How To Search in Database Firebase - swift

Question

I did my search on Stackoverflow but I didn't find the solution I'm looking for
I want to search in database firebase if The "Name" is equal to The name in Navigation Title and also the "Email" that user use to signIn is equal to The Email in Database then it will avoid user to add new item
The Json looks like this
"Items" : {
"-KUMSKLFqMjclbqygnPL" : {
"Item" : "asdfg"
"Name" : "Fadi”,
"User Email" : "i#i.com"
}
}
My code is
let databaseRef = FIRDatabase.database().reference()
var NAME : String!
var UserEmail : String!
var email : String!
databaseRef.child("Items").queryOrderedByKey().observe(.childAdded, with: { snapshot in
let snapshotValue = snapshot.value as? NSDictionary
NAME = (snapshotValue?["Name"] as? String)!
UserEmail = (snapshotValue?["User Email"] as? String)!
email = (FIRAuth.auth()?.currentUser?.email)!
if NAME == navigationItem.title {
if UserEmail == email {
print ("you can't add new item \(UserEmail)")
}else if UserEmail != email {
print("you can add new Item")
}
}
})
My problem is If there is name equal Fadi but there are two different emails
The result will be
you can't add new item Optional("i#i.com")
you can add new Item
It should print only
you can't add new item Optional("i#i.com")
I don't know how to Break it , Right now it's looks like it looping through all database
Updated :
I try the Dravidian answer
Result of print(snapShot.value) :
"-KUMS7J-rCglHrVGX840" = {
"Item" = "asdsd"
"Name" = "a";
"User Email" = "a#a.com";
};
The result is right! but now I need to extract User Email from that node

Answer 1

If you are looking for finding the node which has a specific name try this:-
let databaseRef = FIRDatabase.database().reference()
databaseRef.child("Items").queryOrdered(byChild: "Name").queryEqual(toValue: "Fadi").observeSingleEvent(of: .value, with: { (snapShot) in
if let snapDict = snapShot.value as? [String:AnyObject]{
for each in snapDict{
let key = each.key as! String
let name = each.value["Name"] as! String
print(key)
print(name)
}
}
}, withCancel: {(Err) in
print(Err.localizedDescription)
})