Reputation: 3091
I am trying to order a query by timestamp.
In my document I have a field called "date" which has this form:
date = {
nanoseconds: 963000000,
seconds: 1594917688
}
In my code I have this:
let photosArray = [];
firebase
.getDatabase()
.collection("photos")
.doc(firebase.getCurrentUser().uid)
.collection("userPhotos")
.orderBy("date", "asc") // Sorted by date in ascending direction
.onSnapshot((snapshot) => {
let changes = snapshot.docChanges();
changes.forEach((change) => {
if (change.type === "added") {
// Get the new photo
const photo = change.doc.data();
// Add the photo to the photos list
photosArray.push(photo);
}
});
// The last photo is at the top of the list
setPhotos(photosArray);
But when I render the list of photos, they are unsorted... For example: the first one taken 2 hours ago, the second one taken 1 minute ago, and the last one taken 2 years ago.
This is how I store the date in firestore
Firebase.js:
getTimestamp = () => firebase.firestore.FieldValue.serverTimestamp();
PhotoUploader.js
await firestore
.collection("photos")
.doc(userId)
.collection("userPhotos")
.add({
id,
date: firebase.getTimestamp(),
});
Upvotes: 3
Views: 3216
Reputation: 317968
If your date field shows a map with two nested fields, that is not really a timestamp, and it won't sort the way you expect. You should take a look at the code that adds the date field to the document, and make sure it uses a timestamp correctly. Either that, or use a single timestamp numeric value that will sort the way you expect.
Upvotes: 0