我是Django的初学者。现在,我正在通过构建一个名为PhoneReview的应用程序来学习该框架。它将存储与最新手机有关的评论。它还将显示电话品牌,以及相关的电话型号及其评论。
现在,我正在尝试在网址中使用Slug。我已经在两个模板中成功使用了Slug,这两个模板是 index.html 和 phonemodel.html 。但是,我遇到的第三个模板是 details.html 。
当我转到http://127.0.0.1:8000/index时,看到以下页面:
当我单击三星时,我看到此页面:
至此就可以了。 但是,当我单击任何型号的手机(例如 Galaxy S10 )时,都会出现404错误。看起来像这样:
Page not found (404)
Request Method: GET
Request URL: http://127.0.0.1:8000/details/galaxy-s10
Raised by: PhoneReview.views.ReviewView
No review found matching the query
You're seeing this error because you have DEBUG = True in your Django settings file. Change that to False, and Django will display a standard 404 page.
当我单击Samsung时,应该会看到 details.html 页面,其中包含电话的评论以及新闻链接。相反,我收到404错误。
这是我位于PhoneReview文件夹中的 models.py 的代码:
from django.db import models
from django.template.defaultfilters import slugify
# Create your models here.
class Brand(models.Model):
brand_name = models.CharField(max_length=100)
origin = models.CharField(max_length=100)
manufacturing_since = models.CharField(max_length=100, null=True, blank=True)
slug = models.SlugField(max_length=150, null=True, blank=True)
def __str__(self):
return self.brand_name
def save(self, *args, **kwargs):
self.slug = slugify(self.brand_name)
super().save(*args, **kwargs)
class PhoneModel(models.Model):
brand = models.ForeignKey(Brand, on_delete=models.CASCADE)
model_name = models.CharField(max_length=100)
launch_date = models.CharField(max_length=100)
platform = models.CharField(max_length=100)
slug = models.SlugField(max_length=150, null=True, blank=True)
def __str__(self):
return self.model_name
def save(self, *args, **kwargs):
self.slug = slugify(self.model_name)
super().save(*args, **kwargs)
class Review(models.Model):
phone_model = models.ManyToManyField(PhoneModel, related_name='reviews')
review_article = models.TextField()
date_published = models.DateField(auto_now=True)
slug = models.SlugField(max_length=150, null=True, blank=True)
link = models.TextField(max_length=150, null=True, blank=True)
def __str__(self):
return self.review_article
这是我位于PhoneReview文件夹中的 urls.py 的代码:
from . import views
from django.urls import path
app_name = 'PhoneReview'
urlpatterns = [
path('index', views.BrandListView.as_view(), name='brandlist'),
path('phonemodel/<slug:slug>', views.ModelView.as_view(), name='modellist'),
path('details/<slug:slug>', views.ReviewView.as_view(), name='details'),
]
这是我位于PhoneReview文件夹中的 views.py 的代码:
from django.shortcuts import render, get_object_or_404
from django.views import generic
from .models import Brand, PhoneModel, Review
class BrandListView(generic.ListView):
template_name = 'PhoneReview/index.html'
context_object_name = 'all_brands'
def get_queryset(self):
return Brand.objects.all()
class ModelView(generic.ListView):
template_name = 'PhoneReview/phonemodel.html'
context_object_name = 'all_model_name'
def get_queryset(self):
self.brand = get_object_or_404(Brand, slug=self.kwargs['slug'])
return PhoneModel.objects.filter(brand=self.brand)
class ReviewView(generic.DetailView):
model = Review
template_name = 'PhoneReview/details.html'
这是我位于PhoneReview文件夹中的 apps.py 代码:
from django.apps import AppConfig
class PhonereviewConfig(AppConfig):
name = 'PhoneReview'
这是我在模板文件夹中的 index.html 代码:
{% extends 'PhoneReview/base.html' %}
{% load static %}
{% block title%}
Brand List
{% endblock %}
{% block content %}
<!--Page content-->
<h1>This is Brand List Page</h1>
<h2>Here is the list of the brands</h2>
<ul>
{% for brand in all_brands %}
<!-- <li>{{ brand.brand_name }}</li>-->
<li><a href = "{% url 'PhoneReview:modellist' brand.slug %}">{{ brand.brand_name }}</a></li>
{% endfor %}
</ul>
<img src="{% static "images/brandlist.jpg" %}" alt="Super Mario Odyssey" /> <!-- New line -->
{% endblock %}
这是我在模板文件夹中的 phonemodel.html 代码:
{% extends 'PhoneReview/base.html' %}
{% load static %}
{% block title%}
Phone Model Page
{% endblock %}
{% block content %}
<!--Page content-->
<h1>This is Phone Model Page</h1>
<h2>Here is the phone model</h2>
<ul>
{% for phonemodel in all_model_name %}
<li><a href = "{% url 'PhoneReview:details' phonemodel.slug %}">{{ phonemodel.model_name }}</a></li>
{% endfor %}
</ul>
<img src="{% static "images/brandlist.jpg" %}" alt="Super Mario Odyssey" /> <!-- New line -->
{% endblock %}
这是我的 details.html 代码,位于模板文件夹中:
{% extends 'PhoneReview/base.html' %}
{% load static %}
<html>
<link rel="stylesheet" type="text/css" href="{% static "css/style.css" %}">
<html lang="en">
{% block title%}Details{% endblock %}
{% block content %}
<h1>This is the Details Page</h1>
<h2>Review:</h2>
<p>{{ review.review_article }}</p>
<h2>News Link:</h2>
<a href={{ review.link }}>{{ review.link }}</a>
{% endblock %}
</html>
我在 models.py 或 details.html 中犯了任何错误吗?
答案 0 :(得分:1)
我认为这里的代码没有错误。通过python3 manage.py shell
打开Django shell,然后运行以下查询
我想这可能会给NotFound
带来错误,因为没有模型带有galaxy-s10
的子弹
from your_app.models import Review
samsung_s10 = Review.objects.get(slug='galaxy-s10')
print(smasung_s10.slug)