看，ManyToManyField不能与相关模型建立反向关系，因为python是解释语言，所以它不能读取前一个模型的模型类。相反，你可以做一件事...

# models.py

class Item(models.Model):
    item_name = models.CharField(max_length=255, default="")

    def __str__(self):
        return self.item_name

class Category(models.Model):
    category_name = models.CharField(max_length=255, default="")
    items = models.ManyToManyField(Item)

    def __str__(self):
        return self.category_name

之后，您可以在www.example.com文件中列出您的要求views.py。

# views.py

def get_items_by_categories(request):
    
    # Here, you will receive a set of items ...
    
    get_categories = Category.objects.all()

    # Filter out items with respect to categories ...

    get_items_list = [{"category": each.category_name, "items": each.items} for each in get_categories]

    return render(request, "categories.html", {"data": get_items_list})

使用categories.html文件中的类别迭代项目。

{% for each in data %}
    {% for content in each %}
        {{content.category}}
        {% for item in content.items.all %}
            {{item.item_name}}
        {% endfor %}
    {% endfor %}
{% endfor %}

我希望这个解决方案能帮助你..
谢谢您！