[Django]-Django: Reverse for 'detail' with arguments '('',)' and keyword arguments '{}' not found

My mistake was a typo on detail.html:

<form action={% url 'polls:vote' polls.id %}" method="post">

should have been

<form action={% url 'polls:vote' poll.id %}" method="post">

It took a while for me to realise the django traceback page was pointing me to the relevant line of code the whole time. :$

This happened to me when I was reading tutorial. I didn’t change poll_id to pk:

url(r'^(?P<poll_id>\d+)/$', views.DetailView.as_view(), name='detail'),

vs

url(r'^(?P<pk>\d+)/$', views.DetailView.as_view(), name='detail'),

I encountered this error when I was using a string as a raw value, rather than surrounding by quotes i.e.

{% url 'my_view' string_val %}

instead of

{% url 'my_view' 'string_val' %}

I struggled with this for a while. Then I noticed I had put poll.id and not Poll.id with a (capital P)

also, in

polls/urls.py

i had spelling error

url(r’^(?P[0-9]+)/$’, views.detail, name=’details‘),

vs the correct code

url(r’^(?P[0-9]+)/$’, views.detail, name=’detail’),

spent some time looking for the error, so look for proper spelling. lol

The error got sorted out for me after correcting the filter condition in views.py.

snippet of my views.py

def post_share(request, post_id):
        post = get_object_or_404(Post, id=post_id, status='Published')

snippet from my models.py

class Post(models.Model):
STATUS_CHOICES=(
                ('draft','Draft'),
                ('published','Published'),
                )

1st value is stored in the database and the second value is for displaying to the users.

raw data from my mysql DB

+---------------------------------------+-----------+
| title                                 | status    |
+---------------------------------------+-----------+
| Revolution 2020                       | published |
| harry potter and the sorcerer's stone | published |
| harry potter and the cursed child     | draft     |
| five point someone                    | published |
| half girlfriend                       | draft     |
| one night at the call center          | published |
| Django by example                     | published |
+---------------------------------------+-----------+

When I had used “published“, I was getting the said error. Once I changed the filter to “Published” it all sorted out.

Be careful with your primary key datatype. In my case, i mistakently used int instead str.

if pk is string,

 path('addesm/pending/<str:pk>', views.addesm, name='add ESM')