observeSingleEvent with queryEqual to value doesn't work - ios

Question

So, I want to check if user's device is in my list (for testing). For this I have a small set of values in my Firebase dataset.
It looks like that:
But when I'm trying to check if the user's id is in this list, I'm getting nothing.
let childString = "tempfreeuuid/"
let pointref = ref.child(childString)
let query = pointref.queryOrderedByKey().queryEqual(toValue: "FFFFF")
query.observeSingleEvent(of: DataEventType.value) { (snapshot) in
if snapshot.hasChildren() {
print("that's good")
} else {
print("snapshot has no children")
}
}
And the result is "snapshot has no children".
I've already tried query.observeSingleEvent(of: .childAdded) (doesn't work), .queryLimited(toFirst: 3), and .queryOrderedByKey() — these two don't work either.
At the same time this query is working if I'm not trying to use queryEqual.
What am I doing wrong?
update: I want to clarify the problem I have. I don't have any results, snapshot is null. At the same time if I'm using queryLimited(toFirst: 1) instead of queryEqual, I'm getting one result from the table to work with. It seems to me it's not about snapshot issues, it's about query without any results.

Answer 1

You are using the wrong OrderedBy method. Because you are using queryOrderedByKey the queryEqual function will check if its equal to the Key while you want to compare it to the Value.
Instead you should be using queryOrderedByChild or queryOrderedByValue to make sure you compare the right values.
Here is the reference to the firebase docs explaining how queries (specificly queryEqualToValue in your case) work.