NullInjectorError: No provider for AngularFirestore

I'm learning Angular looking for help in fixing the error: I'm following this link : to create a angular small app with angular2 and angularfirestore2

but when I hit ng serve I am getting the below error in browser console..

StaticInjectorError[AngularFirestore]: StaticInjectorError[AngularFirestore]: NullInjectorError: No provider for AngularFirestore! at _NullInjector.get (core.js:923) at resolveToken (core.js:1211) at tryResolveToken (core.js:1153) at StaticInjector.get (core.js:1024) at resolveToken (core.js:1211) at tryResolveToken (core.js:1153) at StaticInjector.get (core.js:1024) at resolveNgModuleDep (core.js:10585) at NgModuleRef_.get (core.js:11806) at resolveDep (core.js:12302) 

I tried googling it but didn't find the exact solution nothing worked for me :(,

Here is what I followed: 1) Installed Node Version 8.9.1 2) npm install -g @angular/cli --> Version 1.5.2 3) ng new 'project-name' 4) npm install angularfire2 firebase --save

Here are my app.module.ts file:

import { BrowserModule } from '@angular/platform-browser'; import { NgModule } from '@angular/core'; import { AppComponent } from './app.component'; import { AngularFireModule } from 'angularfire2'; import { environment } from '../environments/environment'; @NgModule({ imports: [ BrowserModule, AngularFireModule.initializeApp(environment.firebase) ], declarations: [ AppComponent ], bootstrap: [ AppComponent ] }) export class AppModule {} 

app.component.ts:

import { Component } from '@angular/core'; import { AngularFirestore } from 'angularfire2/firestore'; import { Observable } from 'rxjs/Observable'; @Component({ selector: 'app-root', templateUrl: './app.component.html', styleUrls: ['./app.component.css'] }) export class AppComponent { title = 'app'; constructor(db: AngularFirestore) {} } 

environemnt.ts:

export const environment = { production: false, firebase: { apiKey: 'xxxxx', authDomain: 'aaaaaaa', databaseURL: 'bbbbbbbbbbbbbbbbbb', projectId: 'aaaaaaaaaaaaaa', storageBucket: 'aaaaaaaaaaaa', messagingSenderId: 'aaaaaaaaaaaaa' } }; 

then ng serve, and I am getting the above error...

12 Answers

You should add providers: [AngularFirestore] in app.module.ts.

@NgModule({ imports: [ BrowserModule, AngularFireModule.initializeApp(environment.firebase) ], declarations: [ AppComponent ], providers: [AngularFirestore], bootstrap: [ AppComponent ] }) export class AppModule {} 

I had same issue and below is resolved.

Old Service Code:

@Injectable() 

Updated working Service Code:

@Injectable({ providedIn: 'root' }) 

Open: ./src/app/app.module.ts
And import Firebase Modules at the top:

import { environment } from '../environments/environment';
import { AngularFireModule } from 'angularfire2';
import { AngularFirestoreModule } from 'angularfire2/firestore';

And VERY IMPORTANT:
Remember to update 'imports' in NgModule:

@NgModule({ declarations: [ AppComponent, OtherComponent // Add other components here ... ], imports: [ BrowserModule, AngularFireModule.initializeApp(environment.firebase, 'your-APP-name-here'), AngularFirestoreModule ], ... }) 

Give it a try, it shall now work.
For detailed information follow the angularfire2 documentation:

Good luck!

Simple Answer.

Whenever you encounter NullInjector error. Reason is always import/providers is missing.

SOLUTION:

1. Please add the module in the imports array inside your module.ts file.

2. Add the services you want to use in the providers array inside your modules.ts file.

@NgModule({}) export class SomeModule{ `imports:[]`, `providers: []` } 

Weird thing for me was that I had the provider:[], but the HTML tag that uses the provider was what was causing the error. I'm referring to the red box below:

It turns out I had two classes in different components with the same "employee-list.component.ts" filename and so the project compiled fine, but the references were all messed up.

Adding AngularFirestoreModule.enablePersistence() in import section resolved my issue:

imports: [ BrowserModule, AngularFireModule, AngularFireModule.initializeApp(config), AngularFirestoreModule.enablePersistence() ] 

I solved this problem by just removing firestore from:

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

in my component.ts file. as use only:

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

this can be also your problem.

For AngularFire2 Latest version

Install AngularFire2

$ npm install --save firebase @angular/fire 

Then update app.module.ts file

 import { BrowserModule } from '@angular/platform-browser'; import { NgModule } from '@angular/core'; import { AppComponent } from './app.component'; import { FormsModule } from '@angular/forms'; import { AngularFireModule } from '@angular/fire'; import { AngularFireDatabaseModule } from '@angular/fire/database'; import { environment } from '../environments/environment'; import { AngularFirestoreModule } from '@angular/fire/firestore'; @NgModule({ declarations: [ AppComponent ], imports: [ BrowserModule, FormsModule, AngularFireModule.initializeApp(environment.firebase), AngularFirestoreModule, AngularFireDatabaseModule ], providers: [], bootstrap: [AppComponent] }) export class AppModule { } 

Check FireStore CRUD operation tutorial here

Change Your Import From :

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

To This :

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

This solve my problem.

I take that to my app.module. After the imports it should be works

providers: [ { provide: LocationStrategy, useClass: HashLocationStrategy }, { provide: FirestoreSettingsToken, useValue: {} } ], 

My Version:

Angular CLI: 7.2.4 Node: 10.15.0 Angular: 7.2.5 ... common, compiler, compiler-cli, core, forms ... language-service, platform-browser, platform-browser-dynamic ... router Package Version ----------------------------------------------------------- @angular-devkit/architect 0.12.4 @angular-devkit/build-angular 0.12.4 @angular-devkit/build-optimizer 0.12.4 @angular-devkit/build-webpack 0.12.4 @angular-devkit/core 7.2.4 @angular-devkit/schematics 7.2.4 @angular/animations 8.0.0-beta.4+7.sha-3c7ce82 @angular/cdk 7.3.2-3ae6eb2 @angular/cli 7.2.4 @angular/fire 5.1.1 @angular/flex-layout 7.0.0-beta.23 @angular/material 7.3.2-3ae6eb2 @ngtools/webpack 7.2.4 @schematics/angular 7.2.4 @schematics/update 0.12.4 rxjs 6.3.3 typescript 3.2.4 webpack 4.28.4 

import angularFirebaseStore 

in app.module.ts and set it as a provider like service

I had the same issue while adding firebase to my Ionic App. To fix the issue I followed these steps:

npm install @angular/fire firebase --save 

In my app/app.module.ts:

... import { AngularFireModule } from '@angular/fire'; import { environment } from '../environments/environment'; import { AngularFirestoreModule, SETTINGS } from '@angular/fire/firestore'; @NgModule({ declarations: [AppComponent], entryComponents: [], imports: [ BrowserModule, AppRoutingModule, AngularFireModule.initializeApp(environment.firebase), AngularFirestoreModule ], providers: [ { provide: SETTINGS, useValue: {} } ], bootstrap: [AppComponent] }) 

Previously we used FirestoreSettingsToken instead of SETTINGS. But that bug got resolved, now we use SETTINGS. (link)

In my app/services/myService.ts I imported as:

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

For some reason vscode was importing it as "@angular/fire/firestore/firestore";I After changing it for "@angular/fire/firestore"; the issue got resolved!