在生产版本中得到 ' Uncaught (in promise): Error: StaticInjectorError(a)[t]:'....

Question

Angular 6 App 在 ng build 上运行良好。

但是在 ng build --prod 应用程序 UI 被加载但在登录时，我将从服务器获取 coorect 数据，之后我通过代码导航到仪表板页面this.router.navigate(['/dashboard']);，出现如下错误

错误错误：未捕获（承诺）：错误：StaticInjectorError(a)[t]：StaticInjectorError(Platform：core)[t]：NullInjectorError：t 没有提供者！错误：StaticInjectorError(a)[t]: StaticInjectorError(Platform: core)[t]: NullInjectorError: 没有提供者为 t！在 t.get (main.aa8ef128615c160bd861.js:1) 在 main.aa8ef128615c160bd861.js:1 在 t (main.aa8ef128615c160bd861.js:1) 在 t.8ef5161bd861861.js:1 att.8ef58c6161616161616161000000js:1616ajs861.js:1 js:1 at t (main.aa8ef128615c160bd861.js:1) at t.get (main.aa8ef128615c160bd861.js:1) at Da (main.aa8ef128615c160bd861.js.get8ef16t10js:1(main.aa8ef128615c160bd861.js:1) at ) 在 t.getToken (main.aa8ef128615c160bd861.js:1) 在 t.get (main.aa8ef128615c160bd861.js:1) 在 main.aa8ef128615c160bd861.js:1 在 t.get (main.aa8ef128615c160bd861.js:1) at main.aa8ef128615c160bd861.js:1 在 (main.aa8ef128615c160bd861.js:1) at main.aa8ef128615c160bd861.js:1 在 (main.aa8ef128615c160bd861.js:1) at861d861.js:1 att.8a1d61d61d6.js:1 (main.aa8ef128615c160bd861.js:1) at main.aa8ef128615c160bd861.js:1 at t (main.aa8ef128615c160bd861.js:1)

我的 App.module.ts 看起来像，

 import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { BsDatepickerModule } from 'ngx-bootstrap';
import { BrowserAnimationsModule } from '@angular/platform-browser/animations';
import { HttpClientModule } from '@angular/common/http';
import { ChartsModule } from 'ng2-charts';

import { AppComponent } from './app.component';
import { HomeComponent } from './home/home.component';
import { MaterialModule } from './angular-material/material.module';
import { DashboardComponent } from './dashboard/dashboard.component';
import { AppRoutingModule } from './app.routing-module';
import { FiltersComponent } from './filters/filters.component';
import { SearchComponent } from './search/search.component';
import { ChartComponent } from './chart/chart.component';
import { FormsModule, ReactiveFormsModule } from '@angular/forms';
import { KeysPipe } from './shared/pipes/keys.pipe';
import { PdfViewerModule } from 'ng2-pdf-viewer';
import { AboutComponent } from './about/about.component';
@NgModule({
  declarations: [
    AppComponent,
    HomeComponent,
    DashboardComponent,
    FiltersComponent,
    SearchComponent,
    ChartComponent,
    KeysPipe,
    AboutComponent
  ],
  imports: [
    BrowserModule,
    BrowserAnimationsModule,
    FormsModule,
    ReactiveFormsModule,
    MaterialModule,
    ChartsModule,
    HttpClientModule,
    BsDatepickerModule.forRoot(),
    AppRoutingModule,
    PdfViewerModule
  ],
  providers: [],
  bootstrap: [AppComponent]
})
export class AppModule { }

应用环境是：-

    Angular CLI: 6.0.8
Node: 10.2.1
OS: linux x64
Angular: 6.0.4
... animations, common, compiler, compiler-cli, core, forms
... http, language-service, platform-browser
... platform-browser-dynamic, router

- 0.6.8, .6.8, .6.8, .6.8, -0.6.8, @angular/cdk -6.2.1, @angular/cli -6.0.8, @angular/material - 6.2.1, - 6.0.8, .6.8, - 0.6.8 , rxjs-6.2.1, typescript -2.7.2, webpack -4.8.3

Answer 1

我在我的一个组件中缺少提供程序时遇到了同样的问题，为了更容易调试，我建议这样做：

通过进入 angular.json 文件并编辑 production: 对象来启用详细输出，以便： "aot": true 、"optimization": false、"buildOptimizer": false。

这消除了构建过程中的丑化，因此错误日志包含缺少的模块名称