如何使用Ionic4 / Angular在嵌套的Firestore数据库中检索所有用户的数据

Question

I am trying to retrieve the data of all my users in a nested Firestore database using angular. The data base looks like this users (id) -> posts(id) - { description: this is an image, image: imageURL} .

I am using a firebase function in this ionic app, and I can successfully get the data of a single user id using this code in the index.ts file.

const docs = await 

admin.firestore().collection('people').doc('R7iR7csLaDZuhUvZJWiFCcaLt903').collection('tasks').limit(5).get()

    return docs.docs.map(doc => {
    return {
        postID: doc.id,
        ...doc.data()
      }
   }) 
})

However this only gets the data of a single file path in the database structure, and I want to retrieve the data of all the docs ID and not just one id.

the home.ts file looks like this

constructor(private aff: AngularFireFunctions) {}
 ngOnInit() {

const getFeed = this.aff.httpsCallable('getFeed')
this.posts = getFeed({}).subscribe(data=> {
  console.log(data)
  // this.posts = data
    })
}

Answer 1

You most likely will want to normalize your database so you're not making calls into nested collections, if you really want to get all of the posts for all users. To download an entire collection, it would be something like this:

const docs = await admin.firestore().collection('people').get()

Simply ping the collection and not a document