How to store custom object in Firebase with Swift? - swift

Question

I'm porting an android app and using firebase in android it is possible to save a format in this way.
How can i do this on Swift? I read that i can store only this kind of data
NSString
NSNumber
NSDictionary
NSArray
How can I store the obj in atomic operation?
It's correct to store every field of the user object in separate action?
Firebase on Android
mDatabaseReferences.child("users").child(user.getUuid()).setValue(user)

Answer 1

I generally store objects as dictionaries on firebase. If, within my application, I have a User object, and it has properties as such:
class User {
var username = ""
var email = ""
var userID = ""
var consecutiveDaysLoggedOn = Int()
}
let newUser = User()
newUser.username = "LeviYoder"
newUser.email = "LeviYoder#LeviYoder.com"
newUser.userID = "L735F802847A-"
newUser.consecutiveDaysLoggedOn = 1
I would just store those properties as a dictionary, and write that dictionary to my firebase database:
let userInfoDictionary = ["username" : newUser.username
"email" : newUser.email
"userID" : newUser.userID
"consecutiveDaysLoggedOn" : newUser.consecutiveDaysLoggedOn]
let ref = Database.database().reference.child("UserInfo").child("SpecificUserFolder")
// ref.setValue(userInfoDictionary) { (error:Error?, ref:DatabaseReference) in
ref.setValue(userInfoDictionary, withCompletionBlock: { err, ref in
if let error = err {
print("userInfoDictionary was not saved: \(error.localizedDescription)")
} else {
print("userInfoDictionary saved successfully!")
}
}
Does that address your question?

Answer 2

I come with a little extension used to convert a standard SwiftObject in readable dictionnary for FireStore:
extension Encodable {
var toDictionnary: [String : Any]? {
guard let data = try? JSONEncoder().encode(self) else {
return nil
}
return try? JSONSerialization.jsonObject(with: data, options: .allowFragments) as? [String: Any]
}
}
For example, in my model:
struct Order: Encodable {
let symbol: String
let shares: Int
let price: Float
let userID: String
}
Called with this line:
let dictionnary = order.toDictionnary
This is the kind of dictionary generated
4 elements
▿ 0 : 2 elements
- key : "symbol"
- value : FP.PAR
▿ 1 : 2 elements
- key : "shares"
- value : 10
▿ 2 : 2 elements
- key : "userID"
- value : fake_id
▿ 3 : 2 elements
- key : "price"
- value : 100

Answer 3

Use
self.ref.child("users").child(user.uid).setValue(["username": username])