Question

I am receiving notifications every time, when enter an address that does not exist.

Traceback (most recent call last):
File “/home/user/opt/local/django/core/handlers/base.py”, line 100, in get_response
File “/web/blog/views.py”, line 33, in post
File “/home/user/local/django/db/models/manager.py”, line 132, in get
File “/home/user/opt/local/django/db/models/query.py”, line 347, in get
DoesNotExist: Post matching query does not exist.

how to solve it

Answer 1

Modify your query to use get_object_or_404, or catch the YourModel.DoesNotExist (3rd paragraph) exception when you’re doing the lookup, and raise a Http404 exception. When you don’t catch the DoesNotExist exception the view raises a 500 error. As a side effect, this sends an exception email to the the ADMINS defined it settings.py.

Example of both cases:

from django.shortcuts import get_object_or_404

post_id = 1
post = get_object_or_404(Post, id=post_id)

# or catch the exception and do something with it

from django.http import Http404
try:
    post = Post.objects.get(id=post_id)
except Post.DoesNotExist:
    # id doesnt exist... do extra things here
    raise Http404