第二屆ENGINE沒有到期日

我有Product型號：

class Product(models.Model):
    title = models.CharField(max_length = 25)
    description = models.TextField(blank = True, null = True)
    price = models.IntegerField(default = 0)

    image = models.ImageField(upload_to = 'products/images', null = True, blank = True)
    image_url = models.URLField(null = True, blank = True)

    created_at = models.DateTimeField(auto_now_add = True)
    updated_at = models.DateTimeField(auto_now = True)

    product_views = models.IntegerField(default = 0)

    def __str__(self):
        return self.title

    class Meta:
        ordering = ['title']

在每個用戶視圖中，我向product_views. views.py：

def product_detail_view(request, id):
    if 'views' not in request.session:
        request.session['views'] = []
    arr = request.session['views']

    # obj = Product.objects.get(id = id)
    obj = get_object_or_404(Product, id = id)
    if id not in arr:
        arr.append(id)
        request.session['views'] = arr
        obj.product_views = obj.product_views   1
        obj.save()

    context = {
        'object': obj,
    }
    return render(request, 'home/detail.html', context)

我設定SESSION_COOKIE_AGE = 86400了settings.py。它作業得很好。但是有一個問題。在我的應用程式中，用戶可以登錄，一天后，他必須再次登錄。我想在Remember me我的登錄中添加復選框，但這里有問題。我無法為特定密鑰設定特定的過期時間。所以我必須制作自己的第二個會話引擎。我是這樣寫的：

class ProductViews(models.Model):
    product = models.ForeignKey(Product, on_delete = models.CASCADE, related_name = 'views', null = True, blank = True)
    viewer = models.CharField(max_length = 36, null=True, blank=True) # Here, I can take IP if viewer isn't logged in
    user = models.ForeignKey(User, on_delete = models.CASCADE, related_name = 'viewed_products', null = True, blank = True)
    datetime = models.DateTimeField(default = django.utils.timezone.now)

我可以通過以下方式檢查到期時間：

    dateta = product_v.datetime

    time_now = datetime.datetime.now(dateta.tzinfo)  # current time
    time_now = time_now - timedelta(days = 1)
    if dateta < time_now:  # check if stored time exceeds 1 day
        product_v.delete(keep_parents = True)

我想設定SESSION_COOKIE_AGE為 1 個月，但它會影響product_views. 1天后不能數，1個月后會數，那不行。我不知道，它會像默認的 DB Session Engine 那樣作業。你有什么想法嗎？我將不勝感激任何幫助。

uj5u.com熱心網友回復：

我找到了解決方案。不需要制作2nd Session Engine，因為這會花費很多時間，而且到時候編輯起來會很困難。這是一個更簡單的方法：在middleware.py我輸入：

class ViewsMiddleware:
    def __init__(self, get_response):
        self.get_response = get_response
        # One-time configuration and initialization.

    def __call__(self, request):
        check_view(request)

        response = self.get_response(request)

        # Code to be executed for each request/response after
        # the view is called.

        return response


def check_view(request):
    now = datetime.datetime.today()
    print(request.session['viewed'])
    print(request.session['views'])
    if 'viewed' not in request.session or request.session['viewed'] != now.day:
        request.session['viewed'] = now.day
        request.session['views'] = []

        obj, created = SiteView.objects.get_or_create(
                current = f'{now.year} {now.month} {now.day}',
                defaults = {'current': f'{now.year} {now.month} {now.day}', 'views': 1}
        )
        if not created:
            obj.views  = 1
            obj.save()

并且在details_view（查看產品時）：

def detail_view(request, id):
    obj = get_object_or_404(Product, pub_id = id)
    if 'views' not in request.session:
        request.session['views'] = []
    arr = request.session['views']
    if id not in arr:
        arr.append(id)
        request.session['views'] = arr
        obj.product_views = obj.product_views   1
        obj.save()

    context = {
        'title' : obj.title,
        'object': obj,
    }
    return render(request, 'shop/products/detail.html', context)

我希望，你會的。

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