I've encountered a one nasty bug in my code while developing a personal blog in Django. Basically, I've changed my urls.py file by adding a couple of rules to make certain views accessible.
urls.py
from django.conf.urls import include, url
from django.contrib import admin
from blog import views
urlpatterns = [
# Examples:
# url(r'^$', 'blogas.views.home', name='home'),
# url(r'^blog/', include('blog.urls')),
url(r'^admin/', include(admin.site.urls)),
url(r'^$', views.index, name='index'),
url(r'^(?P<slug>\w+)', views.view_post, name='view_blog_post'),
url(r'^about/$', views.about, name='about'),
url(r'^posts/$', views.posts, name='posts'),
]
Everything seems to be working except when I try access http://127.0.0.1:8000/about or /posts, Django throws out a 404 error. What is the reason of this? I've defined both rules but the system seems not to recognize the pattern - maybe I've mispelled something? Maybe I know nothing about url formatting (could be, it's my first time doing this stuff)?
A big thanks from a newbie programmer to everyone who finds the bug :)
The url-patterns are processed from top to bottom. Your third pattern ^(?P<slug>\w+) consumes everything, so about and posts is never reached.
An example: Django wants to find the view for the url about/. The patterns ^admin/ and ^$ do not match. But ^(?P<slug>\w+) does, because about starts with letters or numbers (the character sets contained in \w)
>>> import re
>>> re.search('^(?P<slug>\w+)', 'about/')
<_sre.SRE_Match object at 0x10b5b7be8>
So Django found a match, callBs views.view_post and finishes the request. That means, the more specific rule must come first. Better: avoid ambiguity.
You have to change position of url(r'^(?P<slug>\w+)', views.view_post, name='view_blog_post'),.
urlpatterns = [
# Examples:
# url(r'^$', 'blogas.views.home', name='home'),
# url(r'^blog/', include('blog.urls')),
url(r'^admin/', include(admin.site.urls)),
url(r'^$', views.index, name='index'),
url(r'^about/$', views.about, name='about'),
url(r'^posts/$', views.posts, name='posts'),
url(r'^(?P<slug>\w+)', views.view_post, name='view_blog_post'),
]
urlpatterns is list and order of urls is important.
Related
So, I am not really lucky with latest django version tutorials, so I've had some problems with things that changed between some versions. One of this things is: althought I do exactly as I read/watch in the tutorials I always get the same result - all urls redirect to the same HTML page.
Here is my root urls.py
from django.conf.urls import url, include
from django.contrib import admin
urlpatterns = [
url(r'^admin/', admin.site.urls),
url(r'^', include('theblog.urls')),
]
Here is my app urls:
from django.conf.urls import url, include
from .views import HomeView, ArticleDetailView
urlpatterns = [
url('', HomeView.as_view(), name='home'),
url('^article/<int:pk>', ArticleDetailView.as_view(), name='article-detail'),
]
For example, when I go to localhost:8000/articles/1 (or any other pk), it renders home.html (HomeView class) as if it was localhost:8000/.
Hope you can help me. Thanks!
There are two things wrong with your code.
url('^article/<int:pk>', ArticleDetailView.as_view(), name='article-detail'),
This will not work. If you want to use url. you can't use <int:pk>, you need to use a RegEx:
url("article/([0-9]+)/", ArticleDetailView.as_view(), name="article-detail")
Note that this will be deprecated in the future and if you are using django >=2.0 you should use path:
path("article/<int:article>/", ArticleDetailView.as_view(), name="article-detail")
However this will still direct you to the wrong view. django stops after the first URL pattern match.
Switch them around to fix that:
urlpatterns = [
url("article/([0-9]+)/", ArticleDetailView.as_view(), name="article-detail"),
# path("article/<int:article>/", ArticleDetailView.as_view(), name="article-detail"), # alternative with path instead of url
url('', HomeView.as_view(), name='home')
]
It may be due to this line
url('', HomeView.as_view(), name='home'),
Because url wraps re_path there may be some logic which will treat the blank regex string as a wildcard. Try changing it to '/'
url('/', HomeView.as_view(), name='home'),
This should be an easy enough problem to solve for you guys:
I just started working with Django, and I'm doing some routing. This is my urls.py in the root of the project:
urlpatterns = [
path('admin/', admin.site.urls),
path('', include('dashboard.urls')),
]
This is the routing in my dashboard app:
urlpatterns = [
path('dashboard', views.index, name='index'),
path('', views.index, name='index'),
]
Now let's say I want my users to be redirected to /dashboard if they go to the root of the website. So I would use '' as a route in the urls.py in the root, and then have everyone sent to /dashboard from the urls.py in the dashboard app. But when I do this I get the following warning:
?: (urls.W002) Your URL pattern '/dashboard' [name='index'] has a route beginning with a '/'. Remove this slash as it is unnecessary. If this pattern is targeted in an include(), ensure the include() pattern has a trailing '/'.
