Get Firestore subcollections

Question

I have a problem with getting data from the Firestore with a following structure:

Here is how I get category collection:

var defaultStore: Firestore?
var location: [DocumentSnapshot] = []

override func viewDidLoad() {
    super.viewDidLoad()
    defaultStore = Firestore.firestore()

    defaultStore?.collection("Category").getDocuments { (querySnapshot: QuerySnapshot?, error: Error?) in
        if let error = error {
            print(error.localizedDescription)
        } else {
            self.location = (querySnapshot?.documents)!
            DispatchQueue.main.async {
                self.tableView.reloadData()
            }
        }
    }
}

It gives me: Books, Films, From test and Serials. But how can I get collections from Films for example?

Solution

You can try

defaultStore?.collection("Category").document("Film").collection("firstFilm").getDocuments();

Because Films, Books etc are documents not collections as you can see. For more info read here Firestore data model

Comments

[Alexander]

also, we can use fhttps://firebaseopensource.com/projects/firebase/firebase-a‌​ndroid-sdk/docs/ktx/‌​firestore.md/

[EngineSense]

This is really hard when it's come to using random id, You cannot simply get the collection of it's subcollection in method like the above. You need to loop it get it. But at final hard to implement.