Document Comes Back After Deleting From Firestore Database.

Question

Document Comes Back After Deleting From Firestore Database.

Asgar Ali 86

In my application I am deleting a document from Firestore database.After deleting The user is redirected to the Mainpage.When the user login with his google account.The document comes back.while checking the Firestore database the document is deleted from the Firestore Database.The code for deeting the document is as below

 public async Task<bool> Delete(User user)  
        {  
            try  
            {  
                var collection = Firebase.Firestore.FirebaseFirestore.Instance.Collection("User");  
                collection.Document(user.Id).Delete();  
                FirebaseFirestore.Instance.Terminate();  
                FirebaseFirestore.Instance.ClearPersistence();  
                return true;  
            }  
            catch (System.Exception) { return false;}  
  
        }

this happens not all the time.sometimes the document is deleted.sometimes the document comes back

Yonglun Liu (Shanghai Wicresoft Co,.Ltd.) 50,126 Reputation points Microsoft External Staff

2022-10-24T09:16:03.097+00:00

this happens not all the time.sometimes the document is deleted.sometimes the document comes back

This should be due to asynchronous execution of the program.

For further investigation, could you please provide more detailed information about how did you call the Delete method?

Asgar Ali 86

The called Delete Method

else if(item.Title == "Delete Account")  
            {  
               bool confirm = await  DisplayAlert("Account Delete", "Are you sure you want to delete your Account", "OK", "Cancel");  
                if (confirm)  
                {  
                     
                   bool deleted =  await Firestore.Delete(user);  
                    await Task.Delay(1000);  
                     
                    if (deleted)  
                    {  
                        await DisplayAlert("Account Delete", "Your Account has been Deleted Successfully", "OK");  
                        user = null;  
                        await Auth.Logout();  
                        await Navigation.PushAsync(new MainPage());  
                    }  
                }  
            }

Yonglun Liu (Shanghai Wicresoft Co,.Ltd.) 50,126 Reputation points Microsoft External Staff

2022-10-27T03:10:36.907+00:00

It could be caused by some sort of local cache, either in memory in your ViewModel or in a local database which would be populating the View Model.

For further investigation, could you please provide more details about where the file is showing back up? Is that in a page on the app or the local file store?
Asgar Ali 86 Reputation points

2022-11-03T20:25:07.717+00:00

By default the Firestore database has Persistence enabled = true.

Firestore Documentation
Offline data persistence
"Firestore supports offline data persistence. This feature caches a copy of the Firestore data that your app is actively using, so your app can access the data when the device is offline. You can write, read, listen to, and query the cached data."

The data comes back when the same user logs in again.even if the user data is deleted.
My question is How can i clear the Cached Data after deleting the users data.

1 answer

Your answer

Yonglun Liu (Shanghai Wicresoft Co,.Ltd.) 50,126 Reputation points Microsoft External Staff

2022-10-24T09:16:03.097+00:00

this happens not all the time.sometimes the document is deleted.sometimes the document comes back

This should be due to asynchronous execution of the program.

For further investigation, could you please provide more detailed information about how did you call the Delete method?
Asgar Ali 86 Reputation points

2022-10-24T13:01:39.617+00:00

The called Delete Method

else if(item.Title == "Delete Account") { bool confirm = await DisplayAlert("Account Delete", "Are you sure you want to delete your Account", "OK", "Cancel"); if (confirm) { bool deleted = await Firestore.Delete(user); await Task.Delay(1000); if (deleted) { await DisplayAlert("Account Delete", "Your Account has been Deleted Successfully", "OK"); user = null; await Auth.Logout(); await Navigation.PushAsync(new MainPage()); } } }
Yonglun Liu (Shanghai Wicresoft Co,.Ltd.) 50,126 Reputation points Microsoft External Staff

2022-10-27T03:10:36.907+00:00

It could be caused by some sort of local cache, either in memory in your ViewModel or in a local database which would be populating the View Model.

For further investigation, could you please provide more details about where the file is showing back up? Is that in a page on the app or the local file store?
Asgar Ali 86 Reputation points

2022-11-03T20:25:07.717+00:00

By default the Firestore database has Persistence enabled = true.

Firestore Documentation
Offline data persistence
"Firestore supports offline data persistence. This feature caches a copy of the Firestore data that your app is actively using, so your app can access the data when the device is offline. You can write, read, listen to, and query the cached data."

The data comes back when the same user logs in again.even if the user data is deleted.
My question is How can i clear the Cached Data after deleting the users data.

Answer 1

My question is How can i clear the Cached Data after deleting the users data.

Since you're asking about Firebase behaviour the best place to find info is in the Firebase docs and repos.
A quick search turned up the the following:

https://github.com/firebase/firebase-android-sdk
Issue: Clear Local Cache while persistenceEnabled is turned on #466
Pull: Make clearPersistence() publicly available #455

And in the Firebase docs:
https://firebase.google.com/docs/reference/android/com/google/firebase/firestore/FirebaseFirestore#clearPersistence()

If you're running into bugs with Firebase getting out of sync you can report them to the Firebase team at https://firebase.google.com/support

Share via

Document Comes Back After Deleting From Firestore Database.

1 answer

Your answer