metaservice/tickets/views/list_lists.py

from django.contrib import messages
from django.contrib.auth.decorators import login_required, user_passes_test
from django.http import HttpResponse
from django.shortcuts import render
from django.db.models import Count

from django.contrib.auth.models import Group, Permission
from django.contrib.contenttypes.models import ContentType
from tickets.forms import SearchForm
from tickets.models import *
from tickets.utils import staff_check
from tickets.admin_utils import add_default_tickets_list

@login_required
@user_passes_test(staff_check)
def list_lists(request) -> HttpResponse:
    searchform = SearchForm(auto_id=False)
    add_default_tickets_list(request)
    # Make sure user belongs to at least one group.
    if not request.user.groups.all().exists():
        messages.warning(
            request,
            "You do not yet belong to any groups. Ask your administrator to add you to one.",
        )

    # Get info about Lists
    lists = TaskList.objects.select_related("group").order_by("group__name", "name")
    if not request.user.is_superuser:
        lists = lists.filter(group__in=request.user.groups.all())
    lists = lists.annotate(ticket_count=Count("task"))

    # Get info about Tickets
    tickets = Task.objects.filter(task_list__in=lists)

    context = {
        "lists": lists,
        "ticket_count": len(tickets),
        "list_count": len(lists),
        "searchform": searchform
    }

    return render(request, "tickets/list_lists.html", context)