firebaseArray descending order?

Question

Using firebaseArray, is it possible to order by a specified child key: (https://www.firebase.com/docs/web/guide/retrieving-data.html#section-queries)?

var fi         


        

Answer 1

Here is how you can order by date. Just use queryOrderedByChild(dateKey) and it will be in asc order, to make desc you can do array.reverse()

POST_REF.queryOrderedByChild(PostKeys.kPostDate).observeEventType(.Value, withBlock: {
  snapshot in

  var localPosts = [Post]()
    for item in snapshot.children {
      let postItem = Post(snapshot: item as! FDataSnapshot)
      localPosts.append(postItem)
    }
  //Display at desc order
   let reverseResults = localPosts.reverse() as [Post]
       completion(postsArray: reverseResults)
    }, withCancelBlock: { error in
   completion(postsArray: nil)
})