Handling errors 404/500 in Django - django

Question

There is a little problem with my Django application: my project is a blog with several posts. You can access the first post by typing localhost:8000/blog/post/1 in the URL bar. To read the post no. X you have to type localhost:8000/blog/post/X. So I need to display a custom "Error 404" page when an inexistant post is requested (for example localhost:8000/blog/post/32 if there are only 3 posts available). The problem is, instead of throwing a 404 error, it throws a Server Error (500) error however I never coded something to throw this kind of error.
Here is the concerned code parts, but not my full code which I think is useless.
Project name is red_pillers, app name is blog.
in red_pillers/settings.py
DEBUG = False
ALLOWED_HOSTS = ['127.0.0.1', 'localhost']
red_pillers/urls.py
from django.contrib import admin
from django.urls import path, re_path, include
from django.conf.urls import handler404
from . import views
handler404 = 'red_pillers.views.handler404'
urlpatterns = [
re_path('^blog/', include('blog.urls')),
re_path('^$', views.home),
re_path('^admin/', admin.site.urls),
]
red_pillers/views.py
from django.shortcuts import render
def home(request):
return render(request, 'home.html')
def handler404(request):
return render(request, 'errors/404.html', {}, status=404)
blog/pycode/post.py
from django.http import Http404
class Post:
POSTS = [
{'id': 1, 'title': 'First Post', 'body': 'This is my first post'},
{'id': 2, 'title': 'Second Post', 'body': 'This is my second post'},
{'id': 3, 'title': 'Third Post', 'body': 'This is my third post'},
]
#classmethod
def all(cls):
return cls.POSTS
#classmethod
def find(cls, id):
try:
return cls.POSTS[int(id) - 1]
except:
raise Http404('Error 404...')
EDIT: added more code
blog/urls.py
from django.urls import path, re_path
from . import views
urlpatterns = [
re_path('^$', views.index),
re_path('^posts/(?P<id>[0-9]+)$', views.show),
]
blog/views.py
from django.shortcuts import render
from .pycode.post import Post
def index(request):
posts = Post.all()
return render(request, 'blog/index.html', {'posts': posts})
def show(request, id):
post = Post.find(id)
return render(request, 'blog/show.html', {'post': post})

Answer 1

Use get_object_or_404, which will redirect you if it doesn't exist.