Angular2 - 允许提供者和类型的NgModule唯一实例的无效提供者

我得到了这个追踪，我无法复制此错误。Angular2 - 允许提供者和类型的NgModule唯一实例的无效提供者

vendor.bundle.js:25942 
Uncaught Error: Invalid provider for the NgModule 'NbSharedModule' 
- only instances of Provider and Type are allowed, 
got: [[object Object], MaterialDashboardProService, VehicleTypesService, ?undefined?, ...]

下面是在服务的index.ts文件相同的服务我NbSharedModule

import { NgModule, CUSTOM_ELEMENTS_SCHEMA } from '@angular/core'; 
import { CommonModule } from '@angular/common'; 
import { ReactiveFormsModule, FormsModule } from '@angular/forms'; 
import {MaterialModule} from '@angular/material'; 

import { AdminFormComponent } from './admin-form/admin-form.component'; 
import { 
    MaterialDashboardProService, 
    VehicleTypesService, 
    LocationsService, 
    VehiclesService, 
    BookingsService, 
    NotificationService, 
    UsersService 
} from './services'; 
import { OrganisationFormComponent } from './organisation-form/organisation-form.component'; 
import { 
    MdpActivatorDirective, 
    MdpBootstrapSelectDirective, 
    MdpDatetimePickerDirective, 
    MdpTagsinputDirective 
} from './directives'; 
import { ChunkPipe } from './pipes/chunk.pipe'; 
import { VehicleTypesChooserComponent } from './vehicle-types-chooser/vehicle-types-chooser.component'; 
import { VehicleCardComponent } from './vehicle-card/vehicle-card.component'; 
import { LoaderComponent } from './loader/loader.component'; 
import { NotificationComponent } from './notification/notification.component'; 
import { TagsinputComponent } from './tagsinput/tagsinput.component'; 
import { VehicleFormComponent } from './vehicle-form/vehicle-form.component'; 
import { DeletePopupComponent } from './delete-popup/delete-popup.component'; 

@NgModule({ 
    declarations: [ 
    OrganisationFormComponent, 
    AdminFormComponent, 
    MdpActivatorDirective, 
    MdpDatetimePickerDirective, 
    MdpBootstrapSelectDirective, 
    MdpTagsinputDirective, 
    ChunkPipe, 
    VehicleTypesChooserComponent, 
    VehicleCardComponent, 
    LoaderComponent, 
    NotificationComponent, 
    TagsinputComponent, 
    VehicleFormComponent, 
    DeletePopupComponent 
    ], 
    imports: [ 
    CommonModule, 
    ReactiveFormsModule, 
    FormsModule, 
    MaterialModule.forRoot() 
    ], 
    providers: [ 
    {provide: 'windowObject', useValue: window}, 
    MaterialDashboardProService, 
    VehicleTypesService, 
    LocationsService, 
    VehiclesService, 
    BookingsService, 
    NotificationService, 
    UsersService 
    ], 
    exports: [ 
    OrganisationFormComponent, 
    AdminFormComponent, 
    MdpActivatorDirective, 
    MdpDatetimePickerDirective, 
    MdpBootstrapSelectDirective, 
    MdpTagsinputDirective, 
    ChunkPipe, 
    VehicleTypesChooserComponent, 
    VehicleCardComponent, 
    LoaderComponent, 
    NotificationComponent, 
    TagsinputComponent, 
    VehicleFormComponent, 
    DeletePopupComponent 
    ], 
    schemas: [CUSTOM_ELEMENTS_SCHEMA] 
}) 
export class NbSharedModule { }

package.json

{ 
    "name": "foo-app", 
    "version": "0.0.0", 
    "license": "MIT", 
    "angular-cli": {}, 
    "scripts": { 
    "start": "ng serve", 
    "lint": "tslint \"src/**/*.ts\"", 
    "test": "ng test", 
    "pree2e": "webdriver-manager update", 
    "e2e": "protractor" 
    }, 
    "private": true, 
    "dependencies": { 
    "@angular/common": "2.4.0", 
    "@angular/compiler": "2.4.0", 
    "@angular/core": "2.4.0", 
    "@angular/forms": "2.4.0", 
    "@angular/http": "2.4.0", 
    "@angular/material": "^2.0.0-beta.1", 
    "@angular/platform-browser": "2.4.0", 
    "@angular/platform-browser-dynamic": "2.4.0", 
    "@angular/router": "3.2.3", 
    "@angular2-material/slide-toggle": "^2.0.0-alpha.8-2", 
    "@types/jquery.datatables": "^1.10.34", 
    "angular2-fullcalendar": "^1.1.1", 
    "angular2-moment": "^1.0.0", 
    "core-js": "^2.4.1", 
    "rxjs": "5.0.0-beta.12", 
    "ts-helpers": "^1.1.1", 
    "zone.js": "^0.6.23" 
    }, 
    "devDependencies": { 
    "@angular/compiler-cli": "2.4.0", 
    "@types/jasmine": "2.5.38", 
    "@types/node": "^6.0.42", 
    "angular-cli": "^1.0.0-beta.24", 
    "codelyzer": "~2.0.0-beta.1", 
    "jasmine-core": "2.5.2", 
    "jasmine-spec-reporter": "2.5.0", 
    "karma": "1.2.0", 
    "karma-cli": "^1.0.1", 
    "karma-jasmine": "^1.0.2", 
    "karma-phantomjs-launcher": "^1.0.2", 
    "karma-remap-istanbul": "^0.2.1", 
    "protractor": "4.0.9", 
    "ts-node": "1.2.1", 
    "tslint": "^4.0.2", 
    "typescript": "~2.0.3", 
    "webdriver-manager": "10.2.5" 
    } 
}

来源

2017-02-21 Avinash Raj

出于某种原因'LocationService'是不确定的。看起来你正在使用桶（index.ts）作为服务。有时用通配符重新导出可能导致此问题。有几件事我见过会导致这种情况（通常是使用webpack）。 –

所以最好直接从文件导入服务，而不是index.ts， –

昨天工作正常。今天只有我在除了主人以外的所有分支中都有这个错误。这是节点包的东西吗？我尝试删除节点模块文件夹并重新安装软件包。 –

对于我来说，我已经包含两种导出报表。最后它在删除之后运行。

services/index.ts

export * from './material-dashboard-pro.service'; 
export * from './vehicle-types.service'; 
export * from './locations.service'; 
export * from './vehicles.service'; 
export * from './locations.service'; // duplicated, remove this

来源

2017-02-21 11:55:36

Angular2 - 允许提供者和类型的NgModule唯一实例的无效提供者

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