无法在 Django 中解压不可迭代的 ModelBase 对象

Question

我想在其 ID 的帮助下查看项目列表中的单个项目但无法实现我正在使用 cbv 它向我显示上述错误我正在创建一个电子商务网站我只想加载该项目他从所有项目中单击但无法实现的详细信息向我显示上述错误

我的models.py

class Item(models.Model):

    categories = models.ForeignKey(Categories, on_delete=models.CASCADE, related_name='our_items')
    subcategories = models.ForeignKey(Subcategories, on_delete=models.CASCADE, related_name='products')
    can_buy = models.ForeignKey(For, on_delete=models.CASCADE, related_name='for_wearing')
    name = models.CharField(max_length=200, blank=False)
    contain_size = models.CharField(max_length=50, blank=True)
    brand_name = models.CharField(max_length=100, blank=False, default='Bagh')
    first = models.ImageField(upload_to='items', blank=False)
    second = models.ImageField(upload_to='items', blank=False)
    third = models.ImageField(upload_to='items', blank=True)
    fourth = models.ImageField(upload_to='items', blank=True)
    fifth = models.ImageField(upload_to='items', blank=True)
    item_vedio = models.FileField(upload_to='item_vedio', blank=True)
    offered_price = models.FloatField(blank=False,)
    actual_price = models.FloatField(blank=False)
    about = models.TextField(blank=False, default="about" )
    offer = models.CharField(max_length=4, blank=True)
    
    def __str__(self):
        return self.name

这是我的 views.py

class Product_detail(View):
    def get(self, request, products_id):
        item = Item.objects.get(Item, pk=products_id)
        category_list = Categories.objects.all()
        print(item)
        return render (request, 'products.html',{"item_list" : item, 'category_list': category_list })

我的urls.py

path('<int:products_id>/details',Product_detail.as_view(),name='detail')

我的 href 标签

<a href="{% url 'products:detail' products.id %}">

如有任何建议，我们将不胜感激，谢谢您的宝贵时间

显示所有项目的 html 视图

class Product(View):
    def get(self, request, subcategory_id):
        subcategory = get_object_or_404(Subcategories, pk=subcategory_id)
        products = subcategory.products.all()
        category_list = Categories.objects.all()
        print(products)
        return render (request, 'products.html',{"subcategory_list" : products, 'category_list': category_list })

我猜你需要那个

添加products.html

<section class="col-10">
          {% for products in subcategory_list %}
          <a class="products" href="{% url 'products:detail' products_id %}">
          <div class="card col-4" style="width: 18rem; height:400px">
              <img class="img" src="{{ products.first.url }}" alt="" height="300px" width="100%" onmouseover="this.src='{{ products.second.url }}'"
              onmouseout="this.src='{{ products.first.url }}'" >
              <div class="detail">
              <h4 class="price">{{ products.offered_price|currency}}</h4>
              <h5>{{products.name}} <br> <span>{{ products.brand_name}}</span> </h5>
              <p class="rate">Rate: 4.5<i class="fas fa-star"></i></p>
              <h6>Size:<span> {{products.contain_size}}</span> </h6>
              </div>
            </div>
          </a>
            {% endfor %} 
          </div>  
        </section>

我的产品url

path('<int:subcategory_id>/products/',Product.as_view(),name='product'),

添加回溯

Environment:


Request Method: GET
Request URL: http://localhost:8000/1/details

Django Version: 3.2.5
Python Version: 3.8.5
Installed Applications:
['django.contrib.admin',
 'django.contrib.auth',
 'django.contrib.contenttypes',
 'django.contrib.sessions',
 'django.contrib.messages',
 'django.contrib.staticfiles',
 'crispy_forms',
 'accounts',
 'products']
Installed Middleware:
['django.middleware.security.SecurityMiddleware',
 'django.contrib.sessions.middleware.SessionMiddleware',
 'django.middleware.common.CommonMiddleware',
 'django.middleware.csrf.CsrfViewMiddleware',
 'django.contrib.auth.middleware.AuthenticationMiddleware',
 'django.contrib.messages.middleware.MessageMiddleware',
 'django.middleware.clickjacking.XFrameOptionsMiddleware']



Traceback (most recent call last):
  File "C:\Users\mithlesh\Desktop\coolbuy 2.0\lib\site-packages\django\core\handlers\exception.py", line 47, in inner
    response = get_response(request)
  File "C:\Users\mithlesh\Desktop\coolbuy 2.0\lib\site-packages\django\core\handlers\base.py", line 181, in _get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "C:\Users\mithlesh\Desktop\coolbuy 2.0\lib\site-packages\django\views\generic\base.py", line 70, in view
    return self.dispatch(request, *args, **kwargs)
  File "C:\Users\mithlesh\Desktop\coolbuy 2.0\lib\site-packages\django\views\generic\base.py", line 98, in dispatch
    return handler(request, *args, **kwargs)
  File "C:\Users\mithlesh\Desktop\coolbuy 2.0\coolbuy\products\views.py", line 29, in get
    item = Item.objects.get(Item, pk=item_id)
  File "C:\Users\mithlesh\Desktop\coolbuy 2.0\lib\site-packages\django\db\models\manager.py", line 85, in manager_method
    return getattr(self.get_queryset(), name)(*args, **kwargs)
  File "C:\Users\mithlesh\Desktop\coolbuy 2.0\lib\site-packages\django\db\models\query.py", line 424, in get
    clone = self._chain() if self.query.combinator else self.filter(*args, **kwargs)
  File "C:\Users\mithlesh\Desktop\coolbuy 2.0\lib\site-packages\django\db\models\query.py", line 941, in filter
    return self._filter_or_exclude(False, args, kwargs)
  File "C:\Users\mithlesh\Desktop\coolbuy 2.0\lib\site-packages\django\db\models\query.py", line 961, in _filter_or_exclude
    clone._filter_or_exclude_inplace(negate, args, kwargs)
  File "C:\Users\mithlesh\Desktop\coolbuy 2.0\lib\site-packages\django\db\models\query.py", line 968, in _filter_or_exclude_inplace
    self._query.add_q(Q(*args, **kwargs))
  File "C:\Users\mithlesh\Desktop\coolbuy 2.0\lib\site-packages\django\db\models\sql\query.py", line 1393, in add_q
    clause, _ = self._add_q(q_object, self.used_aliases)
  File "C:\Users\mithlesh\Desktop\coolbuy 2.0\lib\site-packages\django\db\models\sql\query.py", line 1412, in _add_q
    child_clause, needed_inner = self.build_filter(
  File "C:\Users\mithlesh\Desktop\coolbuy 2.0\lib\site-packages\django\db\models\sql\query.py", line 1283, in build_filter
    arg, value = filter_expr

Exception Type: TypeError at /1/details
Exception Value: cannot unpack non-iterable ModelBase object

Answer 1

您的网址 href 有问题

你可以这样试试：

<a href="{% url 'products:detail' products_id=products.id %}">

无法在 Django 中解压不可迭代的 ModelBase 对象

cannot unpack non-iterable ModelBase object in django

django

django-templates

django-models

django-views

django-class-based-views