The NullInjectorError has occurred due to the absence of a provider for the InjectionToken angularfire2.app

I am currently working on inserting form data into a Cloud Firestore database. Below is my x.component.ts file where I encountered an error in the constructor section:

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 message I received is as follows:

 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 have tried to troubleshoot using the following links, but without success.

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 { }
angulartypescriptfirebasegoogle-cloud-firestoreangular7

Answer №1

It's unclear when this issue cropped up with AngularFire, but if you install AngularFire Auth using ng add @angular/fire, you may encounter an error when trying to import AngularFireAuth in a component.

To resolve this, you can resolve this by bringing in FIREBASE_OPTIONS from @angular/fire/compat and including the following snippet in your module.ts file under the providers section:

{ provide: FIREBASE_OPTIONS, useValue: environment.firebase }

Huge thanks to Saumya for providing this solution.

Answer №2

After thorough investigation, I have successfully identified the solution to my issue. Simply by incorporating the following code snippet into the service I generated and instantiating an object within the service constructor.

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

Answer №3

The issue is likely due to trying to include AngularFirestore in the providers array of your AppModule. To resolve this, ensure that you import AngularFirestoreModule into your module for AngularFirestore to be available for injection. Remove AngularFirestore from the providers:

import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { AppComponent } from './app.component';
import { environment } from '../environments/environment'
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';
import { AngularFireModule } from '@angular/fire';
import { AngularFirestoreModule } from '@angular/fire/firestore';
import { AngularFireDatabaseModule } from '@angular/fire/database';

@NgModule({
  declarations: [
    AppComponent,
    GroupsComponent,
    GroupComponent,
    GroupListComponent
  ],
  imports: [
    BrowserModule,
    AngularFireModule.initializeApp(environment.firebaseConfig),
    AngularFirestoreModule,
    AngularFireDatabaseModule,
    FormsModule
  ],
  providers: [GroupService],
  bootstrap: [AppComponent]
})
export class AppModule { }

Be sure to update any import paths based on the official installation documentation.

Additionally, check that you are only using @angular/fire in your dependencies and not both @angular/fire and angularfire2. Use @angular/fire in your imports and remove any references to angularfire2 in your package.json file and imports.

This should help address the issue!

Answer №4

To solve this issue, the recommended approach is to import AngularFirestore by using the following syntax:

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

Instead of importing it like this:

import { AngularFirestore } from 'angularfire2/firestore';

I hope this information proves helpful to someone.

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