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Kenil Vasani
Kenil Vasani

Kenil Vasani

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Asked: 2020-12-10T22:50:26+00:00 In:

Django 2.0 path error ?: (2_0.W001) has a route that contains ‘(?P<', begins with a '^', or ends with a '$'

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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.

djangodjango-urlsdjango-viewspythonpython-3.x
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    1. Kenil Vasani

      Kenil Vasani

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      Best 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'),
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