1. 後端接口設計

請求方式 ： PUT /cart/selection/

請求參數： JSON 或 表單

返回數據：JSON

2. 後端實現

在carts/serializers.py中新建序列化器

class CartSelectAllSerializer(serializers.Serializer):
    """
    購物車全選
    """
    selected = serializers.BooleanField(label=‘全選‘)
 

在carts/views.py中新建視圖

class CartSelectAllView(APIView):
    """
    購物車全選
    """
    def perform_authentication(self, request):
        """
        重寫父類的用戶驗證方法，不在進入視圖前就檢查JWT
        """
        pass

    def put(self, request):
        serializer = CartSelectAllSerializer(data=request.data)
        serializer.is_valid(raise_exception=True)
        selected = serializer.validated_data[‘selected‘]

        try:
            user = request.user
        except Exception:
            # 驗證失敗，用戶未登錄
            user = None

        if user is not None and user.is_authenticated:
            # 用戶已登錄，在redis中保存
            redis_conn = get_redis_connection(‘cart‘)
            cart = redis_conn.hgetall(‘cart_%s‘ % user.id)
            sku_id_list = cart.keys()

            if selected:
                # 全選
                redis_conn.sadd(‘cart_selected_%s‘ % user.id, *sku_id_list)
            else:
                # 取消全選
                redis_conn.srem(‘cart_selected_%s‘ % user.id, *sku_id_list)
            return Response({‘message‘: ‘OK‘})
        else:
            # cookie
            cart = request.COOKIES.get(‘cart‘)

            response = Response({‘message‘: ‘OK‘})

            if cart is not None:
                cart = pickle.loads(base64.b64decode(cart.encode()))
                for sku_id in cart:
                    cart[sku_id][‘selected‘] = selected
                cookie_cart = base64.b64encode(pickle.dumps(cart)).decode()
                # 設置購物車的cookie
                # 需要設置有效期，否則是臨時cookie
                response.set_cookie(‘cart‘, cookie_cart, max_age=constants.CART_COOKIE_EXPIRES)

            return response
 

購物車全選