Django 为什么这种情况不起作用如果在模板中

我试着开一个条件，如果选择的产品种类。我试图在模板中规定一个条件

if

。但我做错了什么。请帮帮我

视图.py

def product_list(request, category=None, subcategory=None, kind=None):
    if category:
        categories = Category.objects.all()
        category = Category.objects.get(slug=category)
        subcategories = Subcategory.objects.filter(category=category)
        products = Product.objects.filter(category=category, available=True)
        products_quantity = len(Product.objects.filter(category=category, available=True))

        kinds = None
        if subcategory:
            subcategory = Subcategory.objects.get(slug=subcategory)
            kinds = Kind.objects.filter(kind=subcategory)
            products = Product.objects.filter(category=category, subcategory=subcategory, available=True)

            if kind:
                kind = Kind.objects.filter(slug=kind)
                products = Product.objects.filter(category=category, subcategory=subcategory, kind__in=kind, available=True)

        if products:
            paginator = Paginator(products, 8)
            page = request.GET.get('page')
            products = paginator.get_page(page)

        context = {
            'categories':categories,
            'category':category,
            'subcategories':subcategories,
            'subcategory':subcategory,
            'products':products,
            'products_quantity':products_quantity,
            'kinds':kinds
        }

        return render(request, 'shop/product/product_list.html', context)

产品列表.html

# Not works
{% if kind %}
    Hello
{% endif %}

但如果我开了这样一个条件。这工作做得很好

{% if category %}
    Hello
{% endif %}

或者试试这个。但效果不一样

{% if category and subcategory and kind %}
    Hello
{% endif %}

---

我如何为实物设定条件？谢谢

替换您的if语句

{% if kind %}
Hello
{% endif %}

与

---

在您的上下文词典中，您声明的键值名称为种类，但在if语句中，您使用的是种类

谢谢！有时我也会面对这种疯狂的错误

{% if kinds %}
Hello
{% endif %}