Convert date to timestamp for storing into firebase firestore in javascript

Question

I'm currently using Math.floor(Date.now() / 1000) to get the correct timestamp format to add into a document in Firebase, however, the timestamp gets inserted as a number, and not as a timestamp.

I would like to have it inserted as shown below (as a timestamp, not as a number).

Is this possible?

Answer 1

You can simply use the following line:

var myTimestamp = firebase.firestore.Timestamp.fromDate(new Date()); 

.fromDate is a static method from the static Timestamp class from Firebase.

Ref: Firebase Timestamp Doc

Update:

For cloud functions look at JGuo's comment:

If you are writing cloud functions, it becomes admin.firestore.Timestamp.fromDate() – JGuo Jan 21 at 1:56

Answer 2

If you want to store a field as a timestamp in Firestore, you'll have to send a JavaScript Date object or a Firestore Timestamp object as the value of the field.

If you want to use Date, simply say new Date(x) where x is the value in milliseconds that you were trying to add before.

If you want to use Timestamp, you would have to do more work to get that x converted into a combination of seconds and nanoseconds to pass to the constructor, as the documentation suggests.