AngularFireModule from @angular/fire/compat not providing the database appropriately.

So I've been facing an issue for the past couple of days where whenever I try to use the **AngularFireDatabase** database to read or write to my Firebase database my console gives me the error:

`No provider found for Database2. Source: Standalone[_Homecomponent].`

I'm currently running Angular 20.0 as AngularFire 21.0 is yet to be fully fleshed out.

My dummy service to test the data looks like this below:

`import { Injectable } from '@angular/core';`
`import { AngularFireDatabase } from '@angular/fire/compat/database';`
`@Injectable({`
` providedIn: 'root'`
`})`
`export class Postingservice {`
`constructor(private afDb:AngularFireDatabase){}`
`viewPosts(){`
`return this.afDb.list("/posts").valueChanges();`
`}`
`}`

I've both tried instantiating the afDb in the constructor and using the inject() function and neither have worked to any avail.

Here also is my app.config.ts:

`import { ApplicationConfig, provideBrowserGlobalErrorListeners, provideZoneChangeDetection } from '@angular/core';`
`import { provideRouter } from '@angular/router';`

`import { initializeApp, provideFirebaseApp } from '@angular/fire/app';`
`import { getDatabase, provideDatabase } from '@angular/fire/database';`
`import { routes } from './app.routes';`

`export const appConfig: ApplicationConfig = {`
` providers: [`
`provideBrowserGlobalErrorListeners(),`
`provideZoneChangeDetection({ eventCoalescing: true }),`
` provideRouter(routes), `
`provideFirebaseApp(() => `
` initializeApp({`
`// FIREBASE CONFIG DATA`
`})),`
`provideDatabase(() => getDatabase()),`
`]`
`};`

I've even provided the provideDatabase() function even as it's not necessary for the AngularFireDatabase as a provider and likewise it's been to no avail...

And my application is bootstrapping correctly as it runs just fine until I create an instance of the afDb database in a component where I then get the above stated error. Kindly help.

Bắt đầu bằng cách tái hiện lỗi injection với app.config.ts được cung cấp và Postingservice inject AngularFireDatabase. Đọc phần thiết lập cơ sở dữ liệu compat cùng với phần thiết lập standalone provider, sau đó xác minh rằng AngularFireDatabase có thể được inject và viewPosts() đọc /posts mà không gặp lỗi No provider found.

Do mô hình lập chỉ mục viết ra từ nội dung của issue.