我正在研究 Django 博客，错误是

Question

Page not found (404) Request Method: GET Request URL: http://127.0.0.1:8000/detail/python Raised by: main.views.blog_detail No Blog matches the given query.

It says that the error is raised by "main.views.blog_detail", What am I missing or what could be the erroe?

This is my urls.py:

from django.urls import path
from . import views

app_name = 'main'

urlpatterns = [
    path('' , views.test , name='test_view'),
    path('blog/', views.blog_list, name='blog_list'),
    path('<slug:category_slug>' , views.blog_list , name='blog_list'),
    path('detail/<slug:blog_slug>' , views.blog_detail , name='blog_detail'),

]

This is my views.py file:

    from django.shortcuts import render
from django.http import HttpResponse
from .models import Blog,BlogCategory
from django.shortcuts import get_object_or_404

# Create your views here.
def test(request):

    template = 'base.html'

    # context = {'product_list':productlist, 'category_list':categorylist, 'category':category}
    return render(request, template)

def blog_list(request, category_slug=None):
    category = None
    bloglist = BlogCategory.objects.all()

    if category_slug:
        category = get_object_or_404(BlogCategory,slug=category_slug)
        bloglist = bloglist.filter(category=category)

    template = 'main/blog.html'

    context = {'blog_list':bloglist}
    return render(request, template, context)

def blog_detail(request, blog_slug):
    print(blog_slug)
    blogdetail = get_object_or_404(Blog, slug=blog_slug)
    template = 'Main/blog_details.html'
    context = {'blog_detail':blogdetail}
    return render(request, template, context)

This is my models.py file:

from django.db import models
from datetime import datetime
from django.utils.text import slugify

# Create your models here.
class Blog(models.Model):
    blog_title = models.CharField(max_length=200)
    blog_content = models.TextField()
    blog_published = models.DateTimeField('date published', default=datetime.now)
    blog_category = models.ForeignKey('BlogCategory', on_delete=models.SET_NULL, null=True)
    slug = models.SlugField(blank=True,null=True)

    def save(self, *args, **kwargs):
        if not self.slug and self.blog_title:
            self.slug = slugify(self.blog_title)
        super(Blog,self).save(*args, **kwargs)

    def __str__(self):
        return self.blog_title



class BlogCategory(models.Model):

    blog_category = models.CharField(max_length=200)
    blog_summary = models.CharField(max_length=200)
    slug = models.SlugField(blank=True,null=True)

    def save(self, *args, **kwargs):
        if not self.slug and self.blog_category:
            self.slug = slugify(self.blog_category)
        super(BlogCategory,self).save(*args, **kwargs)

    class Meta:
        # Gives the proper plural name for admin
        verbose_name_plural = "Categories"

    def __str__(self):
        return self.blog_category

This is my bloglist.html:

{% extends 'base.html' %}

{% block content %}
  <div class="row">
    {% for bl in blog_list %}
        <div class="col s12 m6">
          <a href="{% url 'main:blog_detail' bl.slug %}">
          <div class="card hoverable">
            <div class="card-content">
              <span class="card-title">{{bl.blog_category}}</span>
              <p style="font-size:70%">Published {{bl.blog_published}}</p>
              <p>{{bl.blog_summary}}</p>
            </div>
          </div>
        </div>
    {% endfor %}
{% endblock %}

This is my blogdetails.html:

{% extends 'base.html' %}

{% block content %}

    <div class="row">
        <div class="col s12, m8, l8">
            <h3>{{blog_detail.blog_title}}</h3>
            <p style="font-size:70%">Published {{blog_detail.blog_published}}</p>
            {{blog_detail.blog_content|safe}}
        </div>
    </div>

{% endblock %}

Answer 1

You have to just change a name of 'Main' to 'main' because your blog_details.html page was in main directory. And also check name of blog_details.html directory properly than integrate it properly with perfect name.

 template = 'main/blog_details.html'