NullInjectorError: InjectionToken angularfire2.app.options 没有提供者 [英] NullInjectorError: No provider for InjectionToken angularfire2.app.options

问题描述

我正在尝试将表单数据插入到 Cloud Firestore 数据库中.下面是我的 x.component.ts 文件，我在其中编写的构造函数出错

私有firestore:AngularFireStore从@angular/core"导入 { Component, OnInit };从 '../shared/group.service' 导入 { GroupService };从'@angular/forms' 导入 { NgForm };//import { NullTemplateVisitor } from '@angular/compiler';从@angular/fire/firestore"导入 { AngularFirestore }；//import { AngularFireModule } from 'angularfire2';//import { AngularFirestoreModule } from 'angularfire2/firestore';@成分({选择器:'应用程序组'，templateUrl: './group.component.html',styleUrls: ['./group.component.css']})导出类 GroupComponent 实现 OnInit {构造函数(私有 groupService:GroupService，私有 Firestore:AngularFirestore){}ngOnInit() {this.resetForm();}重置表格(表格?:NgForm){如果(形式！= null)form.resetForm();this.groupService.formData = {$key:空，名: ''，姓: ''，年龄:无}}onSubmit(表单:NgForm){让数据 = form.value;//this.firestore.collection('groups').add(data);this.resetForm(form);}}

我得到的错误如下.

错误错误:StaticInjectorError(AppModule)[AngularFirestore ->InjectionToken angularfire2.app.options]:StaticInjectorError(平台:核心)[AngularFirestore ->InjectionToken angularfire2.app.options]: NullInjectorError: InjectionToken angularfire2.app.options 没有提供者！在 NullInjector.push../node_modules/@angular/core/fesm5/core.js.NullInjector.get (core.js:8895) at resolveToken (core.js:9140) at tryResolveToken (core.js:9084) at StaticInjector.push../node_modules/@angular/core/fesm5/core.js.StaticInjector.get (core.js:8981) at resolveToken (core.js:9140) at tryResolveToken (core.js:9084) at StaticInjector.push../node_modules/@angular/core/fesm5/core.js.StaticInjector.get (core.js:8981) at resolveNgModuleDep (core.js:21217) at _createClass (core.js:21270) at _createProviderInstance (core.js):21234)

我已经点击了下面的链接，但没有成功.

Angular Fire 问题 1706

Angular Fire 问题 1416

没有 InjectionToken angularfire2.app.options 的提供者>

下面是我的 app.module.ts 文件.

 import { BrowserModule } from '@angular/platform-b​​rowser';从'@angular/core' 导入 { NgModule };从 './app.component' 导入 { AppComponent };从'../environments/environment'导入{环境}从'angularfire2'导入{AngularFireModule}；从 'angularfire2/database' 导入 { AngularFireDatabaseModule };从@angular/fire/firestore"导入 { AngularFirestoreModule, AngularFirestore };从 './groups/groups.component' 导入 { GroupsComponent };从 './groups/group/group.component' 导入 { GroupComponent };从 './groups/group-list/group-list.component' 导入 { GroupListComponent }从'./groups/shared/group.service'导入{GroupService}；从@angular/forms"导入 { FormsModule }@NgModule({声明: [应用组件，组组件，组组件，组列表组件],进口:[浏览器模块，AngularFirestore 模块，AngularFireDatabase 模块，AngularFireModule.initializeApp(environment.firebaseConfig),表单模块],提供者:[AngularFirestore，GroupService]，引导程序:[AppComponent]})导出类 AppModule { }

解决方案

我想我知道解决我问题的答案.我只需要将下面的语句导入到我创建的服务中，并且需要在服务的构造函数中创建对象.

import { AngularFirestore } from '@angular/fire/firestore';

I'm trying to insert the form data in cloud Firestore database. Below is my x.component.ts file in which I'm getting error at constructor where I'm writing

private firestore: AngularFireStore

    import { Component, OnInit } from '@angular/core';
    import { GroupService } from '../shared/group.service';
    import { NgForm } from '@angular/forms';
    // import { NullTemplateVisitor } from '@angular/compiler';
    import { AngularFirestore } from '@angular/fire/firestore';
    // import { AngularFireModule } from 'angularfire2';
    // import { AngularFirestoreModule } from 'angularfire2/firestore';
    
    @Component({
      selector: 'app-group',
      templateUrl: './group.component.html',
      styleUrls: ['./group.component.css']
    })
    export class GroupComponent implements OnInit {
    
      constructor(private groupService: GroupService, private firestore: AngularFirestore) { }
    
      ngOnInit() {
        this.resetForm();
      }
    
      resetForm(form ?: NgForm){
        if(form!= null)
          form.resetForm();
        this.groupService.formData = {
          $key : null,
          firstname: '',
          lastname: '',
          age: null
        }
      }
    
      onSubmit(form : NgForm){
        let data = form.value;
        // this.firestore.collection('groups').add(data);
        this.resetForm(form);
      }
    
    }

The error I get is as below.

ERROR Error: StaticInjectorError(AppModule)[AngularFirestore -> InjectionToken angularfire2.app.options]: StaticInjectorError(Platform: core)[AngularFirestore -> InjectionToken angularfire2.app.options]: NullInjectorError: No provider for InjectionToken angularfire2.app.options! at NullInjector.push../node_modules/@angular/core/fesm5/core.js.NullInjector.get (core.js:8895) at resolveToken (core.js:9140) at tryResolveToken (core.js:9084) at StaticInjector.push../node_modules/@angular/core/fesm5/core.js.StaticInjector.get (core.js:8981) at resolveToken (core.js:9140) at tryResolveToken (core.js:9084) at StaticInjector.push../node_modules/@angular/core/fesm5/core.js.StaticInjector.get (core.js:8981) at resolveNgModuleDep (core.js:21217) at _createClass (core.js:21270) at _createProviderInstance (core.js:21234)

I had followed the links below but no luck.

Angular Fire Issue 1706

Angular Fire Issue 1416

No provider for InjectionToken angularfire2.app.options

Below is my app.module.ts file.

    import { BrowserModule } from '@angular/platform-browser';
    import { NgModule } from '@angular/core';
    import { AppComponent } from './app.component';
    import { environment } from '../environments/environment'
    import { AngularFireModule } from 'angularfire2';
    import { AngularFireDatabaseModule } from 'angularfire2/database';
    import { AngularFirestoreModule, AngularFirestore } from '@angular/fire/firestore';
    import { GroupsComponent } from './groups/groups.component';
    import { GroupComponent } from './groups/group/group.component';
    import { GroupListComponent } from './groups/group-list/group-list.component'
    import { GroupService } from './groups/shared/group.service';
    import { FormsModule } from '@angular/forms'
    
    
    @NgModule({
      declarations: [
        AppComponent,
        GroupsComponent,
        GroupComponent,
        GroupListComponent
      ],
      imports: [
        BrowserModule,
        AngularFirestoreModule,
        AngularFireDatabaseModule,
        AngularFireModule.initializeApp(environment.firebaseConfig),
        FormsModule
      ],
      providers: [AngularFirestore, GroupService],
      bootstrap: [AppComponent]
    })
    export class AppModule { }

解决方案

I think I know the answer which solved my problem. I just had to import the below statement to the service I created and need to create object in constructor of service.

import { AngularFirestore } from '@angular/fire/firestore';

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