I am trying to get readable date from firestore

问题

I am trying to get readable date from Timestamp data type in my firestore database.

for (var ticketDoc of ticketsSnapshot.docs) {
            var timeStamp = await ticketDoc.data().TimePreferred;
            console.log(timeStamp.toDate());
            var time = new Date(timeStamp).toDate();
            ticketDoc.data().TimePreferred = time;
            tickets.push(ticketDoc.data());
        }

I read the question about a similar problem at :

How do I convert a Firestore date/Timestamp to a JS Date()?

so, i tried to do same and i expect the output of readable date, although it gives me the correct result in

console.log(timeStamp.toDate());

but also it gives me an error. Console output as follow :-

2019-04-10T06:30:00.000Z
TypeError: (intermediate value).toDate is not a function

Not : I am trying to get readable date in postman

回答1:

Change the following line:

var time = new Date(timeStamp).toDate();

into this:

var time = new Date(timeStamp).toDateString();

From the docs:

A string representing the date portion of the given Date object in human readable form in American English.

回答2:

Have you tried changing this to

var time = (new Date(timeStamp)).toDateString();

回答3:

If the TimePreferred field in your document is a Timestamp, you can get a valid Date object from it by simply calling toDate() on it.

So:

for (var ticketDoc of ticketsSnapshot.docs) {
    var date = ticketDoc.data().TimePreferred.toDate();
}

None of these calls are asynchronous or returning a promise, so you don't need await.

回答4:

I don't know why this timestamp object doesn't have the .toDate() extension, but if it has the 'seconds' and 'nanoseconds' properties, you can turn it to a JS Data with

Date(data.seconds)

来源：https://stackoverflow.com/questions/55608589/i-am-trying-to-get-readable-date-from-firestore