在拉拉维尔的会话购物车中添加和更新产品

Question

我正在为在拉拉维尔进行会议的客人构建购物车。 我可以将一个带有数量的产品添加到会话变量"购物车"。但是，当我再次添加相同的产品时，我无法增加数量，因为我无法在数组中搜索相同的产品 ID。

控制器

public function addToSessionCart(Request $request, $id)
{
if (session()->has('cart')) {
$oldCart = session()->get('cart');
$cartdata = $oldCart;
if (array_key_exists('product_id', $cartdata)) {
if (in_array($id, $cartdata['product_id'], true)) {
$cartdata['quantity'] += 1;
} else {
$cartdata['product_id'] = $id;
$cartdata['quantity'] = 1;
}
}
} else {
$cartdata = [];
$cartdata['product_id'] = $id;
$cartdata['quantity'] = 1;
}
session()->put('cart', $cartdata);
session()->flash('message', 'Item added to cart !');
return back();
}

我正在将数据从我的应用程序服务提供商传递到购物车：

view()->composer('*', function ($view) {
if (Auth::check()) {
$cart_items = Cart::where('user_id', Auth::user()->id)->with('product')->get();
$cart_items_count = Cart::where('user_id', Auth::user()->id)->count();
$menus = Menu::where('status', '1')->orderBy('order', 'ASC')->get();
$view->with(['cart_items' => $cart_items, 'cart_items_count' => $cart_items_count, 'menus' => $menus]);
} else {
$cart_items = null;
$session_cart_items = null;
if (Session::get('cart')) {
$session_cart_items = [];
foreach (session('cart') as $session_cart_items[]) {
$session_cart_items['product'] = Product::where('id', session('cart.product_id'))->get();
$session_cart_items['quantity'] = session('cart.quantity');
}
}
$cart_items_count = count(Session::get('cart'));
$menus = Menu::where('status', '1')->orderBy('order', 'ASC')->get();
$view->with([
'cart_items' => $cart_items, 'cart_items_count' => $cart_items_count, 'menus' => $menus,
'session_cart_items' => $session_cart_items,
]);
}
}); 

视图

@foreach($session_cart_items['product'] as $key => $name)
<div class="product-cart">
<div class="product-image">
<img src="/frontend/assets/images/{{ $name->image }}" alt="image">
</div>
<div class="product-content">
<h3><a href="/product/{{$name->id}}/{{$name->slug}}">{{$name->name}}</a></h3>
<div class="product-price">
<span>{{ $session_cart_items['quantity'] }}</span>
<span>x</span>
&#8377; <span class="price">{{ $name->price }}</span>
</div>
</div>
</div>
@php
$total += ($name->price * $session_cart_items['quantity']);
@endphp
@endforeach

我希望在将同一产品添加到购物车时增加数量。如果没有，请将新的产品 ID 和数量添加到会话数组。

Answer 1

此行需要更改：

foreach (session('cart') as $session_cart_items[]) {

不能使用[]进行读取。

foreach (session('cart') as $session_cart_items) {