How to recover the time (HH: MM) timestamp stored in Cloud Firestore?

I have a problem
I am saving a datetime with:

created_at: firebase.firestore.FieldValue.serverTimestamp(),


I'm trying to retrieve the time, by reading each doc:

renderMensaje: function(msj) {
var date = new Date(msj.data().created_at * 1000);
// Hours part from the timestamp
var hours = date.getHours();
// Minutes part from the timestamp
var minutes = date.getMinutes();
date = hours + ":" + minutes;
// ...


But, it doesn't work right.

console.log(date); // => Wed Dec 31 1969 18:00:00 GMT-0600 (hora estándar central)

console.log(msj.data().created_at);
// => Timestamp(seconds=1535222867, nanoseconds=351000000)


How can I get the time (HH:MM)?

2 Answers
2

Firestore stores dates in documents as a Timestamp type object. If you want to get a Date object from a timestamp field in the document, you'll have to use its toDate() method to convert it.

Issue - Firestore returns a Timestamp object

Resolution - Convert msj.data().created_at to JS Date object using toDate()

msj.data().created_at

Code Snippet

renderMensaje: function(msj)
var date = msj.data().created_at.toDate();

// Hours part from the timestamp
var hours = date.getHours();

// Minutes part from the timestamp
var minutes = date.getMinutes();

date = hours + ":" + minutes;



Also, check MomentJs. It is a lightweight, simple date library for parsing, manipulating, and formatting dates.

new Date(your_timestamp)

date

created_at

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