Wrong read from Firebase - ios

Question

I am uploading a product to Firebase using this code :
let storageRef = Storage.storage().reference().child("ProductsImages").child(product.UniqueID()).child("MainImage.png")
if let mainChosenImage = self.selectedImageToUpload
{
if let uploadData = UIImageJPEGRepresentation(mainChosenImage, 0.2)
{
storageRef.putData(uploadData, metadata: nil)
{
(StorageMetaData, error) in
if error != nil
{
print(error)
return
}
self.mainImageURL = StorageMetaData?.downloadURL()?.absoluteString
if let urlString = self.mainImageURL
{
self.ref.child("Products").child(product.UniqueID()).child("MainImage").setValue(urlString)
self.ref.child("Users").child(user.uid).child("Products").child(product.UniqueID()).child("MainImage").setValue(urlString)
product.AddImageURLToProduct(URL: urlString)
}
}
}
}
product.RegisterProductForAllUsers(database: self.ref)
product.RegisterProductForAddingUser(database: self.ref)
self.performSegue(withIdentifier: "unwindToMyProductsViewController", sender: self)
Now I know that writing an image like this is async (1), but after item is added (Let's say we ignore picture for now), I have this in Firebase:
saved Firebase Product
But when I go back to my collectionView and load the information (It happens in the ViewDidLoad method), this is the information I read:
Product information read
This is my code for ViewDidLoad:
if let currentUserID = loggedOnUserID
{
// Retrieve the products and listen for changes
databaseHandle = ref?.child("Users").child(currentUserID).child("Products").observe(.childAdded, with:
{ (snapshot) in
// Code to execute when new product is added
let prodValue = snapshot.value as? NSDictionary
let prodName = prodValue?["Name"] as? String ?? ""
let prodPrice = prodValue?["Price"] as? Double ?? -1
let prodDesc = prodValue?["Description"] as? String ?? ""
let prodURLS = prodValue?["MainImage"] as? String ?? ""
let prodAmount = prodValue?["Amount"] as? Int ?? 0
let prodID = snapshot.key
let prodToAddToView = Product(name: prodName, price: prodPrice, currency: "NIS", description: prodDesc, location: "IL",
toSell: false, toBuy: false, owner: currentUserID, uniqueID: prodID, amount: prodAmount)
if (prodURLS != "")
{
prodToAddToView.AddImageURLToProduct(URL: prodURLS)
}
self.products.append(prodToAddToView)
DispatchQueue.main.async
{
self.MyProductsCollection.reloadData()
}
}
) // Closes observe function
Also - my code writing to Database :
public 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)
}
I am writing "Name" first, which is maybe the reason I only read name properly? Is there a way to make all these writings be atomic ?
with only 1 value for some reason. (2)
1) Any way to make it sync ?
2) How can I read the proper values ?