Firebase - atomic write of multiple values to multiple locations

Question

I need to register an object to Firebase. The object has multiple fields, and I need to write them all to multiple paths.

My code :

public func RegisterProductOnDatabase(database dataBase: DatabaseReference)
{
    // Run in one transaction
    RegisterProductOnDatabase(database: dataBase)
    RegisterProductForAllUsers(database: dataBase)
}

private func RegisterProductForAllUsers(database dataBase: DatabaseReference)
{
    dataBase.child("Products").child(self.UniqueID()).child("Name").setValue(self.Name())
    dataBase.child("Products").child(self.UniqueID()).child("UniqueID").setValue(self.UniqueID())
    dataBase.child("Products").child(self.UniqueID()).child("Price").setValue(self.Price())
    dataBase.child("Products").child(self.UniqueID()).child("Description").setValue(self.Description())
    dataBase.child("Products").child(self.UniqueID()).child("ToBuy?").setValue(self.m_ToBuy)
    dataBase.child("Products").child(self.UniqueID()).child("ToSell?").setValue(self.m_ToSell)
    dataBase.child("Products").child(self.UniqueID()).child("Owner").setValue(self.m_Owner)
    dataBase.child("Products").child(self.UniqueID()).child("Amount").setValue(self.m_Amount)
    dataBase.child("Products").child(self.UniqueID()).child("MainImage").setValue(self.m_PicturesURLs.first)
}

private func RegisterProductForAddingUser(database dataBase: DatabaseReference)
{        
    dataBase.child("Users").child(m_Owner).child("Products").child(self.UniqueID()).child("Name").setValue(self.Name())
    dataBase.child("Users").child(m_Owner).child("Products").child(self.UniqueID()).child("UniqueID").setValue(self.UniqueID())
    dataBase.child("Users").child(m_Owner).child("Products").child(self.UniqueID()).child("Price").setValue(self.Price())
    dataBase.child("Users").child(m_Owner).child("Products").child(self.UniqueID()).child("Description").setValue(self.Description())
    dataBase.child("Users").child(m_Owner).child("Products").child(self.UniqueID()).child("ToBuy?").setValue(self.m_ToBuy)
    dataBase.child("Users").child(m_Owner).child("Products").child(self.UniqueID()).child("ToSell?").setValue(self.m_ToSell)
    dataBase.child("Users").child(m_Owner).child("Products").child(self.UniqueID()).child("Amount").setValue(self.m_Amount)
    dataBase.child("Users").child(m_Owner).child("Products").child(self.UniqueID()).child("MainImage").setValue(self.m_PicturesURLs.first)
}

I need the function "RegisterProductOnDatabase" to run as one transaction - meaning all written values to be written as one transaction.

1) How can I write all this data as ONE transaction using Swift ? 2) Is there a better way to write all these values without code multiplication?

Answer 1

Firstly, you should use dictionaries instead of manually modifying each node.

This is from the Firebase documentation:

let key = ref.child("posts").childByAutoId().key
let post = ["uid": userID,
            "author": username,
            "title": title,
            "body": body]
let childUpdates = ["/posts/\(key)": post,
                    "/user-posts/\(userID)/\(key)/": post]
ref.updateChildValues(childUpdates)

Read more about writing data here.

Secondly, in order to modify in multiple locations, use this answer as I have recently had the same question.