如何从 cloud-firestore 中的集合接收所有文档对象？

Question

When I try to receive a document from a subcollection I get an object with only the values from the document.

The response looks like this:

{
 id: mealDocumentId,
 name: 'Burger',
 imageUrl: 'imgUrl1',
 price: 3, quantity: 1
} 

Is there a way to receive the object from the entire document?

I was expecting the objects from the documents similar to this:

 {
  mealDocumentId1: {
    name: 'Burger1',
    imageUrl: 'imgUrl1',
    price: 1,
    quantity: 1,
  },
  mealDocumentId2: {
    name: 'Burger2',
    imageUrl: 'imgUrl2',
    price: 2,
    quantity: 2,
  },
 }

The Code I'm running:

 constructor(private db: AngularFirestore) { }

  getAllMealDocuments() {
    // this is the path to the subselection meals
    const docRef = this.db.collection('tables').doc('documentId').collection('meals');
    
    // try to get a document object and pass it.
    return  docRef.snapshotChanges().pipe(map(document => {
      document.map(doc => {
        return new Meal({
          id: doc.payload.doc.id,
          ...(doc.payload.doc.data() as {})
        });
      });
    }));
  }

Is there another way to receive all the documents? Preferably like the expected formate? Thanks!

Answer 1

It sounds like you're looking for the documentChanges stream , which (unlike valueChanges ) includes the ID of each document in its output.

I'd recommend checking out the AngularFire documentation on streaming collection data for the types of streams, and the differences between them.