Code is first, query is last (below). Thanks in advance.
*home directory urls.py*
from django.contrib import admin
from django.urls import path,include
from . import views
urlpatterns = [
path("admin/", admin.site.urls, name='admin'),
path("", views.Home.as_view(), name="home"),
path("pet/", include('pet.urls')),
]
*home directory views.py*
from django.shortcuts import render
from django.views.generic.detail import DetailView
from django.views.generic.base import TemplateView
from django.views.generic import View
class Home(TemplateView):
template_name = 'home.html'
*app "pet" urls.py*
from django.contrib import admin
from django.urls import path
from . import views as pet_views
from .models import Pet
urlpatterns = [
path('<slug:slug>', pet_views.PetDetailView.as_view(),
name='pet_details'),]
*app "pet" views.py*
from django.shortcuts import render
from django.views.generic.detail import DetailView
from pet.models import Pet
class PetDetailView(DetailView):
model = Pet
slug_url_kwarg = 'slug'
slug_field = 'slug'
*app "pet" models.py*
from django.db import models
from django.utils.text import slugify
class Pet(models.Model):
name = models.CharField(max_length=255)
age = models.IntegerField()
slug = models.SlugField(allow_unicode=True, max_length=100,
unique=True, default="default_pet_slug")
def __str__(self):
return self.name
def save(self, *args, **kwargs):
self.slug = slugify(self.name)
super().save(*args, **kwargs)
def get_absolute_url(self):
return reverse("pet:pet_details", kwargs={"slug": self.slug})
*apps.py*
from django.apps import AppConfig
class PetConfig(AppConfig):
default_auto_field = "django.db.models.BigAutoField"
name = "pet"
*admin.py*
from django.contrib import admin
from .models import Pet
admin.site.register(Pet)
*settings.py*
"""
Django settings for pet_memorial project.
Generated by 'django-admin startproject' using Django 4.1.
For more information on this file, see
https://docs.djangoproject.com/en/4.1/topics/settings/
For the full list of settings and their values, see
https://docs.djangoproject.com/en/4.1/ref/settings/
"""
from pathlib import Path
# Build paths inside the project like this: BASE_DIR / 'subdir'.
BASE_DIR = Path(__file__).resolve().parent.parent
# Quick-start development settings - unsuitable for production
# See https://docs.djangoproject.com/en/4.1/howto/deployment/checklist/
# SECURITY WARNING: keep the secret key used in production secret!
SECRET_KEY =
"django-insecure-zfb*2fvvz=_komv(#8(ho)ckc-+a3$^!@tua2#n^c&0*st=xm6"
# SECURITY WARNING: don't run with debug turned on in production!
DEBUG = True
ALLOWED_HOSTS = []
# Application definition
INSTALLED_APPS = [
"django.contrib.admin",
"django.contrib.auth",
"django.contrib.contenttypes",
"django.contrib.sessions",
"django.contrib.messages",
"django.contrib.staticfiles",
"pet",
]
MIDDLEWARE = [
"django.middleware.security.SecurityMiddleware",
"django.contrib.sessions.middleware.SessionMiddleware",
"django.middleware.common.CommonMiddleware",
"django.middleware.csrf.CsrfViewMiddleware",
"django.contrib.auth.middleware.AuthenticationMiddleware",
"django.contrib.messages.middleware.MessageMiddleware",
"django.middleware.clickjacking.XFrameOptionsMiddleware",
]
ROOT_URLCONF = "pet_memorial.urls"
TEMPLATES = [
{
"BACKEND": "django.template.backends.django.DjangoTemplates",
"DIRS": [
'pet_memorial/templates/',
'pet/templates/',
],
"APP_DIRS": True,
"OPTIONS": {
"context_processors": [
"django.template.context_processors.debug",
"django.template.context_processors.request",
"django.contrib.auth.context_processors.auth",
"django.contrib.messages.context_processors.messages",
],
},
},
]
WSGI_APPLICATION = "pet_memorial.wsgi.application"
# Database
# https://docs.djangoproject.com/en/4.1/ref/settings/#databases
DATABASES = {
"default": {
"ENGINE": "django.db.backends.sqlite3",
"NAME": BASE_DIR / "db.sqlite3",
}
}
# Password validation
#
https://docs.djangoproject.com/en/4.1/ref/settings/#auth-password-validators
AUTH_PASSWORD_VALIDATORS = [
{
"NAME":
"django.contrib.auth.password_validation.UserAttributeSimilarityValidator",
},
{"NAME":
"django.contrib.auth.password_validation.MinimumLengthValidator",},
{"NAME":
"django.contrib.auth.password_validation.CommonPasswordValidator",},
{"NAME":
"django.contrib.auth.password_validation.NumericPasswordValidator",},
]
# Internationalization
# https://docs.djangoproject.com/en/4.1/topics/i18n/
LANGUAGE_CODE = "en-us"
TIME_ZONE = "UTC"
USE_I18N = True
USE_TZ = True
# Static files (CSS, JavaScript, Images)
# https://docs.djangoproject.com/en/4.1/howto/static-files/
STATIC_URL = "static/"
# Default primary key field type
# https://docs.djangoproject.com/en/4.1/ref/settings/#default-auto-field
DEFAULT_AUTO_FIELD = "django.db.models.BigAutoField"
*home folder / home.html*
<!DOCTYPE html>
<html lang="en" dir="ltr">
<head>
<meta charset="utf-8">
<title></title>
</head>
<body>
test
<a href="{% url 'pet_details' slug='slug' %}">Pet Profile: Mocha</a>
</body>
</html>
*"pet" templates folder / pet_profile.html*
<!DOCTYPE html>
<html lang="en" dir="ltr">
<head>
<meta charset="utf-8">
<title></title>
</head>
<body>
{{ pet_details }}
</body>
</html>
*the error*
Page not found (404)
No pet found matching the query
Request Method: GET
Request URL: http://127.0.0.1:8000/pet/slug
Raised by: pet.views.PetDetailView
Using the URLconf defined in pet_memorial.urls, Django tried these URL
patterns, in this order:
1. admin/
2. [name='home']
3. pet/ <slug:slug> [name='pet_details']
The current path, pet/slug, matched the last one.
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.
-------------------------------------
I am trying to make an app for people to share information about their pets
(animals). I have made the framework files so far, but have run into a
problem getting the pet's slug (which should be unique for each pet, in
order to have a unique URL for each pet's profile page with no collisions
between pets if by chance named the same).
I have no idea why the slug is not evaluating to the default default_pet_slug
in models.py as defined by default = "default_pet_slug". But in any case,
why doesn't the slug match itself? It is a variable in both the url.py file
(in pets app) and in the home.html a-href link. The homepage renders just
fine, but this error pops up when I click on the link defined in the
homepage's html template, home.html.
A PDF printout of the error page is attached for verity.
Any help is appreciated. Many thanks.
Michael
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Page not found at _pet_slug.pdf
Description: Adobe PDF document
