firestore delete a specific document using Java-CodePudding

Connected to the Firestore database using below code,

Query query = dbFirestore.collection("collectionName").whereEqualTo("columnName ==",XXX);
ApiFuture<QuerySnapshot> apiFutureResults = query.get();

From ApiFuture, apiFutureResults.get() ? How to delete the list of documents one by one from here. In my case its only one document for the given condition. I don't see any delete function underneath apiFutureResults .

FYI. This is pure Java Application. No Android. So No listeners please.

CodePudding user response：

To delete the list of documents one by one, you can use the delete() function as in the following example:

// [START firestore_data_delete_doc]
// asynchronously delete a document

ApiFuture<WriteResult> writeResult = db.collection("cities").document("DC").delete();

// ...

System.out.println("Update time : "   writeResult.get().getUpdateTime());

// [END firestore_data_delete_doc]

It is important to note that Cloud Firestore does not automatically remove the documents in its subcollections when you delete a document. By reference, you can still access the papers in the subcollection.

A document must be deleted manually along with all of the documents contained in any subcollections.