I have a project called 'my_project' and within that project I have an app called 'my_app' so I have two urls.py files. All of my url's for my_app are located within it's urls.py file and work correctly, except one. That one is 'download_file'. My site works when this is included in my_project's urls.py, but when it's in my_app's urls.py I get a NoReverseMatch error on page load.
I don't know why this url only works when it's located in my main projects url's folder. I suspect it has something to do with the regex, though I can't figure it out.
The user would be on this page:
http://127.0.0.1:8000/user_area/username/classes
then click the 'download' link:
<a href="{% url 'download_file' file_path=item.instance.user_file %}" target='_blank'>{{ item.instance.filename }}</a>
my_project.py
urlpatterns = [
# reference to my_app
re_path(r'^user_area/(?P<username>[\w-]+)/', include('my_app.urls')),
]
# this works
url(r'^download_file/(?P<file_path>(.+)\/([^/]+))$', users_views.DownloadFile.as_view(), name='download_file'),
]
my_app.py
urlpatterns = [
path('classes', views.classes, name='classes'),
# if I remove the url from my_project.py this one returns NoReverseMatch on page load
url(r'^download_file/(?P<file_path>(.+)\/([^/]+))$', users_views.DownloadFile.as_view(), name='download_file'),
Thank you.
The problem is occurring because your URL template tag is providing only one parameter: file_path.
This works when the URL is declared in your project urls.py, because only one parameter is needed.
When you try to use the URL in my_app.urls, you need to also provide the username parameter. You will need to use something like:
<a href="{% url 'download_file' username=request.user.username file_path=item.instance.user_file %}" target='_blank'>{{ item.instance.filename }}</a>
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