gas/gas/core/views.py

@@ -19,14 +19,14 @@ class GASLoginView(LoginView):
     def get_context_data(self, **kwargs):
         ctx = super().get_context_data(**kwargs)
         css = gas_settings.MEDIA['css']
-        javascript = gas_settings.MEDIA['js']
+        js = gas_settings.MEDIA['js']
         if gas_settings.EXTRA_MEDIA:
             css = css + gas_settings.EXTRA_MEDIA.get('css', [])
-            javascript = javascript + gas_settings.EXTRA_MEDIA.get('js', [])
+            js = js + gas_settings.EXTRA_MEDIA.get('js', [])
         ctx.update({
             'logo_static_url': gas_settings.LOGO,
             'css': css,
-            'js': javascript,
+            'js': js,
         })
         return ctx
 

gas/gas/users/urls.py

@@ -7,9 +7,6 @@ urlpatterns = [
     path('', views.UserList.as_view(), name="user_list"),
     path('create/', views.CreateUser.as_view(), name="user_create"),
     path('<int:pk>/edit/', views.UpdateUser.as_view(), name="user_update"),
-    path(
-        '<int:pk>/change-password/',
-        views.ChangePasswordUser.as_view(),
-        name="user_change_password"),
+    path('<int:pk>/change-password/', views.ChangePasswordUser.as_view(), name="user_change_password"),
     path('<int:pk>/delete/', views.DeleteUser.as_view(), name="user_delete"),
 ]

gas/sites.py

@@ -10,7 +10,7 @@ class Entry:
         self.icon = icon
         self.url = url
         self.roles = roles
-        self.children = {}
+        self.children = dict()
         self.parent = parent
         self.order = order if order is not None else float("inf")
 
@@ -20,7 +20,7 @@ class Entry:
         return super().__lt__(other)
 
 
-class GASSite:
+class GASSite(object):
     base_role = 'admins'
 
     def __init__(self):
@@ -42,12 +42,12 @@ class GASSite:
             exposed when gas is not active.
         """
         if prefix in self._registry['urls']:
-            raise ImproperlyConfigured(f"Prefix {prefix} already in use")
+            raise ImproperlyConfigured("Prefix {0} already in use".format(prefix))
         self._registry['urls'][prefix] = urls
 
     def register_menu(self, name, label, url=None, icon=None, roles=None, parent=None, order=None):
         if name in self._registry['menu']:
-            raise ImproperlyConfigured(f"Menu entry '{name}' already registered.")
+            raise ImproperlyConfigured("Menu entry '{0}' already registered.".format(name))
 
         if roles is None:
             roles = set()
@@ -61,8 +61,8 @@ class GASSite:
         if parent:
             try:
                 parent_entry = self._registry['menu'][parent]
-            except KeyError as exc:
-                raise ImproperlyConfigured("Parent {parent} not registered.") from exc
+            except KeyError:
+                raise ImproperlyConfigured("Parent {} not registered.".format(parent))
             parent_entry.children[name] = entry
 
         self._registry['menu'][name] = entry
@@ -86,7 +86,7 @@ class GASSite:
         for prefix, urls in self._registry['urls'].items():
             if prefix:
                 urlpatterns.append(
-                    re_path(r'^{prefix}/', include(urls)),
+                    re_path(r'^{0}/'.format(prefix), include(urls)),
                 )
             else:
                 urlpatterns.append(

gas/utils.py

@@ -6,13 +6,13 @@ from django.utils.functional import Promise
 
 
 class JSONEncoder(json.JSONEncoder):
-    def default(self, o):
-        if isinstance(o, datetime.datetime):
-            return o.strftime('%Y-%m-%d %H:%M')
-        if isinstance(o, datetime.date):
-            return o.strftime('%Y-%m-%d')
-        if isinstance(o, QuerySet):
-            return list(o)
-        if isinstance(o, Promise):
-            return str(o)
-        return json.JSONEncoder.default(self, o)
+    def default(self, obj):
+        if isinstance(obj, datetime.datetime):
+            return obj.strftime('%Y-%m-%d %H:%M')
+        if isinstance(obj, datetime.date):
+            return obj.strftime('%Y-%m-%d')
+        if isinstance(obj, QuerySet):
+            return list(obj)
+        if isinstance(obj, Promise):
+            return str(obj)
+        return json.JSONEncoder.default(self, obj)

gas/views.py

@@ -1,10 +1,11 @@
+import json
+
 from django.contrib import messages
 from django.contrib.admin.utils import NestedObjects
 from django.core.exceptions import ImproperlyConfigured
 from django.db import router
-from django.http import HttpResponse, HttpResponseRedirect, HttpResponseBadRequest, JsonResponse
+from django.http import HttpResponse, HttpResponseRedirect, HttpResponseBadRequest
 from django.urls import reverse
-from django.utils.cache import add_never_cache_headers
 from django.utils.html import escape, escapejs
 from django.utils.text import capfirst
 from django.utils.translation import gettext_lazy as _
@@ -43,26 +44,30 @@ class AjaxCommandsMixin:
     """
     def post(self, request, *args, **kwargs):
         if 'command' in self.request.POST:
-            command = self.request.POST['command']
-            command_processor = getattr(self, f'do_{command}', None)
+            command_processor = getattr(self, 'do_{0}'.format(self.request.POST['command']), None)
             if command_processor is not None:
                 return command_processor()
-            return HttpResponseBadRequest()
-        handler = getattr(super(), 'post', self.http_method_not_allowed)
-        return handler(request, *args, **kwargs)
+            else:
+                return HttpResponseBadRequest()
+        else:
+            handler = getattr(super(), 'post', self.http_method_not_allowed)
+            return handler(request, *args, **kwargs)
 
