Django 500 Error View
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A view function, or view for short, is simply a Python function that takes a Web request and returns a Web response. This response can be the HTML contents of a Web page, or a redirect, django 500 error log or a 404 error, or an XML document, or an image . . . django 500 error page or anything, really. The view itself contains whatever arbitrary logic is necessary to return that response. This code can live anywhere django 500 error template you want, as long as it's on your Python path. There's no other requirement-no "magic," so to speak. For the sake of putting the code somewhere, the convention is to put views in a
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file called views.py, placed in your project or application directory. A simple view¶ Here's a view that returns the current date and time, as an HTML document: from django.http import HttpResponse import datetime def current_datetime(request): now = datetime.datetime.now() html = "
It is now %s." % now return HttpResponse(html) Let's step through this code one line at a time: First, we import the class HttpResponse from the django.http drupal 500 error module, along with Python's datetime library. Next, we define a function called current_datetime. This is the view function. Each view function takes an HttpRequest object as its first parameter, which is typically named request. Note that the name of the view function doesn't matter; it doesn't have to be named in a certain way in order for Django to recognize it. We're calling it current_datetime here, because that name clearly indicates what it does. The view returns an HttpResponse object that contains the generated response. Each view function is responsible for returning an HttpResponse object. (There are exceptions, but we'll get to those later.) Django's Time Zone Django includes a TIME_ZONE setting that defaults to America/Chicago. This probably isn't where you live, so you might want to change it in your settings file. Mapping URLs to views¶ So, to recap, this view function returns an HTML page that includes the current date and time. To display this view at a particular URL, you'll need to create a URLconf; see URL dispatcher for instructions. Returning errors¶ Returning HTTP error codes in Django is easy. There are subclasses of HttpResponse for a number of common HTTP status codes other thlayout of ruby on rails 500 error all other site pages. This means avoiding that
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our users saw the dafault Apache error pages having the feeling that they
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had quitted our application. Django offers a simple and elegant way to manage the more common HTTP errors, such as https://docs.djangoproject.com/en/1.10/topics/http/views/ 400, 403, 404 and 500, enabling us to specify our custom views and templates. All we need is to add these lines in our urls.py # urls.py from django.conf.urls import ( handler400, handler403, handler404, handler500 ) handler400 = 'my_app.views.bad_request' handler403 = http://blog.eliacontini.info/post/118617321553/django-custom-error-pages 'my_app.views.permission_denied' handler404 = 'my_app.views.page_not_found' handler500 = 'my_app.views.server_error' # ... and implement our custom views in views.py. # views.py from django.shortcuts import ( render_to_response ) from django.template import RequestContext # HTTP Error 400 def bad_request(request): response = render_to_response( '400.html', context_instance=RequestContext(request) ) response.status_code = 400 return response # ... References Customizing error views ❤ 0 #django|#error pages|#http|#custom| Share Share this article on LinkedIn | Tweet this article | Share this article on Google+ View the discussion thread. blog comments powered by Disqus © 2011-2016 Elia Contini. The content of this website is licensed under a CC BY-NC-ND 4.0 International License. Elia Contini su LinkedIn Elia Contini su Twitter Elia Contini su Google+ Elia Contini su GitHub Elia Contini su Tumblr Elia Contini's Blog RSS
processors (like one that sets a MEDIA_URL), they don't get called. http://ericholscher.com/blog/2009/sep/23/pretty-django-error-pages/ This was causing our 500 pages not only to make http://django.readthedocs.io/en/latest/ref/views.html users sad because something broke, but knock them out of context becaue our entire design blew up. Luckily, Django makes it incredibly simple to redefine your 500 handler in your URLConf. Most pythonistas know that import * is a bad 500 error thing, but it is standard in the Django community in your URLConf to do a from django.conf.urls.defaults import *. This has the effect of pulling in Django's default handler500 function. So if you want to override Django's default, you simply set it up like so. from django.conf.urls.defaults django 500 error import * handler500 = 'path.to.my.sweet.views.server_error' Then you simply define a server_error view that renders the error page with a RequestContext. from django.shortcuts import render_to_response from django.template import RequestContext def server_error(request, template_name='500.html'): """ 500 error handler. Templates: `500.html` Context: None """ return render_to_response(template_name, context_instance = RequestContext(request) ) If you're feeling extra special, you can even change the template rendered. Note that you can also do this for the 404 handler by defining a 404handler in your URLConf in the same fashion. Then you can get pretty error pages! Token Testing Talk Slides: Djangocon 2009 Hacker Book Club Surfing in Kansas Sep 23, 2009 Eric Holscher Portland, Oregon Find me online Twitter GitHub Subscribe RSS Hire Me I provide consulting around documentation processes and tooling Conferences Write the Docs is happening in Europe and North America this year Quick search ©2016, Eric Holscher. | Powered by Sphinx 1.4.1 & Alabaster 0.7.9 | Page source
documentation. Serving files in development¶ static.serve(request, path, document_root, show_indexes=False)¶ There may be files other than your project's static assets that, for convenience, you'd like to have Django serve for you in local development. The serve() view can be used to serve any directory you give it. (This view is not hardened for production use and should be used only as a development aid; you should serve these files in production using a real front-end web server). The most likely example is user-uploaded content in MEDIA_ROOT. django.contrib.staticfiles is intended for static assets and has no built-in handling for user-uploaded files, but you can have Django serve your MEDIA_ROOT by appending something like this to your URLconf: from django.conf import settings from django.views.static import serve # ... the rest of your URLconf goes here ... if settings.DEBUG: urlpatterns += [ url(r'^media/(?P