Flutter Firestore date

Question

I know this is duplication but since I haven't been able to find correct way so please don't mark this as duplicate. I would like to set date type correctly to Firestore in flutter. I tried DateTime.now() but when I retrieve it error says

Unsupported value: FIRTimestamp: seconds=1533950401 nanoseconds=81000000> of type FIRTimestamp

and app will crash. Also I tried millisecondsSinceEpoch, microsecondsSinceEpoch, toUtc but Firestore recognize those as number not timestamp. I used intl package and formatted like yyyy-MM-dd hh:mm but it was recognized as String. Does anyone know how to set timestamp correctly?

Answer 1

Use

FieldValue.serverTimestamp()

Answer 2

The Firestore database only has a Timestamp field record. The following worked and saved the timestamp properly.

Firestore.instance.collection('COLLECTION_NAME').add({
   'weight': someDoubleValue,
   'when': DateTime.now(),
});

This is with

firebase_core: ^0.2.5
cloud_firestore: ^0.8.2