问题描述

我在 Heroku 上有一个应用程序，但后来我删除了我的 Heroku 应用程序（免费版，因此不活动的速度变慢）以提高速度。但现在我一个又一个错误。那些“只是”KeyError，所以它是可行的，但我的解决方案似乎以某种方式失败了，我不明白。我在这里得到了这一行：

val_b = our_total[city_data[1]][i] if our_total[city_data[1]][i] is not None else 0

导致 KeyError。我真的不明白，它只是在某些城市给出了这些错误。我觉得这很令人沮丧，因为它在我将它重新部署到新应用程序之前就可以工作了。有人能发现我做错了什么吗？

我尝试做类似的事情

try:
    val_b = our_total[city_data[1]][i] if our_total[city_data[1]][i] is not None else 0
except KeyError:
    continue

然后它不会显示一些我知道我的数据库中有城市数据的城市。

参考：

views.py

class InventoryStatusView(LoginrequiredMixin,View):
    template_name = "lager-status.html"
    cinnamon_form = CinnamonForm(prefix="cinnamon_form")
    peber_form = PeberForm(prefix="peber_form")
    pc_model = InventoryStatus.objects.all()
    product_model = Product.objects.all()
    order_item_model = WCOrderItem.objects.all()
    shipment_model = WCOrderShipment.objects.all()

    def get_method_title(self,shipment):
        city_values = dict(InventoryStatus.CITIES).values()
        city_values = dict(InventoryStatus.CITIES).values()

        # Get the inventory the order is picked from based on shipment method title
        title = shipment.method_title.replace("Hent-selv","").strip()

        if title not in city_values:
            title = "Hovedlager"
        return title

    def get(self,request):

        # Get total added to each city
        city_sum_added = self.pc_model.values('city').annotate(Sum('cinnamon'),Sum('peber'))

        print(f'city_sum_added: {city_sum_added}')

        # Get the amount of kilo attached to products
        queryset = ProductSpy.objects.select_related('product').values('product__product_id','kilo')
        product_data = {i['product__product_id']: i['kilo'] for i in queryset}

        shipments = self.shipment_model.prefetch_related(
            'order__itemOrder__product',)
        shipments = shipments.select_related('order')

        our_total = {}
        for shipment in shipments:
            method_title = self.get_method_title(shipment)

            for item in shipment.order.itemOrder.all():
                product = item.product

                # Check if we deal with kanel or peber as a product based on slug
                index = 0
                if product.slug.startswith("kanel-"):
                    index = 0
                elif product.slug.startswith("peber-"):
                    index = 1

                # do calculations
                k = product_data.get(product.id)
                if k:
                    kilos = item.quantity * k
                else:
                    continue

                if method_title not in our_total:
                    our_total[method_title] = [0,0]
                our_total[method_title][index] += kilos
        # Start of the part with the error
        c = dict()
        for city_data in InventoryStatus.CITIES:
            values_to_find = ["cinnamon__sum","peber__sum"]

            sums = dict()
            for i,value_to_find in enumerate(values_to_find):
                val_a = None
                val_b = None

                for elem_a in city_sum_added:
                    if elem_a["city"] == city_data[0]:
                        val_a = elem_a[value_to_find] if elem_a[value_to_find] is not None else 0
                        break

                val_b = our_total[city_data[1]][i] if our_total[city_data[1]][i] is not None else 0
                sums[value_to_find] = val_a - val_b

            c[city_data[1]] = sums
        print(c)
        # End the part with the error

        context = {
            "cinnamon_form": self.cinnamon_form,"peber_form": self.peber_form,"objects": objects,"deleted_objects": deleted_objects,"total_cinnamon": total_cinnamon,"total_peber": total_peber,"our_total": our_total,"c": c,}
        return render(request,self.template_name,context)

models.py

class InventoryStatus(models.Model):
    CITIES = [
        ('9800','Hjørring'),('9000','Ålborg'),('7500','Holstebro'),('8000','Århus'),('6700','Esbjerg'),('6230','Rødekro'),('5220','Odense'),('2300','København'),('4682','Hovedlager'),]

    cinnamon = models.DecimalField(max_digits=10,decimal_places=2,null=True,blank=True)
    peber = models.DecimalField(max_digits=10,blank=True)
    city = models.CharField(max_length=4,choices=CITIES)
    created_at = models.DateTimeField(auto_Now_add=True)
    created_by = models.ForeignKey(settings.AUTH_USER_MODEL,on_delete=models.CASCADE)
    is_deleted = models.BooleanField(default=False)

    def __str__(self):
        return self.city

引用

Environment:


Request Method: GET
Request URL: http://127.0.0.1:8000/inventory-status/

Django Version: 3.2.3
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','woocommerce','crispy_forms','el_pagination','rest_framework','django.contrib.postgres','import_export','accounts','dashboard','wpwoocommerce','clients']
Installed Middleware:
['django.middleware.security.SecurityMiddleware','whitenoise.middleware.WhiteNoiseMiddleware','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 "/Users/x/PycharmProjects/lager/venv/lib/python3.8/site-packages/django/core/handlers/exception.py",line 47,in inner
    response = get_response(request)
  File "/Users/x/PycharmProjects/lager/venv/lib/python3.8/site-packages/django/core/handlers/base.py",line 181,in _get_response
    response = wrapped_callback(request,*callback_args,**callback_kwargs)
  File "/Users/x/PycharmProjects/lager/venv/lib/python3.8/site-packages/django/views/generic/base.py",line 70,in view
    return self.dispatch(request,*args,**kwargs)
  File "/Users/x/PycharmProjects/lager/venv/lib/python3.8/site-packages/django/contrib/auth/mixins.py",line 71,in dispatch
    return super().dispatch(request,**kwargs)
  File "/Users/x/PycharmProjects/lager/venv/lib/python3.8/site-packages/django/views/generic/base.py",line 98,in dispatch
    return handler(request,**kwargs)
  File "/Users/x/PycharmProjects/lager/dashboard/views.py",line 264,in get
    val_b = our_total[city_data[1]][i] if our_total[city_data[1]][i] is not None else 0

Exception Type: KeyError at /inventory-status/
Exception Value: 'Ålborg'

解决方法

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django django django-3.2 keyerror python python-3.x

Django KeyError - 如何处理

问题描述

views.py

models.py

引用

解决方法