I have a code that causes an exception (function called from template).
When DEBUG=True it correctly raises Exception.
But when DEBUG=False just blank page is displayed.
What should I do to disable such behavior?
If you want to show the Django debugging exception page in production, you shouldn't do this.
If you just want to create a custom error page, create a template called 500.html - this will be rendered instead of a blank page.
Related
While using django and django rest framework and strictly using the frame work code.
Example,
using a router connected to a view set to a serializer into a model.
What I mean is no custom code, other than what is required to feed into the django rest frameworks code, do we not need exceptions?
I ask because in all the code examples I have seen, I have yet to see a try catch block.
thank you
Generally, there will be some type of error thrown if the data is in the incorrect format or doesn't contain correct values such as a wrong data type or invalid primary key on some request. The Django REST Framework serializers take care of these kinds of errors by raising ValidationErrors and keeping track of errors in serializer.Serializer._errors. The DRF framework presents these errors back to the user in a suitable format, for example:
{"detail": "Method 'DELETE' not allowed."}
when a user tried to send a HTTP DELETE request. More information on how DRF handles different exceptions can be found here.
As for code that you write yourself within views, serializers, models etc. that is up to you to try/except and handle however you deem necessary. Often in a serializer, you might use raise ValidationError(yourError) and in a view you might return Response(yourError, status=400).
Hope I've helped.
I absolutely LOVE flask's debug page that shows up when an exception is raised and you're in debug mode. However, I develop a lot of applications that make heavy use of AJAX, and unfortunately you don't get that beautiful debugging when the exception occurs from an AJAX request. You just get a 500 Internal Server Error printed to the browser's console.
I understand why you don't get the page - because the page isn't reloading - but still, I want to ask if there's a way to get a really nice page like that in the event of an exception in an AJAX call.
I am getting ready to deploy my first Django application and am hitting a bit of a roadblock. My base template relies on me passing in the session object so that it can read out the currently logged in user's name. This isn't a problem when I control the code that is calling a template.
However, as part of getting this app ready to be deployed, I need to create a 404.html page. I extended my base template just like I've done with my other pages, but I don't see a way to pass in the session object so that I can utilize it. Is there a way to have Django call a custom method to render your 404 rather than just rendering your 404.html for you?
You need to override the default view handler for the 404 error. Here is the documentation on how to create your own custom 404 view function:
http://docs.djangoproject.com/en/dev/topics/http/views/#customizing-error-views
Define your own 404 handler. See Django URLs, specifically the part about handler404.
I'm coding a small application with Django. But I can't see any error logs in the console when an error (e.g. Python syntax error, etc.) occurs in one of my views -no action at all.
How can I see the error logs of my views? Debugging like a blind is really annoying.
Django does not print any errors to the console by default. Instead it provides very helpful error pages that are displayed for any errors that occur in your views. Please check what your DEBUG setting is set to. In development this should be True which will give you the nice error pages for 404 and 500 errors.
The pretty error page will look like this:
(source: linkaider.com)
I can also recommend the talk What the Heck Went Wrong? from DjangoCon2009 for some more information on basic debugging technics with django.
I know that you use .htaccess in the document-root directory in standard Apache.
What if I use Django? Can someone give me step by step how to create a custom 404 page?
The default 404 handler calls 404.html . You could edit that if you don't need anything fancy or can override the 404 handler by setting the handler404 view -- more here