Add reddit / hacker news style votes in Class Based Views

I would like to add something similar to the voting system that many web pages have like StackOverflow, Reddit, Hacker News, etc. I wanted to create a button to do this task in the main template that I have, trying to create a FormView but I realize that maybe it does not work, because I'm using a ModelForm that does not have the field vote that has the model because it grabs it by default.

template

{% for new in News %}
    <li class="list-group-item">
       <form action="{% url 'New:vote' %} new.id" method="POST">
           <input type="submit" value="upvote">
           {{ new.vote }}
       </form>
        <a href="{{ new.url }}">{{ new.title }}</a>
    </li>
{% endfor %}

deal with this view

class NewVote(FormView):
    form_class = 'NewForm'

def get_success_url(self):
    return reverse_lazy('New:list', args=(self.object.id, ))

and I have these url, currently in the list, which is the main page, is giving me an error

  

Reverse for 'vote' with no arguments not found. 1 pattern (s) tried: ['vote / (? P \ d +) / $']

url(r'^$', NewList.as_view(), name='list'),
url(r'^add/', NewAdd.as_view(), name='add'),
url(r'^edit/(?P<pk>\d+)/$', NewEdit.as_view(), name='edit'),
url(r'^detail/(?P<pk>\d+)/$', NewDetail.as_view(), name='detail'),
url(r'^vote/(?P<pk>\d+)/$', NewVote.as_view(), name='vote'),

And this is my form where I had thought to add the field for the button, but honestly I do not know if it is the right thing to do it

class NewForm(ModelForm):

    error_message = {
        'url_exists': 'The url alredy exists'
    }

    class Meta:
        model = New
        fields = ('title', 'url')
        widgets = {
            'title': forms.TextInput(attrs={'class': 'form-control'}),
            'url': forms.TextInput(attrs={'class': 'form-control'})
        }

    def clean(self):
        cleaned_data = super(NewForm, self).clean()
        print(cleaned_data)

    def clean_url(self):
        url = self.cleaned_data['url'] 
        if New.objects.filter(url=url).exists():
            raise forms.ValidationError('The URL alredy exists')
        return url

Maybe I can create a new form, but would it be from a ModelForm or can I access it in a different way?

It's a long post, but I hope someone can help me.