Firebase: .priority value

Question

• How do I check the .priority values are in my \"Forge\"?
• According to docs, smaller .priority value comes before larger .priority value. If I use seconds since ep

Answer 1

You can see .priority in a json by "Export JSON" from the Forge.

Answer 2

use

snapshot.getPriority();

more at https://www.firebase.com/docs/javascript/firebase/setwithpriority.html

Answer 3

It's not available from Forge but you can see it from the JSON format:

https://YOURAPP.firebaseio.com/.json?print=pretty&format=export

Answer 4

There's no way in Forge right now to see the actual priority values, but the children will be sorted correctly.

If what you want is to sort items in reverse-chronological-order, I'd suggest simply setting the priority to a normal timestamp (or using push -- it orders them automatically). You can then simply render them backwards to achieve the reverse order you want. For example, rather than appending new messages to the bottom of a list in your app, you could insert them before the first element.

Answer 5

snapshot.exportVal()

Exports the entire contents of the DataSnapshot as a Javascript object. This is similar to val(), except priority information is included (if available), making it suitable for backing up your data.

The export format is a Javascript object with ".priority" entries added to any object with a priority. In the case of primitive values (a string, number, or boolean) with a priority, the value is wrapped in an object with ".value" and ".priority" properties. In the case of primitive values without a priority, a primitive value is returned.

Source: https://www.firebase.com/docs/web/api/datasnapshot/exportval.html