Angular 2 错误:无效的提供者 - 只允许提供 Provider 和 Type 的实例，得到:[object Object] [英] Angular 2 Error: Invalid provider - only instances of Provider and Type are allowed, got: [object Object]

问题描述

我正在将 ui-router2 与 angular2-rc-4 集成，但我得到了

<块引用>

错误:无效的提供者 - 只允许提供 Provider 和 Type 的实例，得到:[object Object]

以下是引导代码

<上一页>从ui-router-ng2"导入{trace，UIROUTER_PROVIDERS，UIView，UIRouterConfig，Category，UIROUTER_DIRECTIVES}；从@angular/http"导入 {HTTP_PROVIDERS}；从@angular/core"导入{provide, PLATFORM_DIRECTIVES}；从@angular/common"导入{LocationStrategy、HashLocationStrategy、PathLocationStrategy、PlatformLocation}；从'@angular/platform-b​​rowser'导入{BrowserPlatformLocation}；导入'rxjs/add/operator/toPromise';导入'rxjs/add/operator/map'；从@angular/common"导入 { APP_BASE_HREF }；从@angular/forms"导入 { disableDeprecatedForms, provideForms }；从@angular/core"导入 { enableProdMode }；从 '@angular/platform-b​​rowser-dynamic' 导入 { bootstrap }；从'./app.routes'导入{ InitialStates }；从'./app.component'导入{AppComponent}；从./_bootstrap/router.config"导入{MyUIRouterConfig}；if ('' === 'prod') { enableProdMode();}trace.enable(Category.TRANSITION, Category.VIEWCONFIG);引导程序(UIView，[disableDeprecatedForms(),提供表格()，初始状态，{提供:APP_BASE_HREF，使用价值:''},提供(LocationStrategy，{ useClass:HashLocationStrategy })，提供(LocationStrategy，{ useClass:PathLocationStrategy })，提供(平台位置，{ useClass:BrowserPlatformLocation })，...UIROUTER_PROVIDERS，...HTTP_PROVIDERS，提供(UIRouterConfig，{ useClass:MyUIRouterConfig })，提供(PLATFORM_DIRECTIVES，{useValue:[UIROUTER_DIRECTIVES]，multi:true})]);

以下是我的路由器配置.

从ui-router-ng2"导入{UIRouter}；从../app.routes"导入{InitialStates}；从@angular/core"导入{Injectable, Injector}；@Injectable()导出类 MyUIRouterConfig {构造函数(私有注入器:注入器){}配置(uiRouter:UIRouter){//向 StateRegistry 注册每个状态定义(来自 app.states.ts)InitialStates.forEach(state => uiRouter.stateRegistry.register(state));//定义一个默认行为，当 URL 没有匹配到路由时uiRouter.urlRouterProvider.otherwise(() => uiRouter.stateService.go("app", null, null) && null);}}

解决方案

如果你这样写，一个简单的错字也会引发同样的错误:

{ provider: MyService, useValue: myServiceMock }

而不是这个:

{ 提供:MyService，useValue:myServiceMock }

注意 provider 和 provide 之间的区别.正确的是provide.

希望这会有所帮助.

I am integrating ui-router2 with angular2-rc-4 but i am getting

Error: Invalid provider - only instances of Provider and Type are allowed, got: [object Object]

Following is the bootstraping code

    import {trace, UIROUTER_PROVIDERS, UIView, UIRouterConfig, Category, UIROUTER_DIRECTIVES} from "ui-router-ng2";
    import {HTTP_PROVIDERS} from "@angular/http";
    import {provide, PLATFORM_DIRECTIVES} from "@angular/core";
    import {LocationStrategy, HashLocationStrategy, PathLocationStrategy, PlatformLocation} from "@angular/common";
    import {BrowserPlatformLocation} from '@angular/platform-browser';
    import 'rxjs/add/operator/toPromise';
    import 'rxjs/add/operator/map';

    import { APP_BASE_HREF } from '@angular/common';
    import { disableDeprecatedForms, provideForms } from '@angular/forms';
    import { enableProdMode } from '@angular/core';
    import { bootstrap } from '@angular/platform-browser-dynamic';

    import { InitialStates } from './app.routes';
    import { AppComponent } from './app.component';
    import {MyUIRouterConfig} from "./_bootstrap/router.config";

    if ('' === 'prod') { enableProdMode(); }

    trace.enable(Category.TRANSITION, Category.VIEWCONFIG);

    bootstrap(UIView, [
        disableDeprecatedForms(),
        provideForms(),
        InitialStates,
        {
          provide: APP_BASE_HREF,
          useValue: ''
         },


         provide(LocationStrategy, { useClass: HashLocationStrategy }),

         provide(LocationStrategy, { useClass: PathLocationStrategy }),
         provide(PlatformLocation, { useClass: BrowserPlatformLocation }),

        ...UIROUTER_PROVIDERS,
        ...HTTP_PROVIDERS,

        provide(UIRouterConfig, { useClass: MyUIRouterConfig }),

        provide(PLATFORM_DIRECTIVES, {useValue: [UIROUTER_DIRECTIVES], multi: true})
    ]);

Following is my router config.

import {UIRouter} from "ui-router-ng2";
import {InitialStates} from "../app.routes";
import {Injectable, Injector} from "@angular/core";

@Injectable()
export class MyUIRouterConfig {
  constructor(private injector: Injector) {}

  configure(uiRouter: UIRouter) {
    // Register each state definition (from app.states.ts) with the StateRegistry
    InitialStates.forEach(state => uiRouter.stateRegistry.register(state));

    // Define a default behavior, for when the URL matched no routes
    uiRouter.urlRouterProvider.otherwise(() => uiRouter.stateService.go("app", null, null) && null);
  }
}

解决方案

The same error is thrown for a simple typo, if you write this:

{ provider: MyService, useValue: myServiceMock }

Instead of this:

{ provide: MyService, useValue: myServiceMock }

Note the difference between provider and provide. The correct is provide.

Hope this helps.

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