How to sort a list with Firestore Flutter? - firebase

Question

When creating notes, they are displayed in a different order for me. Notes taken from Firestore. Can I sort the list and display data by creation date, from oldest to newest? I am getting data from firestore
list_note_page.dart
Widget build(BuildContext context) {
return ListView.builder(
itemCount: snapshot.data?.docs.length,
itemBuilder: (context, index) {
QueryDocumentSnapshot<Object?> documentSnapshot =
snapshot.data!.docs[index];
return Dismissible(
key: Key(documentSnapshot.id),
direction: DismissDirection.endToStart,
onDismissed: (direction) {
Database().deleteNote(documentSnapshot.id);
},
background: Container(
padding: const EdgeInsets.only(right: 20),
alignment: Alignment.centerRight,
color: Colors.red,
child: const Text(
'Delete',
style: TextStyle(color: Colors.white, fontSize: 16),
),
),
child: ListTile(
onTap: () => Navigator.push(
context,
MaterialPageRoute(
builder: ((context) => AddAndEditNotePage(
header: documentSnapshot['name'],
title: documentSnapshot['title'],
date: documentSnapshot['date'],
id: documentSnapshot.id,
)))),
title: Text(documentSnapshot['name']),
subtitle: Text(documentSnapshot['title']),
trailing: Text(documentSnapshot['date'] ?? ''),
));
});
}

Answer 1

I recommend to add an additional field to your documents, perhaps called created_date that will take a timestamp of the time when you push it to Firebase, (unless that date field you have there is the creation date of that document) then you can do:
Firestore.instance
.collection('YOUR_COLLECTION')
.orderBy('created_date').get()
By default, the descending order is false (oldest to newest).
Check this link or this for further reference.