Cloud Firestore : Fetch document from collection to get last message

Asked Jan 16 '19 at 07:49

Active Jan 17 '19 at 03:02

Viewed 505 times

I am implementing chat using cloud firestore.

I have ChatRoom(collection)-> Messages(collection)

Can anyone help me to fetch last message(Last message sent/received any user from two user in a chatroom) from the Messages collection and show in ChatRoom with last message.

Here i have two collection one inside another, so two asynchronous query will be required for multiple chat room

edited Jan 17 '19 at 03:02

asked Jan 16 '19 at 07:49

Shefali Soni

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How exactly do you define what the last message is? – Doug Stevenson Jan 16 '19 at 08:14
Last message sent/received any user from two user in a chatroom – Shefali Soni Jan 16 '19 at 08:36
Possible duplicate of [Get last created document in a Firebase Firestore collection](https://stackoverflow.com/questions/54178951/get-last-created-document-in-a-firebase-firestore-collection) – Alex Mamo Jan 16 '19 at 08:44
Here i have two collection one inside another, so two asynchronous query will be required for multiple chat room – Shefali Soni Jan 16 '19 at 09:56
Sounds like you need to store a timestamp field with each message so you can query for the last one. – Doug Stevenson Jan 16 '19 at 16:20
I have timestamp field, isDeletedOne, isDeletedTwo, Senderid. Here when i fetch list of chat room, i also want to fetch last message of each chatroom. – Shefali Soni Jan 17 '19 at 03:04

Cloud Firestore : Fetch document from collection to get last message

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