如何在django中显示所列项目的总和？

from django.db.models import Sum
from myapp.models import MyModel

# 假设MyModel有一个名为value的字段
total = MyModel.objects.aggregate(total_value=Sum('value'))['total_value']

from django.shortcuts import render
from myapp.models import MyModel

def my_view(request):
    items = MyModel.objects.all()
    total = sum(item.value for item in items)
    return render(request, 'my_template.html', {'total': total})

{% for item in items %}
    {{ item.value }}
{% endfor %}
Total: {{ items|length }}

from django.db.models import Sum, Value
from django.db.models.functions import Coalesce

total = MyModel.objects.aggregate(total_value=Coalesce(Sum('value'), Value(0)))['total_value']