python - Django Error passing URL argument from Template to View: NoReverseMatch Reverse not found. 1 pattern(s) tried -

i trying pass configure url so:

/details/12345 

template html:

    <div class="row">     {% if article_list %}     {% article in article_list %}     <div>       <h2>{{ article.title }}</h2>       <p>{{ article.body }}</p>       <p><a class="btn btn-default" href="{% url 'details' article.id %}" role="button">view details &raquo;</a></p>     </div><!--/.col-xs-6.col-lg-4-->     {% endfor %}     {% endif %}   </div><!--/row--> 

urls.py (full):

    django.conf import settings django.conf.urls import include, url django.conf.urls.static import static django.contrib import admin  urlpatterns = [     url(r'^admin/', include(admin.site.urls)),     url(r'^$', 'news_readr.views.home', name='home'),     url(r'^details/(?p<article_id>\d+)/$', 'news_readr.views.details', name='details'), ] + static(settings.static_url, document_root=settings.static_root)  if settings.debug:     urlpatterns += static(settings.static_url, document_root=settings.static_root)     urlpatterns += static(settings.media_url, document_root=settings.media_root) 

views.py:

from django.shortcuts import render .models import article  # create views here. def home(request):     title = "home"     article_list = article.objects.all()     article in article_list:         print(article.id)     context = {                "title": title,                "article_list": article_list,                }     return render(request, "home.html", context)  def details(request, article_id = "1"):     article = article.objects.get(id=article_id)     return render(request, "details.html", {'article': article}) 

i getting error says:

 noreversematch @ /  reverse 'details' arguments '()' , keyword arguments '{}' not found. 1 pattern(s) tried: ['details/(?p<article_id>\\d+)/$'] 

i'm 1 week old @ django, , think there's wrong url named group config. please help! tia!

update: if remove url config , change to:

url(r'^details/$', 'news_readr.views.details', name='details'),

the error changes to:

reverse 'details' arguments '(1,)' , keyword arguments '{}' not found. 1 pattern(s) tried: ['details/$']

so seems picking argument passed 1 in case. seems issue regular expression. tried expression out @ pythex, there, expression doesn't seem matching anything.

for url pattern

url(r'^details/(?p<article_id>\d+)/$', 'news_readr.views.details', name='details'), 

the correct way use tag

{% url 'details' article.id %} 

this because details url pattern has group article_id, have pass tag.

if have above url pattern, , {{ article.id}} displays correctly in template, above template tag should not give error reverse 'details' arguments '()'. suggests have not updated code, or have not restarted server after changing code.

if change url pattern

url(r'^details/$', 'news_readr.views.details', name='details') 

then need remove article.id url tag.

{% url 'details' %}