network_inventory/network_inventory/inventory/views.py

from django.shortcuts import get_object_or_404, render
from django.views.generic import ListView
from guardian.shortcuts import get_objects_for_user
from inventory.models import (Device, Computer, ComputerRamRelation,
                     ComputerDiskRelation,
                     ComputerCpuRelation, Customer)


def device_details(request, device_id):
        device = get_object_or_404(Device, pk=device_id)
        return render(request, 'inventory/device_details.html',
                      {'device': device})


def computer_details(request, computer_id):
        computer = get_object_or_404(Computer, pk=computer_id)
        disks_list = ComputerDiskRelation.objects.filter(computer=computer_id)
        ram = ComputerRamRelation.objects.get(computer=computer_id)
        cpu = ComputerCpuRelation.objects.get(computer=computer_id)
        return render(request, 'inventory/computer_details.html',
                      {'computer': computer,
                       'disks_list': disks_list,
                       'ram': ram,
                       'cpu': cpu})


class CustomerList(ListView):
    model = Customer
    template_name = 'inventory/customer_list.html'


class ComputerList(ListView):
    model = Computer
    template_name = 'inventory/computer_list.html'

    def get_queryset(self):
        queryset = get_objects_for_user(self.request.user, 'inventory.view_computer', klass=Computer)
        #return super().get_queryset()
        return queryset


class DeviceList(ListView):
    model = Device
    context_object_name = 'device_list'
    template_name = 'inventory/device_list.html'