Swift - Firestore 自动创建集合/文档

Question

Is there a way to create a collection or document automatically?

In my case I already have a collection ("users") and in it are all of the the users. What I would like to achieve is if the user clicks on a button several subcollections and also an empty document should be created.

I tried this but is failing:

func insertWish(){
    let db = Firestore.firestore()
    let userID = Auth.auth().currentUser!.uid
    db.collection("users").document(userID).collection("wishlists").document("Main Wishlist").collection("Wünsche").document("Laptop").setData(["": ""]) { (error) in
        if error != nil {
            print("error")
        }
    }
}

These collections/document do not exist in my database and should only be created if the user clicks the button:

collection("wishlists").document("Main Wishlist").collection("Wünsche").document("Laptop")

Answer 1

The error message "The property.name is the empty string" is telling you that you're trying to add an invalid document:

setData(["": ""])

A field name of empty string is not valid. Give it a name that conforms to the requirements in the documentation .