,jaki dostaję 致:
core.js:6162 ERROR Error: NG0200: Circular dependency in DI detected for InjectionToken HTTP_INTERCEPTORS. Find more at https://angular.io/errors/NG0200
at throwCyclicDependencyError (core.js:216)
at R3Injector.hydrate (core.js:11381)
at R3Injector.get (core.js:11205)
at HttpInterceptingHandler.handle (http.js:1978)
at MergeMapSubscriber.project (http.js:1114)
at MergeMapSubscriber._tryNext (mergeMap.js:44)
at MergeMapSubscriber._next (mergeMap.js:34)
at MergeMapSubscriber.next (Subscriber.js:49)
at Observable._subscribe (subscribeToArray.js:3)
at Observable._trySubscribe (Observable.js:42)