Python 没有与给定查询匹配的部分

我是django的begginer。我有一个错误问题：

没有与给定查询匹配的部分

视图。py:

from description.models import Part
from django.core.paginator import EmptyPage, PageNotAnInteger, Paginator
from django.shortcuts import render_to_response, get_object_or_404

def PartyNumView(request, pk=None, page_number = 1):
    all_parties = Part.objects.all()
    current_page = Paginator(all_parties, 10)
    try:
        context = current_page.page(page_number)
    except PageNotAnInteger:
        context = current_page.page(1)
    except EmptyPage:
        context = current_page.page(current_page.num_pages)
    onePart = get_object_or_404(Part, pk = pk)
    return render_to_response('part_list.html', {'PartyNum': context, 'onePart': onePart})

urlpatterns = [
    url(r'^admin/', admin.site.urls),
    url(r'^parties/(\d+)/$', PartyNumView),
    url(r'^parties', PartyNumView),
    url(r'parties/(?P<pk>[\d]+)$', PartyNumView, name='onePart'),
    url(r'^main/', TemplateView.as_view(template_name='main.html')),       #static html
    url(r'^measures/', TemplateView.as_view(template_name='IcDesc.html')),       #static html

]

 {% for object in PartyNum %}

<tr>
  <td>{{ forloop.counter }}</td>
  <td><a href="{% url 'onePart' pk = object.pk %}"> {{ object.Party_number }}</a></td>
  <td>{{ object.Film }}</td>
  <td>{{ object.Thick }}</td>
  <td>{{ object.Critical_temperature }}</td>
  <td>{{ object.R_s }}</td>

 {% endfor %}

url.py:

from description.models import Part
from django.core.paginator import EmptyPage, PageNotAnInteger, Paginator
from django.shortcuts import render_to_response, get_object_or_404

def PartyNumView(request, pk=None, page_number = 1):
    all_parties = Part.objects.all()
    current_page = Paginator(all_parties, 10)
    try:
        context = current_page.page(page_number)
    except PageNotAnInteger:
        context = current_page.page(1)
    except EmptyPage:
        context = current_page.page(current_page.num_pages)
    onePart = get_object_or_404(Part, pk = pk)
    return render_to_response('part_list.html', {'PartyNum': context, 'onePart': onePart})

urlpatterns = [
    url(r'^admin/', admin.site.urls),
    url(r'^parties/(\d+)/$', PartyNumView),
    url(r'^parties', PartyNumView),
    url(r'parties/(?P<pk>[\d]+)$', PartyNumView, name='onePart'),
    url(r'^main/', TemplateView.as_view(template_name='main.html')),       #static html
    url(r'^measures/', TemplateView.as_view(template_name='IcDesc.html')),       #static html

]

 {% for object in PartyNum %}

<tr>
  <td>{{ forloop.counter }}</td>
  <td><a href="{% url 'onePart' pk = object.pk %}"> {{ object.Party_number }}</a></td>
  <td>{{ object.Film }}</td>
  <td>{{ object.Thick }}</td>
  <td>{{ object.Critical_temperature }}</td>
  <td>{{ object.R_s }}</td>

 {% endfor %}

urlpatterns=[
url（r“^admin/”，admin.site.url），
url（r“^parties/（\d+/$”，PartyNumView），
url（r'^parties'，PartyNumView），
url（r'parties/（？P[\d]+）$”，PartyNumView，name='onePart'），
url（r“^main/”，TemplateView.as_view（template_name='main.html'），#静态html
url（r“^measures/”，TemplateView.as_view（template_name='IcDesc.html'）），#静态html
]

