How do I loop all Firebase children at once in the same loop?

Question

I have three nodes in firebase that I would like to loop through using the same loop. I\'m successfully able to loop through a single node (cookies) using this code:

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Answer 1

You can convert snapshot to dict and loop through the dict:

databaseRef.child("cookies").observeSingleEvent(of: .value, with: { snapshot in
    if let dict = snapshot.value as? Dictionary<String, Dictionary<String, Any>> {
        for (key, value) in dict {
            if let recipeHeader = value["recipeHeaderFirebase"] as? String, favoriteArray.contains(key) {
                self.numberOfRecipes.append(recipeHeader)
             ...
            }
        }
    }
}

or you can use the enumerator:

databaseRef.child("cookies").observeSingleEvent(of: .value, with: { snapshot in
    let enumerator = snapshot.children
    while let (key, value) = enumerator.nextObject() as? FIRDataSnapshot {
        if let recipeHeader = value["recipeHeaderFirebase"] as? String, favoriteArray.contains(key) {
            self.numberOfRecipes.append(recipeHeader)
            ...
        }
    }
}

Answer 2

The following code prints all three levels of snapshots. I hope this will help:

self.databaseRef.child("cookies").observeSingleEvent(of: .value, with: { (cookiesSnapshot) in
    print("cookies snapshot: \(cookiesSnapshot)")

    self.databaseRef.child("dessert").observeSingleEvent(of: .value, with: { (dessertSnapshot) in 
        print("dessert snapshot: \(dessertSnapshot)")

        self.databaseRef.child("breakfast").observeSingleEvent(of: .value, with: { (breakfastSnapshot) in
            print("breakfast snapshot: \(breakfastSnapshot)")
        })
    })
})

I can't check this, so I hope all the } and ) are at the right place. :)