Deleted Firestore documents still being retrieved

Question

I have deleted some documents through a batch delete from a trigger in Cloud Functions. The console shows them as being deleted, however, my app still retrieves the docs! This has got to be a bug with firestore and it's a pretty major one. I found another user had the same problem here

The path I'm using is /users/{id}/timeline/{postId}. I deleted a specific postId.

score 6 · Accepted Answer · answered Feb 22 '18 at 12:08

6

Probably you have the problem, that the app uses the cache and loads as well some documents from it. One thing you could try is to disable the offline persistence.

If you're using Android with Real-Time Database you could try this:

FirebaseDatabase.getInstance().setPersistenceEnabled(true);

iOS + Real-Time Database

Database.database().isPersistenceEnabled = true

If you're using FireStore then use the following:

Android:

FirebaseFirestoreSettings settings = new FirebaseFirestoreSettings.Builder()
        .setPersistenceEnabled(false)
        .build();
db.setFirestoreSettings(settings);

iOS:

let settings = FirestoreSettings()
settings.isPersistenceEnabled = false

// Any additional options
// ...

// Enable offline data persistence
let db = Firestore.firestore()
db.settings = settings

answered Feb 22 '18 at 12:08

Julian Schmuckli

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1

That was it! Thank you. – Tometoyou Feb 22 '18 at 13:35
@Tometoyou I don't know really but take a look at this: https://stackoverflow.com/q/23908189/5508719 – Julian Schmuckli Feb 22 '18 at 14:29
Also for Firestore is: FirestoreSettings().isPersistenceEnabled = false – Ahmadreza Nov 27 '18 at 16:41
I'm doing this server-side, what's the option for that? – Oliver Dixon Feb 16 '20 at 05:07
what do i need to import for this settings to work? – azheen Jul 09 '20 at 21:10

score 4 · Answer 2 · answered Nov 04 '18 at 22:34

Documents remain fetchable for a while after deletion. Their existence status rely on the DocumentSnapshot property - 'exists' and can be read and filtered in the pipe with snapshotChanges() method for docs and collections. See the example below:

...
.snapshotChanges()
      .pipe(
        map((actions: DocumentChangeAction<T>[]) => {
          return actions
            .filter((a: DocumentChangeAction<T>) => a.payload.doc.exists)
            .map((a: DocumentChangeAction<T>) => {
              const data: T = {...a.payload.doc.data() as {}} as T;
              data['id'] = a.payload.doc.id;
              return data;
            });
        })
      );

Deleted Firestore documents still being retrieved

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