还有一点part\u list.html:

from description.models import Part
from django.core.paginator import EmptyPage, PageNotAnInteger, Paginator
from django.shortcuts import render_to_response, get_object_or_404

def PartyNumView(request, pk=None, page_number = 1):
    all_parties = Part.objects.all()
    current_page = Paginator(all_parties, 10)
    try:
        context = current_page.page(page_number)
    except PageNotAnInteger:
        context = current_page.page(1)
    except EmptyPage:
        context = current_page.page(current_page.num_pages)
    onePart = get_object_or_404(Part, pk = pk)
    return render_to_response('part_list.html', {'PartyNum': context, 'onePart': onePart})

urlpatterns = [
    url(r'^admin/', admin.site.urls),
    url(r'^parties/(\d+)/$', PartyNumView),
    url(r'^parties', PartyNumView),
    url(r'parties/(?P<pk>[\d]+)$', PartyNumView, name='onePart'),
    url(r'^main/', TemplateView.as_view(template_name='main.html')),       #static html
    url(r'^measures/', TemplateView.as_view(template_name='IcDesc.html')),       #static html

]

 {% for object in PartyNum %}

<tr>
  <td>{{ forloop.counter }}</td>
  <td><a href="{% url 'onePart' pk = object.pk %}"> {{ object.Party_number }}</a></td>
  <td>{{ object.Film }}</td>
  <td>{{ object.Thick }}</td>
  <td>{{ object.Critical_temperature }}</td>
  <td>{{ object.R_s }}</td>

 {% endfor %}

{%for PartyNum%中的对象]
{{forloop.counter}}
{{object.Film}}
{{object.Thick}
{{object.Critical_temperature}}
{{object.R_s}
{%endfor%}

在Models.py中，我有一个类部件（Models.Model）

---

请帮我找出一个错误。

因此您有3个URL指向同一视图

url(r'^parties/(\d+)/$', PartyNumView),
url(r'^parties', PartyNumView),
url(r'^parties/(?P<pk>[\d]+)$', PartyNumView, name='onePart'),

尝试删除前两个URL，将最后一个URL保留为接受PK的URL。另外，在函数参数中，将

pk=None

更改为

pk

---

另外，请看一下您列出的最后两个URL。两者都指向同一个视图，因此您应该决定保留哪个视图。

出现错误是因为您试图

获取一个
部分
实例，该实例在数据库中不可用。也就是说，您通过url提供了一个
pk
值，但它与数据库不匹配。

只需查询现有的
零件
对象，即可避免此错误。或者，您可以修改以下响应，

from django.http.response import HttpResponse 
def PartyNumView(request, pk=None, page_number = 1):
    all_parties = Part.objects.all()
    current_page = Paginator(all_parties, 10)
    try:
        context = current_page.page(page_number)
    except PageNotAnInteger:
        context = current_page.page(1)
    except EmptyPage:
        context = current_page.page(current_page.num_pages)
    try:
        onePart = Part.objects.get(pk=pk)
    except Part.DoesNotExist:
        return HttpResponse("Part instance not found with pk-{}".format(pk))
    return render_to_response('part_list.html', {'PartyNum': context, 'onePart': onePart})



更新-1

更新您的
url.py
，如下所示

urlpatterns = [
    url(r'^admin/', admin.site.urls),
    url(r'parties/(?P<pk>[\d]+)/(?P<page_number>[\d]+)$', PartyNumView, name='onePart'),
    url(r'^main/', TemplateView.as_view(template_name='main.html')),       #static html
    url(r'^measures/', TemplateView.as_view(template_name='IcDesc.html')),       #static html

]

urlpatterns=[
url（r“^admin/”，admin.site.url），
url（r'parties/（？P[\d]+）/（？P[\d]+）$”，PartyNumView，name='onePart'），
url（r“^main/”，TemplateView.as_view（template_name='main.html'），#静态html
url（r“^measures/”，TemplateView.as_view（template_name='IcDesc.html'）），#静态html
]
最有可能的情况是，位于
onePart=get\u object\u或_404（Part，pk=pk）
的Part对象不存在，您将从中获得404。如果PK为“无”，请考虑删除该行。我有一个错误：用关键字参数{“pk”：9 }找不到“OnPoT”。尝试了1个模式：[“parti/（？P\[\\d]+）/$”]您尝试过吗？是的，我尝试过。但是当我删除这个URL时，我有错误404。我认为发生此错误是因为我必须转移到paginator page_number，但当我删除URL时，我无法这样做