How do you delete a document by timestamp in firestore flutter?

Question

Firestore Database Image

So I am trying to make a chat app with cloud Firestore and I don't how to delete a document by timestamp.

This is currently how I delete a document.but when I tried it deletes all the document:

onLongPress: () async {
  await FirebaseFirestore.instance
      .collection('messages')
      .doc(
          groupChatId)
      .collection(
      groupChatId)
      .orderBy("timestamp",descending: true).get().then((value) => {
        for(DocumentSnapshot ds in value.docs){
          ds.reference.delete()
        }
  });
},

does this answer your question https://stackoverflow.com/questions/32004582/delete-firebase-data-older-than-2-hours — griffins, Feb 11 '22 at 11:05
Are you sure that `groupChatId` holds the correct value? Besides that, do you have the propper rules set? — Alex Mamo, Feb 11 '22 at 11:09

score 0 · Answer 1 · answered Feb 12 '22 at 18:19

try this code:

await FirebaseFirestore.instance
      .collection('messages')
      .doc(
          groupChatId)
      .collection(
      groupChatId)
      .where("timestamp", isLessThan: DateTime.now().microsecondsSinceEpoch-TheNumberOfMicrosencundenTheDocumentCanBeOld).get().then((value) => {
        for(DocumentSnapshot ds in value.docs){
          ds.reference.delete()
        }
  });

How do you delete a document by timestamp in firestore flutter?

1 Answers1