Not getting realtime messages

[rohitbhoite]

realtime messages are not working.

In Chat.dart file inside loadMessagesAndListen() method below condition is present.

query.documentChanges.where((doc) {
return doc.oldIndex <= doc.newIndex;
})

If I reverse the condition then I am able to see the realtime messages

query.documentChanges.where((doc) {
return doc.oldIndex >= doc.newIndex;
})

is this condition correct?