[FIXED] Check if the product exists in the shopping cart - Cakephp 3

Issue

Friends, I appreciate if anyone can analyze.

I add items to the shopping cart according to the code below.

    public function add()
    {

        $order = $this->Orders->newEntity();

        if ($this->request->is('post')) {

            $order = $this->Orders->patchEntity($order, $this->request->getData());
            $order->product = $this->Orders->Products->get($order->product_id, ['contain' => ['Users']]);
            $session = $this->request->getSession();
            $cart = $session->read('cart');
            $cart[] = $order;

            if (isset($cart[$order->product_id])) {
           //product is already in the cart
            } else {
            $cart[$order->product_id] = $order;
            }

           $product = $this->Orders->Products->find('list', ['limit' => 200]);
           $users = $this->Products->Users->find('list', ['limit' => 200]);
           $this->set(compact('order', 'products', 'users'));
       }
   }

I can add products to the normal cart, but I can't prevent the same product from being added multiple times. It needs to be only once.

Thanks for any comment!

Solution

Instead of this

if (isset($cart[$order->product_id])) {
    //product is already in the cart
} else {
    $cart[$order->product_id] = $order;
}

It should be something like this (as I don't have your full code)

 // counter is to check if the product_id already exists
       
$counter = 0;
foreach($cart as $cartOne){
    
    if($cartOne['product_id'] == $order->product_id){
        $cartOne['quantity'] += 1;
        $counter++;
    break;
    } 
}

if($counter == 0){
    $cart[$order->product_id] = $order;
}
$counter = 0;

Full Code Here:

public function add(){

    $order = $this->Orders->newEntity();

    if ($this->request->is('post')) {

        $order = $this->Orders->patchEntity($order, $this->request->getData());
        $order->product = $this->Orders->Products->get($order->product_id, ['contain' => ['Users']]);
        $session = $this->request->getSession();
        $cart = $session->read('cart');
        $cart[] = $order;

        // counter is to check if the product_id already exists
           
        $counter = 0;
        foreach($cart as $cartOne){
            
            if($cartOne['product_id'] == $order->product_id){
                $cartOne['quantity'] += 1;
                $counter++;
            break;
            } 
        }
        
        if($counter == 0){
            $cart[$order->product_id] = $order;
        }
        $counter = 0;

        $product = $this->Orders->Products->find('list', ['limit' => 200]);
        $users = $this->Products->Users->find('list', ['limit' => 200]);
        $this->set(compact('order', 'products', 'users'));
    }
}

Answered By - Chilarai