Django-NoReverseMatch错误，即使有正确的参数(没有名称空间)

Question

我正在尝试创建一个存储问题(特别是数学问题(并向用户显示这些问题的应用程序。我还没有添加太多我想要的功能，由于我对Django还很陌生，我一直在关注Django教程项目，并根据我的需求进行更改。然而，我遇到了NoReverseMatch错误，尽管我似乎传入了正确的参数。我的代码在下面。

型号.py

import imp
from django.db import models
from django.urls import reverse
import uuid
# Create your models here.
class Source(models.Model):
'''Model that represents the source of a problem (e.g. AMC, AIME, etc.)'''
problem_source = models.CharField(max_length=20)
problem_number = models.PositiveSmallIntegerField()
def __str__(self):
'''toString() method'''
return f'{self.problem_source} #{self.problem_number}'
class Topic(models.Model):
'''Model that represents the topic of a problem (e.g. Intermediate Combo)'''
problem_topic = models.CharField(max_length=50)
problem_level = models.CharField(max_length=15)
def __str__(self):
return f'{self.problem_level} {self.problem_topic}'
class Problem(models.Model):
'''Model that represents each problem (e.g. AIME #1, AMC #11, etc.)'''
id = models.UUIDField(primary_key=True, default=uuid.uuid4)
source = models.OneToOneField(Source, on_delete=models.RESTRICT, null=True, unique=True)
problem_text = models.TextField()
topic = models.ManyToManyField(Topic)
def __str__(self):
"""String for representing the Model object."""
return f'{self.source}'
def get_absolute_url(self):
"""Returns the url to access a detail record for this book."""
return reverse('problem-detail', args=[str(self.id)])

urls.py

from django.urls import path
from . import views
urlpatterns = [
path('', views.index, name='index'),
path('problems/', views.ProblemListView.as_view(), name='problems'),
path('problem/<int:pk>', views.ProblemListView.as_view(), name='problem-detail'),
]

views.py

import imp
from django.shortcuts import render
# Create your views here.
from .models import Problem, Source, Topic
def index(request):
'''View function for home page of site'''
# generate counts of the main objects
num_problems = Problem.objects.all().count()
context = {
'num_problems': num_problems,
}
return render(request, 'index.html', context=context)
from django.views import generic
class ProblemListView(generic.ListView):
model = Problem
class ProblemDetailView(generic.DetailView):
model = Problem

到我的HTML文件的链接如下：
base_generic.HTML：链接
problem_list.HTML：链接
problem_detail.HTML：链接TR

我的工作区结构如下：

trivial
catalog
migrations
static/css
styles.css
templates
catalog
problem_detail.html
problem_list.html
base_generic.html
index.html
__init.py
admin.py
apps.py
models.py
tests.py
urls.py
views.py
trivial
__init__.py
asgi.py
settings.py
urls.py
wsgi.py
db.sqlite3
manage.py

我读过其他StackOverflow的帖子，但似乎没有一篇适用于我的情况。此外，在problem_list.html中，如果href链接中的值是Problem.get_absolute_url，则站点将加载，但单击"的链接；所有问题"；将返回到同一页。但是，如果我把prob.get_absolute_url放在href链接中，我会得到一个NoReverseMatch错误

这是我得到的确切错误：

NoReverseMatch at /catalog/problems/
Reverse for 'problem-detail' with arguments '('41b936f7-3c08-4fb9-a090-2d466348d34d',)' not found. 1 pattern(s) tried: ['catalog/problem/(?P<pk>[0-9]+)\Z']
Request Method:     GET
Request URL:    http://127.0.0.1:8000/catalog/problems/
Django Version:     4.0.2
Exception Type:     NoReverseMatch
Exception Value:    
Reverse for 'problem-detail' with arguments '('41b936f7-3c08-4fb9-a090-2d466348d34d',)' not found. 1 pattern(s) tried: ['catalog/problem/(?P<pk>[0-9]+)\Z']

Django告诉我错误源于在problem_list.html中调用prob.get_absolute_url

Answer 1

问题是Problem模型上的id是UUID，但URL模式需要一个整数值作为pk，因为您在命名模式前面加了int::

path('problem/<int:pk>', views.ProblemListView.as_view(), name='problem-detail'),

如果您将其更改为：，它应该可以工作

path('problem/<uuid:pk>', views.ProblemListView.as_view(), name='problem-detail'),