Count and length in Texas

Question

Hello, everybody. I have a Django project and one of its features is to generate statistical numbers. For example: I have an employee model and it has boolean fields, like, whether it is active or not, present or not, etc. So I want to show in the template a card containing the total number of registered employees and how many of these are active and on a given day how many were present, etc. That is, the quantity will be shown according to the state of the object, whether true or false. Check out an example model: py.models

class Funcionario(models.Model):
    nome = ...
    ativo = models.BooleanField()
    ...

py views.

from .models import Funcionario

class IndexView(TemplateView): # TemplateView mesmo
    template_name = 'index.html'

    def get_context_data(self, **kwargs):
        context = super().get_context_data(**kwargs)
        context['funcionarios'] = Funcionario.objects.all()
        return context

I know it’s easy to show the total in the template using {{ functionalities.Count }} or {{ functionalities|length }}. But I still don’t really understand the difference between the two modes. However, my question is about how to show the number of active and inactive employees. Some alternatives I thought was to create several keys in def get_context_data:

def get_context_data(self, **kwargs):
    context = super().get_context_data(**kwargs)
    context['funcionarios'] = Funcionario.objects.all()
    context['funcionarios_ativos'] = Funcionario.objects.filter(ativo=True)
    context['funcionarios_inativos'] = Funcionario.objects.filter(ativo=False)
    ...

    return context

Or you could create @propety in the Funcio model; or you could create custom tags. Finally, I would like an opinion on what would be the most appropriate way to do this.

Thank you in advance.