Accessing Specific key on Firebase (Swift) - ios

Question

I am trying to update child values within firebase.
User first will create a new order, it creates two nodes, one in the main orders section and second under user to keep clean records. this seem to have worked but I am struggling to update values
then while he is on the form and makes updates, I want firebase to update simultaneously on firebase. How do I access to that specific key as nothing seem to have worked for me when I tried using observe method.
What will be the best way to access that key that the form is on and update values?

Answer 1

This is how you can update values in Firebase:
func updateDatabaseForEdits() {
let updates : [AnyHashable: Any] = ["variableName": value,
"variableName2": value]
ref.child("COrders").child("specificKeyYouWantToEdit").updateChildValues(updates, withCompletionBlock: { (error, success) in
if error != nil {
// upload failed
return
}
else {
// upload worked
// update your locally stored values
}
})
}
There are other issues with you app though. Specifically, how you're storing the data. How do you expect to know which key to access? I recommend you update your data store to be something like this:
desikhanapeena {
COrder {
key123 {
orderInformation
}
}
UserOrders {
uid {
key123
orderInformation
}
}
}
Let me know if you have questions:
If you want to get the key from a snapshot you can do that like this:
for child in snap.children {
let child = child as? DataSnapshot
if let key = child?.key {
// print(key)
}
}
If you want to get the key before you upload you can do that like this:
let key = ref.child("COrders").childByAutoId().key

Answer 2

in case if you are still looking for answer.
Answer for Prob #1.
you need to update order value for user, if it successfull then take parent key (in your case , its AutoID) from there , and using this key, update in "Corders".
here is the code
func updateBothValue(){
let value = ["key":"data","key1": "data2"]
REF.child("Users").child(UID).child("UserCorder").childByAutoId().setValue(value){
error, ref in
guard error == nil else { return }
let key = ref.key
REF.child("Coorders").child(key).setvalue(value)
}
}
for Prob #2, as you written "access that key that the form is on". for each form data , store the key which you get from firebase in previous steps. and use this key for updates.