Request result structure firebasedatabase Swift - swift

Question

Looking to retrieve value of custom class from a snap in swift like i do in java , i use Firebasedecoder .
Works fine but i need the following structure
{
username = uiii;
email = test#rom.com
..}
If i make ordered requests like .queryOrdered(ByCHild:email).queryEqual("uiii"), i get the resquest with a previous node :
{
"hjhj"= {
username = uiii;
email = test#rom.com
..} }
Looking for a way to either remove the uneccessary values or to have the correct snap structure.

Answer 1

When you execute a query against the Firebase Database, there will potentially be multiple results. So the snapshot contains a list of those results. Even if there is only a single result, the snapshot will contain a list of one result.
To get to the individual node(s) in the result, you need to loop over snapshot.children, as shown in the Firebase documentation on listening for value events on a list of children.
Also see:
previous questions about looping over children
Get the data from all children in firebase using swift
Firebase queryOrderedByChild() method not giving sorted data for an alternative if you want to only receive a single child node and only once

Answer 2

In short, if you have extra data at the same level and that makes decodeFirebase crash, you still can use it:
let value = snapshot.value
let modifiedValue:NSMutableDictionary = (value as AnyObject).mutableCopy() as! MutableDictionary
You then can remove elements by key: modifiedValue.removeObject(forKey: test)
and then apply decode.

Answer 3

custom class USER with all values in the pictures
import Foundation
import SwiftUI
import Firebase
import CodableFirebase
//knowing the userid , clean beautiful result with Firebasedecoder
func cleanResultWithCodebableFirebase(){
ref.child("3oleg").observeSingleEvent(of: .value, with: { snapshot in
guard let value = snapshot.value else { return }
do {
let user = try FirebaseDecoder().decode(User.self, from: value)
print(user.getUser_id())
} catch let error {
print(error)
}
})
}
not knowing userID dirty result
func customwithdirtylists(){
let query = ref.queryOrdered(byChild: Strings.field_username).queryEqual(toValue: "uiiii")
query.observeSingleEvent(
of: .value, with: { (snapshot) -> Void in
for child in snapshot.children {
let childSnapshot = snapshot.childSnapshot(forPath: (child as AnyObject).key)
for grandchild in childSnapshot.children{
let grandchildSnapshot = childSnapshot.childSnapshot(forPath: (grandchild as AnyObject).key)
//possible from here to get the key and values of each element of the custom class
}
}
})
}
This is the code i use in both cases, direct request or when ordered . No list visible when direct with the help of firebase decode .Ugly way to rebuild custom class thru looping . I m sure there are more elegant ways to do it especially when all i need is just remove one value of the direct result to have a clean result