Question

我通过Visual Studio模板构建了一个Angular应用程序。

给出了以下结构：

/ Clientapp
./应用程序/ app.module.shared.ts
./应用程序/ app.module.client.ts
./应用程序/ app.module.server.ts
./部件/ *
./服务/人-data.service.ts
./services/auth-http://service.ts
./引导client.ts
./引导server.ts

所以在person-data.service.ts中我想使用auth-http.service.ts。

人-data.service.ts

import { Person } from '../models/person'
import { Configuration } from '../constants/global.constants';
import { Injectable, Inject } from '@angular/core';
import { Http, Response, Headers } from '@angular/http';
import 'rxjs/add/operator/map';
import { Observable } from 'rxjs/Observable';
import { AuthHttpService } from '../services/auth-http.service';

@Injectable()
export class PersonService {
    constructor(private http: Http, @Inject(AuthHttpService)private authHttp: AuthHttpService) {

        this.actionUrl = Configuration.API_SERVER + 'api/person/';

        this.headers = new Headers();
        this.headers.append('Content-Type', 'application/json');
        this.headers.append('Accept', 'application/json');
    }

    public GetAll = (): Observable<Person[]> => {
        return this.authHttp.get(this.actionUrl).map((response: Response) => <Person[]>response.json());
    }
}

AUTH-http.service.ts

import { Injectable, Inject } from '@angular/core';
import { Http, Response, RequestOptions } from '@angular/http';
import { Observable } from 'rxjs/Observable';
import 'rxjs/add/operator/map';
import 'rxjs/add/operator/catch';
import { AuthService } from './auth.service';

@Injectable()
export class AuthHttpService {
    constructor(private http: Http, @Inject(AuthService) private authService: AuthService) {

    }
    get(url: string, options?: RequestOptions): Observable<Response> {
        console.log("AuthHttpService Get:" + url);
        if (options) {
            options = this.authService._setRequestOptions(options);
        } else {
            options = this.authService._setRequestOptions();
        }
        return this.http.get(url, options);
    }
}

app.module.shared.ts

import { NgModule } from '@angular/core';
import { RouterModule } from '@angular/router';
import { PersonService } from './services/person-data.service'
import { Configuration } from './constants/global.constants'
import { AuthService } from './services/auth.service'
import { AuthHttpService } from './services/auth-http.service'
import { AppComponent } from './components/app/app.component'

export const sharedConfig: NgModule = {
    bootstrap: [AppComponent],
    declarations: [
        AppComponent
    ],
    providers: [
        AuthHttpService,
        Configuration,
        PersonService,
        AuthService
    ],
    imports: [
        RouterModule.forRoot([
            { path: '', redirectTo: 'home', pathMatch: 'full' },
            { path: '**', redirectTo: 'home' }
        ])
    ]
};

app.module.client.ts

import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { FormsModule } from '@angular/forms';
import { HttpModule } from '@angular/http';
import { BrowserAnimationsModule } from '@angular/platform-browser/animations';
import { sharedConfig } from './app.module.shared';


@NgModule({
    bootstrap: sharedConfig.bootstrap,
    declarations: sharedConfig.declarations,
    imports: [
        BrowserModule,
        FormsModule,
        HttpModule,
        BrowserAnimationsModule,
        ...sharedConfig.imports
    ],
    providers: [
        { provide: 'ORIGIN_URL', useValue: location.origin }
    ]
})
export class AppModule {
}

当我运行应用程序时，我收到以下错误。

处理请求时发生未处理的异常。例外：调用节点模块失败，错误：错误：没有提供者 for AuthHttpService！

我错过了什么？

Answer 1

尝试从构造函数中删除inject装饰器，因为它们不需要。

然后，正如错误所示，然后导入模块的提供程序内部，例如：

providers: [
             AuthHttpService,
             // Other services here,
             { provide: 'ORIGIN_URL', useValue: location.origin }
            ]

Answer 2

我想你忘记了

在sharedConfig.providers

中导入app.module.client.ts

<强> app.module.client.ts

...
providers: [
        ...sharedConfig.providers,
        { provide: 'ORIGIN_URL', useValue: location.origin }
    ]
...

注入服务到服务

2 个答案: