NoReverseMatch for Django and DjangoCMS App-CodePudding

I am trying to set up some URLs for tags and categories on a forum. The links look like this

<a href="{% url 'article-list-by-tag' %}{{ tag }}"  >{{ tag }}</a>

The URL pattern article-list-by-tag comes from a DjangoCMS app called AldrynNewsblog. It can be found HERE and looks like this

url(r'^tag/(?P<tag>\w[-\w]*)/',
    TagArticleList.as_view(), name='article-list-by-tag'),

Note that the NewsBlog does not have app_name declared in its urls.py.

The app itself is part of a larger Django app called DjangoCMS. The url entry-point for the latter is declared in project's main urls.py as follows:

path('', include('cms.urls')),

The error that I am getting is

Reverse for 'article-list-by-tag' not found. 'article-list-by-tag' is not a valid view function or pattern name.

What should I do to resolve this? I have tried adding namespace to various URL entries as well as app_name to NewsBlog to no avail. The Django version being used is 2.1

CodePudding user response：

You need to pass the .slug of the tag as parameter of the URL, so:

<a href="{% url 'article-list-by-tag' tag=tag.slug %}"  >{{ tag }}</a>

If you import it with a namespace, you need to prefix the name of the view with that prefix, so 'some_namespace:article-list-by-tag'.

CodePudding user response：

In case it helps anyone, the following code worked for my use-case:

<a href="{% namespace_url 'article-list-by-tag' tag=tag.slug %}" >{{ tag }}</a>

Where the namespace_url is a template tag provided by DjangoCMS.