如何增加值時，按一下按鈕laravel 5.3

Question

使用laravel 5.3 IM和項目SHOOPING車 當我點擊的項目的數量沒有增加

產品控制研究

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'); 
} 

和模型車：

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; 

    } 

    } 

這是一個產品頁面：

<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> 

它應該添加項目和增量，但它只是顯示項目的id與增量它。

Answer 1

會話保存爲閃存數據。所以，只要您推送數據，您就需要保存會話。由於你沒有在你的代碼中做它總是得到一個新的第一個項目被添加到它的新車，我認爲你是混淆該號碼與ID，因爲totalQty將始終爲1.

所以請執行以下操作後將購物車對象放入會話中。

​​

Answer 2

你的意思是這個

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 
}