Firebase/Firestore: Value of type 'DocumentReference' has no member 'get'

Question

I am trying to access a document and get value from the fields so I can login as a user and retrieve that user data. I have the following code that will not compile because I keep getting the error 'Value of type 'DocumentReference' has no member 'get'. Please help!

question from:https://stackoverflow.com/questions/65929339/firebase-firestore-value-of-type-documentreference-has-no-member-get

Answer 1

Your newDoc is a DocumentReference object, which is nothing more than a reference to a (potential) document in the database.

To load the document from the database you need to call getdocument() on the reference, as shown in this snippet from the documentation:

let docRef = db.collection("cities").document("SF")

docRef.getDocument { (document, error) in
    if let document = document, document.exists {
        let dataDescription = document.data().map(String.init(describing:)) ?? "nil"
        print("Document data: (dataDescription)")
    } else {
        print("Document does not exist")
    }
}

The data is only available within the completion handler, as shown above. Trying to access it outside of there will lead to timing problems, as the data is loaded asynchronously.