retrieve values from firestore's struct in swift - ios

Question

I'm querying some data from my firestore,and I put it in my Usersdata,
but I dont know how to get my values from Usersdata.
Please help me to query my data!
This is my struct base on Firestroe example
struct Usersdata {
let uid:String?
let facebook:String?
let google:String?
let name:String?
let age:Int?
let birthday:String?
let smokeage:Int?
let smokeaddiction:Int?
let smokebrand:String?
let gold:Int?
let score:Int?
let fish:Int?
let shit:Int?
let userimage:String?
init?(dictionary: [String: Any]) {
guard let uid = dictionary["uid"] as? String else { return nil }
self.uid = uid
self.facebook = dictionary["facebook"] as? String
self.google = dictionary["google"] as? String
self.name = dictionary["name"] as? String
self.age = dictionary["age"] as? Int
self.birthday = dictionary["birthday"] as? String
self.smokeage = dictionary["smokeage"] as? Int
self.smokeaddiction = dictionary["smokeaddiction"] as? Int
self.smokebrand = dictionary["smokebrand"] as? String
self.gold = dictionary["gold"] as? Int
self.score = dictionary["score"] as? Int
self.fish = dictionary["fish"] as? Int
self.shit = dictionary["shit"] as? Int
self.userimage = dictionary["userimage"] as? String
}
}
this is my function to query data from firebase
func test(schema:String , collection:String , document : String){
let queryRef = db.collection("Users").document(userID).collection(collection).document(document)
queryRef.getDocument { (document, error) in
if let user = document.flatMap({
$0.data().flatMap({ (data) in
return Usersdata(dictionary: data)
})
}) {
print("Success \(user)")
} else {
print("Document does not exist")
}
}
}

Answer 1

I think you are asking how to work with a structure with Firebase data. Here's a solution that will read in a known user, populate a structure with that data and then print the uid and name.
Assume a stucture
Users
uid_0
name: "Henry"
and then a structure to hold that data
struct Usersdata {
let uid:String?
let user_name:String?
init(aDoc: DocumentSnapshot) {
self.uid = aDoc.documentID
self.user_name = aDoc.get("name") as? String ?? ""
}
}
and a function to read that user, populate the struct and print out data from the struct
func readAUser() {
let docRef = self.db.collection("Users").document("uid_0")
docRef.getDocument { (document, error) in
if let document = document, document.exists {
let aUser = Usersdata(aDoc: document)
print(aUser.uid, aUser.user_name)
} else {
print("Document does not exist")
}
}
}
and the output
uid_0 Henry