Angular Hybrid错误:尝试在设置AngularJS注入器之前获取它 [英] Angular Hybrid Error: Trying to get the AngularJS injector before it being set

问题描述

我有AngularJS应用程序，我正在尝试制作混合应用程序，但无法使用AngularJS服务洞察力Angular组件:出现错误

I have AngularJS application and i am trying to make hybrid app but not able to use AngularJS service insight Angular component : getting error

错误错误:尝试在设置AngularJS注入器之前获取它.

ERROR Error: Trying to get the AngularJS injector before it being set.

我的main.ts是

import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { AppModule } from './app.module';
platformBrowserDynamic().bootstrapModule(AppModule);

app.module:

app.module :

import { BrowserModule } from '@angular/platform-browser';
import { NgModule, InjectionToken } from '@angular/core';
import { FormsModule } from '@angular/forms';

import { UpgradeModule, downgradeComponent } from '@angular/upgrade/static';
import { AppComponent } from './app.component';
import { SignInComponent } from "./modules/login/components/sign-in/sign-in.component";
import { authServiceProvider } from './shared/angularJS-upgraded-providers';



@NgModule({
    declarations: [
        AppComponent,
        SignInComponent
    ],
    imports: [
        BrowserModule,
        UpgradeModule,
        FormsModule
    ],
    entryComponents: [
        SignInComponent
    ],
    providers: [authServiceProvider],
    bootstrap: [SignInComponent]
})

export class AppModule {
    ngDoBootstrap() {}
}

angularJS-upgradeed-providers.ts:

angularJS-upgraded-providers.ts :

import { InjectionToken } from "@angular/core";
export const AuthService = new InjectionToken<any>('authService');

export function authServiceFactory(i: any) {
  return i.get('authService');
}

export const authServiceProvider = {
  provide: AuthService,
  useFactory: authServiceFactory,
  deps: ['$injector']
};

和sign-in.component.ts:

and sign-in.component.ts :

import { Component, Inject } from '@angular/core';
import {AuthService} from "../../../../shared/angularJS-upgraded-providers";

@Component({
    selector: 'sign-in',
    template: require('./sign-in.component.html')
})

export class SignInComponent {
    constructor(
        @Inject(AuthService) private authService: any) {
    }
}

当我删除SignInComponent构造函数时，部分代码可以很好地编译，但是使用@Inject(AuthService)私有authService:任何){}部分，我都会遇到错误:

When I remove SignInComponent constructor part code compiles well but with @Inject(AuthService) private authService: any) { } part I am getting an error :

尝试在设置之前获取AngularJS注入器.

Trying to get the AngularJS injector before it being set.

请给我一些建议，说明如何实现angularJS服务见解Angular组件. 谢谢

Please give me some suggesting how can I implement angularJS service insight Angular component. Thanks

P.S.我的package.json:

P.S. my package.json :

{
  "name": "test",
  "version": "1.0.0",
  "private": true,
  "scripts": {
    "start": "webpack-dev-server --port=4200 --open chrome"
  },
  "dependencies": {
    "@angular/common": "^5.2.11",
    "@angular/compiler": "^5.2.11",
    "@angular/core": "^5.2.11",
    "@angular/forms": "^5.2.11",
    "@angular/http": "^5.2.11",
    "@angular/platform-browser": "^5.2.11",
    "@angular/platform-browser-dynamic": "^5.2.11",
    "@angular/router": "^5.2.11",
    "@angular/upgrade": "^5.2.11",
    "core-js": "^2.5.7",
    "reflect-metadata": "^0.1.12",
    "rxjs": "^5.5.11",
    "zone.js": "^0.8.26"
  },
  "devDependencies": {
    "@types/jquery": "^3.3.6",
    "@types/node": "^8.10.23",
    "awesome-typescript-loader": "^5.2.0",
    "css-loader": "^1.0.0",
    "html-loader": "^0.5.5",
    "html-webpack-plugin": "^3.2.0",
    "raw-loader": "^0.5.1",
    "style-loader": "^0.22.1",
    "ts-loader": "3.2.0",
    "typescript": "^2.9.2",
    "webpack": "^4.16.5",
    "webpack-cli": "^3.1.0",
    "webpack-dev-server": "^3.1.5"
  }
}

和AngularJS版本:1.6.8

And AngularJS version : 1.6.8

推荐答案

这意味着您正在组件树中的某个位置引入AngularJS依赖项.它可能在您的直接组件中，也可能在某些依赖项中.

This means you are pulling in an AngularJS dependency somewhere in your component tree. It may be in your immediate component or some dependency further down the line.

要调试:

方法1

在您的bootstrap调用之前立即添加debugger语句:

Add a debugger statement immediately before your bootstrap call:

it('should render the component', () => {
   debugger;
   bootstrap(Ng2AppComponent);
   ...
 });

1. 打开JS控制台，让测试运行并在调试器位置暂停.
2. 单击停止/暂停"图标(在源"选项卡的侧栏中)，然后选中异常暂停".取消暂停调试器.
3. 调试器应在对injectorFactory的调用中停止.使用堆栈资源管理器查找对resolveNgModuleDep的调用.这些将是递归的，因此堆栈的顶部将更靠近叶节点，而堆栈下方的调用将更靠近要测试的组件.查找类似以下的行:tokenKey = "ServiceName".这可能是您的冒犯性服务.
4. 再向下一层堆栈，查找哪个组件试图注入该服务.
5. 在测试中，模拟出提供程序以处理该特定注入.请注意，此代码仅假设有一个问题注入.对于多个进样器问题，您将需要对以下情况进行特殊处理:

1. With your JS Console open, let the test run and pause at the debugger location.
2. Click the Stop/Pause icon (in the sidebar on the 'sources' tab) and checkmark "Pause on Exceptions". Unpause the debugger.
3. The debugger should stop within a call to injectorFactory. Use the stack explorer to find calls to resolveNgModuleDep. These will be recursive, so the top of the stack will be closer to a leaf node, while calls further down the stack will be closer to your component being tested. Look for lines like: tokenKey = "ServiceName". This is potentially your offending service.
4. Dive down the stack one more layer to find which component tried to inject that service.
5. Within your test, mock out a provider to handle that specific injection. Note that this code assumes only one problem injection. For multiple injector issues, you will need to special case these:

 beforeEach(() => {
   setupModule({
     imports: [
       ...
     ],
     providers: [
       {
         provide: '$injector',
         useValue: {
           get: () => {
             return new MockService();  // enhance as needed
           },
         }
       }
     ],
   });

方法2

1. 模拟出$injector调用的提供程序，并返回一个空对象.

1. Mock out a provider for the $injector call, and return an empty object.

beforeEach(() => {
   setupModule({
     imports: [
       ...
     ],
     providers: [
       {
         provide: '$injector',
         useValue: {
           get: (serviceName?: string) => {
            console.log('looking for serviceName:', serviceName);
            return {};  // this will break things differently
           },
         }
       }
     ],
   });

1. 查看您的控制台输出以找到有问题的服务/签名.与方法1相比，这可能涉及或可能不涉及较少的工作.

这篇关于Angular Hybrid错误:尝试在设置AngularJS注入器之前获取它的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！