Why is data not updating in django templates?

Question

Django

There is a page that displays data: the sum of a column from one table using an aggregator. After adding data to the database, there are no changes on the page, changes will only occur after the project is reloaded. django template engine.

#view.py
from .model import Video as video
def static_index(request):
    sum = video.objects.aggregate(Sum('chanters'))  
    return render(request, 'index.html',{
'sum': sum
                                         })
#index.html
{{ sum }}

#model.py
class Video(models.Model):
    owner = models.ForeignKey(User, default='1')
    video = models.CharField(max_length=250, unique=True)

Answer 1

{{ sum }} replace with {{ sumchanters }} in index