     def get(self, request, *args, **kwargs):
         if 'command' in self.request.GET:
-            command = self.request.POST['command']
-            command_processor = getattr(self, f'send_{command}', None)
+            command_processor = getattr(self, 'send_{0}'.format(self.request.GET['command']), None)
             if command_processor is not None:
                 return command_processor()
-            return HttpResponseBadRequest()
-        handler = getattr(super(), 'get', self.http_method_not_allowed)
-        return handler(request, *args, **kwargs)
+            else:
+                return HttpResponseBadRequest()
+        else:
+            handler = getattr(super(), 'get', self.http_method_not_allowed)
+            return handler(request, *args, **kwargs)
 
     def render_json(self, data, encoder=utils.JSONEncoder):
-        return JsonResponse(data, json_dumps_params={"indent": 2}, encoder=encoder)
+        return HttpResponse(
+            json.dumps(data, indent=2, cls=encoder),
+            content_type='application/json')
 
 
 class GASMixin:
@@ -92,10 +97,7 @@ class GASMixin:
 
     def dispatch(self, *args, **kwargs):
         if self.check_user_forbidden():
-            path = self.request.path
-            response = HttpResponseRedirect(reverse('gas:login') + f'?next={path}')
-            add_never_cache_headers(response)
-            return response
+            return HttpResponseRedirect(reverse('gas:login') + '?next={}'.format(self.request.path))
         return super().dispatch(*args, **kwargs)
 
     def form_valid(self, form):
@@ -117,14 +119,16 @@ class GASMixin:
             # Forcing possible reverse_lazy evaluation
             url = str(self.cancel_url)
             return url
-        return self.get_success_url()
+        else:
+            return self.get_success_url()
 
     def get_continue_url(self):
         if self.continue_url:
             # Forcing possible reverse_lazy evaluation
             url = str(self.continue_url)
             return url
-        raise ImproperlyConfigured("No URL to redirect to. Provide a continue_url.")
+        else:
+            raise ImproperlyConfigured("No URL to redirect to. Provide a continue_url.")
 
     def get_header_title(self):
         " Contents for the <title> tag. "
@@ -148,10 +152,10 @@ class GASMixin:
     def get_context_data(self, **kwargs):
         ctx = super().get_context_data(**kwargs)
         css = gas_settings.MEDIA['css']
-        javascript = gas_settings.MEDIA['js']
+        js = gas_settings.MEDIA['js']
         if gas_settings.EXTRA_MEDIA:
             css = css + gas_settings.EXTRA_MEDIA.get('css', [])
-            javascript = javascript + gas_settings.EXTRA_MEDIA.get('js', [])
+            js = js + gas_settings.EXTRA_MEDIA.get('js', [])
         ctx.update({
             'base_template': self.base_template,
             'home_url': self.get_home_url(),
@@ -163,7 +167,7 @@ class GASMixin:
             'gas_title': gas_settings.TITLE,
             'logo_static_url': gas_settings.LOGO,
             'css': css,
-            'js': javascript,
+            'js': js,
         })
         return ctx
 
@@ -182,7 +186,8 @@ class GASListView(GASMixin, ListView):
         self.filter_form = self.get_filter_form()
         if self.filter_form is not None and self.filter_form.is_valid():
             return self.filter_form.filter(qs)
-        return qs
+        else:
+            return qs
 
     def get_queryset(self):
         qs = super().get_queryset()
@@ -211,16 +216,13 @@ class GASCreateView(GASMixin, CreateView):
     def form_valid(self, form):
         response = super().form_valid(form)
         if '_popup' in self.request.POST:
-            # escape() calls force_text.
-            obj_pk = escape(self.object.pk)
-            obj = escapejs(self.object)
             return HttpResponse(
                 '<!DOCTYPE html><html><head><title></title></head><body>'
-                '<script type="text/javascript">'
-                f'    opener.dismissAddAnotherPopup(window, "{obj_pk}", "{obj}");'
-                '</script></body></html>'
-            )
-        return response
+                '<script type="text/javascript">opener.dismissAddAnotherPopup(window, "%s", "%s");</script></body></html>' %
+                # escape() calls force_text.
+                (escape(self.object.pk), escapejs(self.object)))
+        else:
+            return response
 
 
 class GASUpdateView(GASMixin, UpdateView):
@@ -253,14 +255,10 @@ class GASDeleteView(GASMixin, DeleteView):
 
         def format_callback(obj):
             opts = obj._meta
-            name = capfirst(opts.verbose_name)
-            return f'{name}: {obj}'
+            return '%s: %s' % (capfirst(opts.verbose_name), obj)
 
         collector.collect([self.object])
-        model_count = {
-            model._meta.verbose_name_plural: len(objs)
-            for model, objs in collector.model_objs.items()
-        }
+        model_count = {model._meta.verbose_name_plural: len(objs) for model, objs in collector.model_objs.items()}
         return collector.nested(format_callback), model_count
 
     def get_context_data(self, **kwargs):
@@ -280,7 +278,7 @@ class GASDeleteView(GASMixin, DeleteView):
         })
         return ctx
 
-    def form_valid(self, form):
-        response = super().form_valid(form)
-        messages.add_message(self.request, messages.SUCCESS, self.get_deleted_text())
+    def delete(self, request, *args, **kwargs):
+        response = super().delete(request, *args, **kwargs)
+        messages.add_message(request, messages.SUCCESS, self.get_deleted_text())
         return response

requirements.txt

@@ -1 +1 @@
-Django>=3.2.13,<5.0
+Django==3.2.13