How to sort firebase storage bucket by the newest (by date descending)?-CodePudding

Can you help me? I'm having trouble sorting files in the Firebase Storage bucket. I knew the list() and listAll() functions will not help me sort, so I tried using timestamps for naming those files. It worked but in ascending order, I'm looking for a way to make the order descending. Thank you.

I tried naming the file with a timestamp but it make the order ascending. I'm expecting descending order (the newest on top).

CodePudding user response：

The simplest solution for solving this problem would be to store the details for each image in the Firestore database. So each image would be represented by a document. So your database structure should look like this:

db-root
 |
 --- images (collection)
      |
      --- $imageId (document)
           |
           --- name: "My awesome image"
           |
           --- url: "https://..."
           |
           --- timestamp: November 16, 2022 at 2:46:19 PM UTC 3

Now, you only have to perform a query and specify the direction:

val db = Firebase.firestore
val query = db.collection("images").orderBy("timestamp", Query.Direction.DESCENDING)

When using this approach, there is no need to provide a timestamp for the time. You can name them whatever you want.