如何增加值时，按一下按钮laravel 5.3

Question

使用laravel 5.3 IM和项目SHOOPING车 当我点击的项目的数量没有增加

产品控制研究

public function getAddToCart(Request $request, $id) 
{ 
    $product =Product::find($id); 
    $oldcart = Session::has('cart') ? Session::get('cart') : null; 
    $cart = new Cart($oldcart); 
    $cart->add($product , $product->id); 

    $request->session()->put('cart',$cart); 
// TO show it dd($request->Session()->get('cart')); 
    return redirect()->route('product.index'); 
} 

和模型车：

class Cart 
{ 
public $items = null; 
public $totalQty = 0; 
public $totalPrice = 0; 

public function __consruct($oldCart){ 
    if($oldCart){ 
    $this->$items = $oldCart->items; 
    $this->$totalQty = $oldCart->totalQty; 
    $this ->$totalPrice = $oldCart->totalPrice; 
    } 

} 
    public function add($item,$id){ 
    $storedItem = ['qty' => 0,'price' => $item->price,'item' => $item]; 
    if ($this->items) 
    { 
     if(arrary_Key_exists($id,$this->items)) 
     { 
     $storedItem = $this->items[$id]; 
     } 
    } 
     $storedItem['qty']++; 
     $storedItem['price'] = $item->price * $storedItem['qty']; 
     $this->items[$id] = $storedItem; 
     $this->totalQty++; 
     $this->totalPrice += $item->price; 

    } 

    } 

这是一个产品页面：

<a href="#"> <i class="fa fa-shopping-cart" aria-hidden="true"></i> Shopping Cart 
     <span class="badge">{{ Session::has('cart') ? Session::get('cart')->totalQty : '' }}</span> 
     </a> 

它应该添加项目和增量，但它只是显示项目的id与增量它。

Answer 1

会话保存为闪存数据。所以，只要您推送数据，您就需要保存会话。由于你没有在你的代码中做它总是得到一个新的第一个项目被添加到它的新车，我认为你是混淆该号码与ID，因为totalQty将始终为1.

所以请执行以下操作后将购物车对象放入会话中。

​​

Answer 2

你的意思是这个

array:4 [▼ 
"_token" => "NaciZTnMzNzqB02Nvr7RtXJj7c5NtsUF339522l2" 
"_previous" => array:1 [▼ 
    "url" => "http://localhost:8000" 
    ] 
    "_flash" => array:2 [▼ 
"old" => [] 
"new" => [] 
] 

Cart {#163 ▼ 
+items: array:1 [▼ 
1 => array:3 [▼ 
    "qty" => 1 
    "price" => 20 
    "item" => Product {#172 ▼ 
    #fillable: array:4 [▼ 
     0 => "imgaePath" 
     1 => "title" 
     2 => "description" 
     3 => "price" 
    ] 
    #connection: null 
    #table: null 
    #primaryKey: "id" 
    #keyType: "int" 
    #perPage: 15 
    +incrementing: true 
    +timestamps: true 
    #attributes: array:7 [▼ 
     "id" => 1 
     "created_at" => null 
     "updated_at" => null 
     "imagePath" => "http://www.abebooks.com/images/books/harry-potter/deathly-hallows.jpg" 
     "title" => "hurry potter" 
     "description" => "the best book ever" 
     "price" => 20 
    ] 
    #original: array:7 [▼ 
     "id" => 1 
     "created_at" => null 
     "updated_at" => null 
     "imagePath" => "http://www.abebooks.com/images/books/harry-potter/deathly-hallows.jpg" 
     "title" => "hurry potter" 
     "description" => "the best book ever" 
     "price" => 20 
    ] 
    #relations: [] 
    #hidden: [] 
    #visible: [] 
    #appends: [] 
    #guarded: array:1 [▼ 
     0 => "*" 
    ] 
    #dates: [] 
    #dateFormat: null 
    #casts: [] 
    #touches: [] 
    #observables: [] 
    #with: [] 
    +exists: true 
    +wasRecentlyCreated: false 
    } 
] 
] 
+totalQty: 1 
+totalPrice: 20 
}