django 问题中的产品详细信息和图像

Question

我正在尝试创建一个简单的汽车经销商应用程序，但我遇到了困难。我已经搜索了几天，并且尝试了很多次来解决这个问题，但我做不到。我不知道我做错了什么，我的大脑不再工作了。感谢您的帮助。

错误：

NoReverseMatch at /
Reverse for 'car_detail' with keyword arguments '{'slug': '2021-ram-1500-trx-crew-cab-4x4-57-box'}' not found. 1 pattern(s) tried: ['(?P<id>[0-9]+)/(?P<slug>[-a-zA-Z0-9_]+)$']

请求方法：GET 请求 URL：http://127.0.0.1:8000/ 姜戈版本：3.2.8 异常类型：NoReverseMatch 异常值：
反向 'car_detail' 关键字参数 '{'slug': '2021-ram-1500-trx-crew-cab-4x4-57-box'}' 未找到。尝试了 1 种模式：['(?P[0-9]+)/(?P[-a-zA-Z0-9_]+)$'] 异常位置：C:\Users*\Desktop\Testdealer\envdealer\lib\site-packages\django\urls\resolvers.py, line 694, in _reverse_with_prefix Python 可执行文件：C:\Users*\Desktop\Testdealer\envdealer\Scripts\python.exe Python版本：3.9.7

Models.py:


from django.db import models
import datetime
from django.urls import reverse

class Car(models.Model):
    brand = models.CharField(max_length=100)
    CATEGORY = (
        ('New', 'New'),
        ('Used', 'Used')
    )
    slug = models.SlugField(max_length=200, null=True, unique=True)
    category = models.CharField(max_length=50, choices=CATEGORY)
    image_main = models.ImageField(upload_to='images')
    body_style = models.CharField(max_length=100, blank=True)
    engine = models.CharField(max_length=100, blank=True)
    stock_number = models.IntegerField(blank=True, null=True)
    mpg = models.CharField(max_length=100, blank=True)
    exterior_color = models.CharField(max_length=100, blank=True)
    interior_color = models.CharField(max_length=100, blank=True)
    drivetrain = models.CharField(max_length=100, blank=True)
    mileage = models.IntegerField(blank=True, null=True)
    sold = models.BooleanField(default=False, blank=False)
    transmission = models.CharField(max_length=50, blank=True)
    YEAR_CHOICES = [(r, r) for r in range(1940, datetime.date.today().year+1)]
    year = models.IntegerField(
        ('year'), choices=YEAR_CHOICES, default=datetime.datetime.now().year)
    power = models.IntegerField()
    fuel = models.CharField(max_length=50, blank=True)
    price = models.CharField(max_length=10, blank=True)
    description = models.TextField()
    date = models.DateField()

    def __str__(self):
        return self.brand

    def get_absolute_url(self):
        return reverse('car_detail', kwargs={'slug': self.slug})

    # def get_absolute_url(self):
    #     return reverse('car_detail', kwargs={
    #         'car_id': self.id
    #     })

class CarImage(models.Model):
    """
    The Product Image table.
    """
    name = models.CharField(max_length=200, blank=True)
    car = models.ForeignKey(
        Car, on_delete=models.CASCADE, related_name="car_image")
    image = models.ImageField(
        verbose_name="image",
        help_text="Upload a product image",
        upload_to="images/",
        default="images/default.png",
    )
    alt_text = models.CharField(
        verbose_name="Alturnative text",
        help_text="Please add alturnative text",
        max_length=255,
        null=True,
        blank=True,
    )

    class Meta:
        verbose_name = "Car Image"
        verbose_name_plural = "Car Images"

    def __str__(self):
        return self.name

Views.py:

from django.shortcuts import render, get_object_or_404
from .models import Car, Dealer, CarImage
from django.core.mail import send_mail

def car_detail(request, id, slug):
    cars = Car.objects.get(pk=id)
    images = CarImage.objects.filter(car_id=id)
    context = {'cars': cars, 'images': images}
    return render(request, 'car_detail.html', context)

Urls.py:

from django.contrib import admin
from django.urls import path
from django.conf.urls.static import static
from django.conf import settings
from cars import views

..........

path('<int:id>/<slug:slug>', views.car_detail, name="car_detail"),

Answer 1

Car模型的.get_absolute_url() [Django-doc]只指定了slug，没有指定id参数：

class Car(models.Model):
    # ⋮

    def get_absolute_url(self):
        #                add id to the context ↓
        return reverse('car_detail', kwargs={<strong>'id': self.pk</strong>, 'slug': self.slug})

django 问题中的产品详细信息和图像

Product detail and images in django problem

python

django

product

image