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How do I check if a Google Firebase Firestore document exists?

I've tried the following code in my project: 

let db = Firestore.firestore() let UserName = UserNameText.text print(UserName!) let userRef = db.collection("users").document(UserName!) print("one") userRef.getDocument { (document, error) in print("two") if let document = document { print("three") if document.exists{ print("Document data: \(String(describing: document.data()))") } else { print("Document does not exist") } } }

Here is a picture of my data on firebase.google.com: Click here

The print(UserName!) will return the correct value. The following code will output one and two but will stop there.

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  • Use if let document = document, document.exists {. Check out the example here: firebase.google.com/docs/firestore/query-data/… Commented Apr 9, 2018 at 22:13
  • If it does not print 3, then perhaps, you are returning an error. Print out the error variable also. Commented Apr 9, 2018 at 22:14

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@JRLtechwriting solved my problem.

"Use if let document = document, document.exists {. Check out the example here: https://firebase.google.com/docs/firestore/query-data/get-data#get_a_document"

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