Firebase 按字段对集合进行排序

Question

I have a FireBase Collection ('Messages'):

I want to sort the collection by specifiec field ('timeStamp').

1. How can I sort it by timeStamp?
2. Is there any way to sort the docs by timeStamp on Firebase instead of sort it while getting snapshot

Answer 1

You should definitely read the documentation on ordering query results . Use the orderBy method to specify which field should be sorted.

firestore.collection("messages").orderBy("timeStamp")