Python 无法解决'；阅读《华盛顿邮报》'；带参数'；（'；'；，）'；没有找到。尝试了1种模式：['；read#u post/（？P<；id>；[0-9]+；）$'；]

我的模板中有一个导航栏，我试图在其中添加一个活动类，但是，每当我这样做时，都会出现以下错误：

NoReverseMatch at /
Reverse for 'read_post' with arguments '('',)' not found. 1 pattern(s) tried: ['read_post/(?P<id>[0-9]+)$']
Request Method: GET
Request URL:    http://127.0.0.1:8000/
Django Version: 3.1.7
Exception Type: NoReverseMatch
Exception Value:    
Reverse for 'read_post' with arguments '('',)' not found. 1 pattern(s) tried: ['read_post/(?P<id>[0-9]+)$']
Exception Location: C:\Users\Abdullah\AppData\Local\Programs\Python\Python39\lib\site-packages\django\urls\resolvers.py, line 685, in _reverse_with_prefix
Python Executable:  C:\Users\Abdullah\AppData\Local\Programs\Python\Python39\python.exe
Python Version: 3.9.2
Python Path:    
['C:\\Users\\Abdullah\\Desktop\\Blog\\my_blog',
 'C:\\Users\\Abdullah\\AppData\\Local\\Programs\\Python\\Python39\\python39.zip',
 'C:\\Users\\Abdullah\\AppData\\Local\\Programs\\Python\\Python39\\DLLs',
 'C:\\Users\\Abdullah\\AppData\\Local\\Programs\\Python\\Python39\\lib',
 'C:\\Users\\Abdullah\\AppData\\Local\\Programs\\Python\\Python39',
 'C:\\Users\\Abdullah\\AppData\\Roaming\\Python\\Python39\\site-packages',
 'C:\\Users\\Abdullah\\AppData\\Local\\Programs\\Python\\Python39\\lib\\site-packages']
Server time:    Wed, 21 Apr 2021 09:38:37 +0000

这是我的博客app/posts.html：

`{% extends 'blog_app/base.html' %}

{% block content %}
    {% if messages %}
    <ul class="messages">
        {% for message in messages %}
        <li {% if message.tags %} class="{{ message.tags }}"{% endif %}>{{ message }}</li>
        {% endfor %}
    </ul>
    {% endif %}    
    {% for post in posts %}
    <div>
        <h2>{{ post.title }}</h2>
        
        <a href="{% url 'read_post' post.id %}"><button>Read blog</button></a>

        
        <h4>Posted by {{ post.author }} on {{ post.datetime }}</h4>
        
        <br>
    </div>

    {% endfor %}

{% endblock %}`

---

另外，请建议添加活动链接类的方法，因为我无法做到这一点。

显示

blog\u app/posts.html

的内容。除查看

Post

外，还要删除所有其他视图代码。刚才，请看一看，您是否自己在

Post

模型上设置了一些主键？尝试编写

{%url'read_post'post.pk%}

而不是

{%url'read_post'post.id%}

（

post.pk

而不是

post.id

）。如果这不起作用，请显示您的

Post

模型。我没有设置主键，因为我认为没有必要设置主键。另外，我不认为有必要将id传递到{%url'posts'post.pk%}。但是我没有说任何关于

{%url'posts'post.pk%}

的内容？我说的是

blog\u app/posts.html

中的

{%url'read\u post'post.id%}

行。

The `urlpatterns` list routes URLs to views. For more information please see:
    https://docs.djangoproject.com/en/3.1/topics/http/urls/
Examples:
Function views
    1. Add an import:  from my_app import views
    2. Add a URL to urlpatterns:  path('', views.home, name='home')
Class-based views
    1. Add an import:  from other_app.views import Home
    2. Add a URL to urlpatterns:  path('', Home.as_view(), name='home')
Including another URLconf
    1. Import the include() function: from django.urls import include, path
    2. Add a URL to urlpatterns:  path('blog/', include('blog.urls'))
"""
from django.contrib import admin
from django.urls import path
from blog_app import views
from django.contrib.auth import views as auth_views

urlpatterns = [
    path('admin/', admin.site.urls),
    path('', views.posts, name='posts'),
    path('signup', views.signup, name="signup"),
    path('login', auth_views.LoginView.as_view(template_name='blog_app/login.html'), name='login'),
    path('logout', auth_views.LogoutView.as_view(template_name='blog_app/logout.html'), name='logout'),
    path('post', views.post, name='post'),
    path('myposts', views.myposts, name='myposts'),
    path('delete_post/<int:id>', views.delete_post, name='delete_post'),
    path('edit_post/<int:id>', views.edit_post, name='edit_post'),
    path('read_post/<int:id>', views.read_post, name='read_post')
]`

`def posts(request):
    posts = Post.objects.all()
    return render(request, 'blog_app/posts.html', {'posts': posts})
`

`{% extends 'blog_app/base.html' %}

{% block content %}
    {% if messages %}
    <ul class="messages">
        {% for message in messages %}
        <li {% if message.tags %} class="{{ message.tags }}"{% endif %}>{{ message }}</li>
        {% endfor %}
    </ul>
    {% endif %}    
    {% for post in posts %}
    <div>
        <h2>{{ post.title }}</h2>
        
        <a href="{% url 'read_post' post.id %}"><button>Read blog</button></a>

        
        <h4>Posted by {{ post.author }} on {{ post.datetime }}</h4>
        
        <br>
    </div>

    {% endfor %}

{% endblock %}`

`from django.db import models
from django.contrib.auth.models import User
from django.utils import timezone
from datetime import datetime

# Create your models here.

class Post(models.Model):
    title = models.CharField(max_length=100)
    content = models.TextField()
    author = models.ForeignKey(to=User, on_delete=models.CASCADE)
    date_time = timezone.now()
    # datetime = models.DateTimeField(auto=timezone.now)`