URL evaluates to 'slug' literally instead of the variable slug
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Michael Starr
Nov 30, 2022, 8:52:36 AM11/30/22
to Django users
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')),
]
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'
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'
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'),]
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'),]
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'
from django.views.generic.detail import DetailView
from pet.models import Pet
class PetDetailView(DetailView):
model = Pet
slug_url_kwarg = 'slug'
slug_field = 'slug'
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})
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})
from django.apps import AppConfig
class PetConfig(AppConfig):
default_auto_field = "django.db.models.BigAutoField"
name = "pet"
class PetConfig(AppConfig):
default_auto_field = "django.db.models.BigAutoField"
name = "pet"
from django.contrib import admin
from .models import Pet
admin.site.register(Pet)
from .models import Pet
admin.site.register(Pet)
"""
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"
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>
<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>
<!DOCTYPE html>
<html lang="en" dir="ltr">
<head>
<meta charset="utf-8">
<title></title>
</head>
<body>
{{ pet_details }}
</body>
</html>
<html lang="en" dir="ltr">
<head>
<meta charset="utf-8">
<title></title>
</head>
<body>
{{ pet_details }}
</body>
</html>
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
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:
- admin/
- [name='home']
- 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
peteru mimo
Nov 30, 2022, 9:05:35 AM11/30/22
to Django users
Make your urls patterns at pet app
path('pet<slug:slug>/', pet_views.PetDetailView.as_view(), name='pet_details'),]
Ryan Nowakowski
Nov 30, 2022, 10:15:56 AM11/30/22
to Django users
On Tue, Nov 29, 2022 at 06:35:25PM -0800, Michael Starr wrote:
> *home folder / home.html*
You'll need to hard code the slug as well so:
<a href="{% url 'pet_details' slug='mocha' %}">Pet Profile: Mocha</a>
> *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>
In your home.html you've hard coded a link to a specific pet named Mocha.
> <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>
You'll need to hard code the slug as well so:
<a href="{% url 'pet_details' slug='mocha' %}">Pet Profile: Mocha</a>
Michael Starr
Nov 30, 2022, 12:18:29 PM11/30/22
to django...@googlegroups.com
Thank you. Though, that hard codes everything, which is bad. How do I
generalize it?
Also, this worked. I had to specify template_name = pet_profile.html in
the pet detail view.
generalize it?
Also, this worked. I had to specify template_name = pet_profile.html in
the pet detail view.
Ryan Nowakowski
Nov 30, 2022, 7:43:47 PM11/30/22
to django...@googlegroups.com
On Wed, Nov 30, 2022 at 09:16:39AM -0800, Michael Starr wrote:
> Thank you. Though, that hard codes everything, which is bad. How do I
> generalize it?
You'll need to do 2 things:
> Thank you. Though, that hard codes everything, which is bad. How do I
> generalize it?
1. Add the pet(s) you want to the template context, probably by implementing get_context_data[1].
2. Change your template to use the pet from the template context instead of the hard code pet, Mocha. Assuming your pet in the template context is named 'pet':
<a href="{% url 'pet_details' slug=pet.slug %}">Pet Profile: {{ pet.name }}</a>
...alternatively since you've implemented get_absolute_url:
<a href="{{ pet.get_absolute_url }}">Pet Profile: {{ pet.name }}</a>
[1] https://docs.djangoproject.com/en/4.1/ref/class-based-views/mixins-simple/#django.views.generic.base.ContextMixin.get_context_data
Michael Starr
Dec 4, 2022, 4:02:27 PM12/4/22
to Django users
Thank you. I will check this out. Sorry for the slow reply.
Michael Starr
Dec 4, 2022, 4:03:25 PM12/4/22
to Django users
Thank you, Peter. I forgot to acknowledge your contribution.
On Wednesday, November 30, 2022 at 4:43:47 PM UTC-8 Ryan Nowakowski wrote:
ELVIS MAKASI
Dec 5, 2022, 9:36:30 AM12/5/22
to django...@googlegroups.com
Good !😁
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Message has been deleted
Michael Starr
Dec 15, 2022, 5:54:59 PM12/15/22
to Django users
Sorry for that crass, asinine comment. I had a flare up of my condition.
Thank you all for the help.
Mike
On Sunday, December 11, 2022 at 4:32:04 PM UTC-8 Michael Starr wrote:
It's poorly written and mine isn't. Am I better than them.
Michael Starr
Dec 16, 2022, 8:51:14 PM12/16/22
to Django users
I hope someone is still subscribed to this post. I had another question...
I looked up your link, about context dictionary, presumably to modify the value returned by the function, like you said, to add the pets to it. I don't know what to loop or iterate over to get all the pets, first off. I know how to add them, I think, that would just be context[pet id or something] = <pet object instance>. Secondly, I'm assuming this function, get_context_data, goes in the models file. I understand how to retrieve context from the dictionary, you explained that as well as the professor in the course I took on Django, so no problems there (so far).
I think that's it, actually.
Thanks in advance, hugely appreciate any help anyone can offer.
Best,
Mike
Michael Starr
Dec 20, 2022, 4:45:10 PM12/20/22
to Django users
No reply yet, so bump.
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