fix DeleteView classes for django v4 (#1922)

isatemplates/views.py

@@ -203,8 +203,9 @@ class ISATemplateDeleteView(
     slug_field = 'sodar_uuid'
     template_name = 'isatemplates/template_confirm_delete.html'
 
-    def get_success_url(self):
-        return self.handle_modify(self.object, 'delete')
+    def form_valid(self, form):
+        self.object.delete()
+        return redirect(self.handle_modify(self.object, 'delete'))
 
 
 class ISATemplateExportView(LoggedInPermissionMixin, View):

samplesheets/views.py

@@ -2326,21 +2326,16 @@ class IrodsAccessTicketDeleteView(
     slug_url_kwarg = 'irodsaccessticket'
     slug_field = 'sodar_uuid'
 
-    def get_success_url(self):
-        return reverse(
-            'samplesheets:irods_tickets',
-            kwargs={'project': self.object.get_project().sodar_uuid},
-        )
-
-    def delete(self, request, *args, **kwargs):
+    def form_valid(self, form):
         obj = self.get_object()
         irods_backend = get_backend_api('omics_irods')
         try:
             with irods_backend.get_session() as irods:
                 irods_backend.delete_ticket(irods, obj.ticket)
         except Exception as ex:
             messages.error(
-                request, 'Error deleting iRODS access ticket: {}'.format(ex)
+                self.request,
+                'Error deleting iRODS access ticket: {}'.format(ex),
             )
             return redirect(
                 reverse(
@@ -2349,12 +2344,18 @@ def delete(self, request, *args, **kwargs):
                 )
             )
         self.add_tl_event(obj, 'delete')
-        self.create_app_alerts(obj, 'delete', request.user)
+        self.create_app_alerts(obj, 'delete', self.request.user)
+        obj.delete()
         messages.success(
-            request,
+            self.request,
             'iRODS access ticket "{}" deleted.'.format(obj.get_display_name()),
         )
-        return super().delete(request, *args, **kwargs)
+        return redirect(
+            reverse(
+                'samplesheets:irods_tickets',
+                kwargs={'project': self.object.get_project().sodar_uuid},
+            )
+        )
 
 
 class IrodsDataRequestListView(