Multiple collections in an array (session variable) — Property does not exist - arrays

Question

I'am trying to fetch a session variable if the user is a guest. The variable is called "cart" and is set like this:
$product = new Collection((object) [
'product_id' => $request->pId,
'amount' => $request->amount,
'variations' => $variations
]);
Session::push('cart', $product);
Then I later fetch it:
if(Auth::check()){
$cartProducts = ShoppingCartItem::where('user_id', '=', Auth::user()->id)->get();
}else{
$cartProducts = Session::get('cart');
}
foreach($cartProducts as $product){
dd($product);
$totalAmount += $product->amount;
$totalPrice += (PriceHelper::getProductPrice($product->product->id, $product->amount));
}
The problem here is that dd($product) still outputs an array (the session variable array I assume) which means that for example $product->amount does not exist.
This is the output from dd($product):

Answer 1

You can either access the values using get():
foreach ($cartProducts as $product) {
$totalAmount += $product->get('amount');
$totalPrice += PriceHelper::getProductPrice($product->get('product_id'), $product->get('amount'));
}
or as an array:
foreach ($cartProducts as $product) {
$totalAmount += $product['amount'];
$totalPrice += PriceHelper::getProductPrice($product['product_id'], $product['amount']);
}
or you could use sum() on the collection instead of using foreach:
$cartProducts = collect(Session::get('cart'));
$totalAmount = $cartProducts->sum('amount');
$totalPrice = $cartProducts->sum(function ($product) {
return PriceHelper::getProductPrice($product['product_id'], $product['amount']);
});
Edit
For a quick fix if you need $product to be an object you could do something like:
$cartProducts = collect(Session::get('cart'))->map(function ($item) {
return (object)$item->toArray();
});
Hope this helps!