Django 2.0 path error ?: (2_0.W001) has a route that contains '(?P<', begins with a '^', or ends with a '$'
I'm new to Django and am trying to create the back end code for a music application on my website.
I have created the correct view in my views.py file (in the correct directory) as shown below:
def detail(request, album_id):
return HttpResponse("<h1>Details for Album ID:" + str(album_id) + "</h1>")
however, when creating the url or path for this (shown below)
#/music/71/ (pk)
path(r'^(?P<album_id>[0-9])/$', views.detail, name='detail'),
I am experiencing a warning on my terminal stating:
?: (2_0.W001) Your URL pattern '^(?P<album_id>[0-9])/$' [name='detail'] has a route that contains '(?P<', begins with a '^', or ends with a '$'. This was likely an oversight when migrating to django.urls.path().
and whenever the /music/ (for which the path works) is followed by a number, such as /music/1 (which is what I want to be able to do) the page cannot be found and the terminal gives the above warning.
It may be a simple error and just me being stupid but I'm new to Django and python regex statements, so any help is appreciated.
Answer
The new path() syntax in Django 2.0 does not use regular expressions. You want something like:
path('<int:album_id>/', views.detail, name='detail'),
If you want to use a regular expression, you can use re_path().
re_path(r'^(?P<album_id>[0-9])/$', views.detail, name='detail'),
The old url() still works and is now an alias to re_path, but it is likely to be deprecated in future.
url(r'^(?P<album_id>[0-9])/$', views.detail, name='detail'),