Django - is not a registered namespace

Question

I am trying to process a form in django/python using the following code.

---

home.html:

<form action="{% url 'home:submit' %}" method='post'> 

---

views.py:

def submit(request):     a = request.POST(['initial'])     return render(request, 'home/home.html', {         'error_message': "returned"     }) 

---

urls.py:

from django.conf.urls import url from . import views urlpatterns = [     url(r'^submit/$', views.submit, name='submit') ] 

when I try to run it in a browser I get the error:

NoReverseMatch at /home/ u'home' is not a registered namespace

and another error message indicating a problem with the form.

Answer 1

You should just change you action url in your template:

<form action="{% url 'submit' %} "method='post'> 

---

On the note of url namespaces...

In order to be able to call urls using home namespace you should have in your main urls.py file line something like:

for django 1.x:

url(r'^', include('home.urls', namespace='home')), 

for django 2.x and 3.x

path('', include(('home.urls', 'home'), namespace='home')) 

Answer 2

In your main project, open url.py first. Then check, there should be app_name declared at first. If it is not, declare it.

For example, my app name is user info which is declared in url.py

app_name = "userinfo"  urlpatterns = [     url(r'home/', views.home, name='home'),     url(r'register/', views.registration, name='register') ]