How do I cast FieldValue.serverTimestamp() to Kotlin/Java Date Class

How do I cast FieldValue.serverTimestamp() to Kotlin/Java Date Class

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How do I cast FieldValue.serverTimestamp() to Kotlin/Java Date Class
Tag : java , By : Jeskl
Date : January 11 2021, 05:14 PM

may help you . I want to save the date that a post was created in Firestore but I do not want to use the System time. Rather I want to use the server timestamp for accuracy sake. So I am using FieldValue.serverTimestamp() to get the server timestamp but the data type of my variable that holds this is Date. So How can I cast FieldValue.serverTimestamp() to Date? , You get the following error:
data class MyModel(
               val timeStamp: Date? = null)

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how to use FieldValue.serverTimestamp() to custom model class in android

Tag : android , By : Phil Austin
Date : March 29 2020, 07:55 AM
I wish this helpful for you I am using Firestore as a database and now i want to store server timestamp when user register. , After lots of research i found a solution for this.
 private Date timestamp;

 public Date getTimestamp() {
     return timestamp;
 public void setTimestamp(Date timestamp) {
        this.timestamp = timestamp;
UserModel userModel = new UserModel();


How to get a JavaScript Date object from the new `firebase.firestore.FieldValue.serverTimestamp()`

Tag : javascript , By : Mena
Date : March 29 2020, 07:55 AM
fixed the issue. Will look into that further Firebase Firestore recently changed how they manage timestamps, and I'm unable to retrieve a date object from the timestamp. , You just need to do this:

Function FieldValue.arrayUnion() called with invalid data. FieldValue.serverTimestamp() can only be used with update() a

Tag : arrays , By : user126922
Date : March 29 2020, 07:55 AM
I hope this helps you . You can't use FieldValue.serverTimestamp() as the value to union (add) or remove, to or from, an array type value of a document field. If you want to use that timestamp value, you need to pass it directly to a field you're updating or setting.
You'll have to think of another way you structure your data that meets your needs and also satisfies Firestore requirements.

How to use FieldValue.serverTimestamp() as Model class in iOS - swift

Tag : ios , By : Felix Almeida
Date : March 29 2020, 07:55 AM
I wish this help you Try this: assume we have a Firestore structure of this (as shown in the Firestore console)
      stamp: September 18, 2018 at 8:00:00 AM UTC-4
      stamp: September 18, 2018 at 8:01:00 AM UTC-4
      stamp: September 18, 2018 at 8:02:00 AM UTC-4
self.db.collection("timestamps").getDocuments() { (querySnapshot, err) in
    if let err = err {
        print("Error getting documents: \(err)")
    } else {
        for document in querySnapshot!.documents {
            if let stamp = document.get("stamp") {
                let title = document.documentID
                let ts = stamp as! Timestamp
                let aDate = ts.dateValue()
                let formatter = DateFormatter()
                formatter.dateFormat = "yyyy-MM-dd HH:mm:ss ZZZ"
                let formattedTimeZoneStr = formatter.string(from: aDate)
                print(title, formattedTimeZoneStr)
stamp_0 2018-09-18 08:00:00 -0400
stamp_1 2018-09-18 08:01:00 -0400
stamp_2 2018-09-18 08:02:00 -0400

Difference between using FieldValue.serverTimestamp and Date.now

Tag : firebase , By : onurtopcu
Date : March 29 2020, 07:55 AM
hope this fix your issue If you write Date.now() from the client into the database, you're writing the client-side timestamp. If on the other hand you write firestore.FieldValue.serverTimestamp, it ends up writing the server-side timestamp.
There are a few types of changes between the two:
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