javascript - how to write server timestamp in milliseconds to Firestore - Stack Overflow

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I know how to write the server timestamp to Firestore as a date string:

doc_ref.set({ts: firebase.firestore.FieldValue.serverTimestamp()});

but how can I store its unix timestamp as a number instead? Is this even possible? I need to be able to mirror a subset of my Firestore documents in Algolia and I don't believe I can sort an Algolia index by timestamp strings.

I know how to write the server timestamp to Firestore as a date string:

doc_ref.set({ts: firebase.firestore.FieldValue.serverTimestamp()});

but how can I store its unix timestamp as a number instead? Is this even possible? I need to be able to mirror a subset of my Firestore documents in Algolia and I don't believe I can sort an Algolia index by timestamp strings.

• javascript
• firebase
• google-cloud-firestore

Share Follow asked Dec 31, 2017 at 4:31 VincentVincent 1,65111 gold badge1212 silver badges2424 bronze badges

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1 Answer 1

Sorted by: Reset to default 10

It's not being stored as a string in the document - that's just how it serverTimestamp renders in the console. If you examine the ts field more closely, you'll see that it has a type of "timestamp". When you go to edit the value in the console by clicking it, you'll see the type a value clearly shown as a date type. When you read it back out (in JavaScript), you'll get a Date object back, and you can get the unix epoch-based time from that.

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