Robert Goodman

<a href="{% url "post" news.id %}"  >
                     <div class="categories">{{ news.title }}</div>
                        <h5>{{ news.text| linebreaks|truncatechars:200 }}</h5>
               </a>

class Product(models.Model):
    amount = models.IntegerField(default=0, verbose_name='Количество товара')

<form method="post" action="{% url 'addtoshopcart' product_single.id %}">
                        {% csrf_token %}
                        <div class="quantity">
                            <p>Quantity</p>
                            <div class="pro-qty"><input type="number" value="1" name="quantity" min="1" max="{{ product_single.amount }}"></div>
                        </div>
                        <button type="submit"   {% if product_single.amount < 1  %} disabled {% endif %} class="site-btn">Add to Cart</button>
                    </form>

from django.db import models
from django.contrib.auth.models import User
class Video(models.Model):
         likes = models.ManyToManyField(User, blank=True, related_name='likes')
         dislikes = models.ManyToManyField(User, blank=True, related_name='dislikes')

from django.shortcuts import render
from django.contrib.auth.mixins import LoginRequiredMixin
from .models import  Video
from django.views import View
from django.http import HttpResponseRedirect
from django.urls import revers

class AddLike(LoginRequiredMixin, View):

    def post(self, request, pk, *args, **kwargs):
        post = Video.objects.get(pk=pk)

        is_dislike = False

        for dislike in post.dislikes.all():
            if dislike == request.user:
                is_dislike = True
                break


        if is_dislike:
            post.dislikes.remove(request.user)

        is_like = False

        for like in post.likes.all():
            if like == request.user:
                is_like = True
                break

        if not is_like:
            post.likes.add(request.user)

        if is_like:
            post.likes.remove(request.user)

        return HttpResponseRedirect(reverse('video', args=[str(pk)]))



class AddDislike(LoginRequiredMixin, View):

    def post(self, request, pk, *args, **kwargs):
        post = Video.objects.get(pk=pk)

        is_like = False

        for like in post.likes.all():
            if like == request.user:
                is_like = True
                break

        if is_like:
            post.likes.remove(request.user)



        is_dislike = False

        for dislike in post.dislikes.all():
            if dislike == request.user:
                is_dislike = True
                break

        if not is_dislike:
            post.dislikes.add(request.user)

        if is_dislike:
            post.dislikes.remove(request.user)

        return HttpResponseRedirect(reverse('video', args=[str(pk)]))

from django.urls import path
from . import views


urlpatterns = [
    path('<int:pk>/like/', AddLike.as_view(), name='like'),
    path('<int:pk>/dislike/', AddDislike.as_view(), name='dislike')
]

<form method="post" action="{% url 'like' video.pk %}">
              {% csrf_token %}
              <div style="margin-top: 10px; width: 30px; height: 30px; margin-left: 950px;">
                  <input type="hidden" name="text" value="{{ request.path }}">
                  <button style="background: transparent; border: none; box-shadow: none;" type="submit">
                      <img src="{% static 'images/like.png' %}">
                      <span>{{ video.likes.all.count }}</span>
                  </button>
              </div>

          </form>


           <form method="post" action="{% url 'dislike' video.pk %}">
              {% csrf_token %}
              <div style="margin-top: -30px; width: 30px; height: 30px; margin-left: 980px;">
                  <input type="hidden" name="text" value="{{ request.path }}">
                  <button style="background: transparent; border: none; box-shadow: none;" type="submit">
                     <img src="{% static 'images/dislike.png' %}">
                      <span>{{ video.dislikes.all.count }}</span>
                  </button>
              </div>
           </form>