So I tried to use '/' instead of '', but since a trailing / is automatically removed from an url, the url wouldn't match the pattern. Should I ignore/mute this warning or is there another way to go about it?
This is the code that worked perfectly but gave me a warning earlier:
urlpatterns = [
path('/dashboard', views.index, name='index'),
path('', views.index, name='index'),
]
urlpatterns = [
path('admin/', admin.site.urls),
path('', include('dashboard.urls'))
]
You can use RedirectView to redirect from / to /dashboard/. Then use 'dashboard' when including the dashboard urls.
urlpatterns = [
path('admin/', admin.site.urls),
path('', RedirectView.as_view(pattern_name='dashboard:index')
path('dashboard/', include('dashboard.urls')),
]
You can then remove 'dashboard' from the path in dashboard/urls.py, as it is already in the include().
app_name = 'dashboard'
urlpatterns = [
path('', views.index, name='index'),
]
I've added app_name='dashboard' to match the namespace used above in pattern_name='dashboard:index'.
Note that Django projects usually use URLs with a trailing slash, e.g. /dashboard/ instead of dashboard.
If you really want to use URLs like /dashboard without a trailing slash, then the include should be
path('dashboard', include('dashboard.urls')),
If you do this, I suggest you set APPEND_SLASH to False in your settings.
You can try something like this:
from django.conf import settings
from django.conf.urls import include, url
from django.contrib import admin
from django.views.generic import RedirectView
urlpatterns = [
url(r'^admin/', include(admin.site.urls)),
url(r'^contacts/', include('appname.contacts.urls')),
url(r'^comments/', include('appname.urls')),
url(r'^subscriptions/', include('appname.partner.urls')),
url(r'^', RedirectView.as_view(url="/admin/"))
]
This is what I've done in my project so whenever the user go to 127.0.0.1:8000 it redirects to /admin
Going to localhost/app works, but localhost/app/upload does not. Am I doing something really obviously wrong? I've tried a few different methods following the documentation without luck. I get a 404 saying the URL pattern does not match.
/project/app/urls.py
from app import views
urlpatterns = patterns('',
url(r'^$', views.view, name='result'),
url(r'^upload/$', views.upload, name='upload'),
)
/project/urls.py
urlpatterns = patterns('',
url(r'^admin/', include(admin.site.urls)),
url(r'^app/$', include('app.urls')),
)
Don't terminate the inclusion URL.
url(r'^app/', include('app.urls')),
I just started playing with Django, I love it! I followed the tutorial from the Django documentation, but have the following question:
I only have one app (polls), currently I always have localhost/polls/{urlname}
Is there a way to remove the polls keyword? So people that go to localhost automatically go to my app polls? At the moment, I have this wildcard
url(r'.*$', RedirectView.as_view(url='polls/', permanent=False), name='index'),
But this still keeps polls in the url. This is my complete urls.py file:
from django.conf.urls import patterns, include, url
from django.contrib import admin
urlpatterns = patterns('',
url(r'^polls/', include('polls.urls', namespace="polls")),
url(r'^admin/', include(admin.site.urls)),
url(r'.*$', RedirectView.as_view(url='polls/', permanent=False), name='index'),
)
Thanks in advance!
Just remove the polls/ prefix in the regex of the "include" url:
urlpatterns = patterns('',
url(r'^', include('polls.urls', namespace="polls")),
...
)
I'm new to Django and I currently have two problems that I can't figure out from reading online:
URLs... I have an app 'cq' and the project is 'mysite' here is what I have in mysite's urls.py
urlpatterns = [
url(r'^cq/', include('cq.urls')),
url(r'^admin/', include(admin.site.urls)),
]
and this is what I have in cq's urls.py
urlpatterns = [
url(r'^$', views.index, name='index'),
url(r'^(?P<team_id>[0-9]+)/$', views.team, name='team'),
]
However I don't want do to cq/team_id. I just want to be able to go directly to /team_id. Is there any way to do it?
I want an entry in the admin view of the database to look very custom, i.e. I want to write my own html.. How do I do it?
Thanks!
When you define
url(r'^cq/', include('cq.urls')),
it means all urls in cq.urls will have to start with cq/. For you case, just do
urlpatterns = [
url(r'^cq/', include('cq.urls')),
url(r'^admin/', include(admin.site.urls)),
url(r'^(?P<team_id>[0-9]+)$', views.team, name='team') #without trailing slash for /team_id, but with for /team_id/
]
Of course, you don't need this rule anymore in cq urls.py