Sqlite does not support order by in subqueries

apps/api/urls.py

@@ -51,7 +51,10 @@ class UserViewSet(ReadProtectedModelViewSet):
     filterset_fields = ['id', 'username', 'first_name', 'last_name', 'email', 'is_superuser', 'is_staff', 'is_active', ]
 
     def get_queryset(self):
-        queryset = super().get_queryset().order_by("username")
+        queryset = super().get_queryset()
+        # Sqlite doesn't support ORDER BY in subqueries
+        queryset = queryset.order_by("username") \
+            if settings.DATABASES[queryset.db]["ENGINE"] == 'django.db.backends.postgresql' else queryset
 
         if "search" in self.request.GET:
             pattern = self.request.GET["search"]
@@ -87,6 +90,9 @@ class UserViewSet(ReadProtectedModelViewSet):
                 ),
                 all=True)
 
+        queryset = queryset if settings.DATABASES[queryset.db]["ENGINE"] == 'django.db.backends.postgresql' \
+            else queryset.order_by("username")
+
         return queryset
 
 

apps/note/api/views.py

 # Copyright (C) 2018-2020 by BDE ENS Paris-Saclay
 # SPDX-License-Identifier: GPL-3.0-or-later
-
+from django.conf import settings
 from django.db.models import Q
 from django.core.exceptions import ValidationError
 from django_filters.rest_framework import DjangoFilterBackend
@@ -117,6 +117,9 @@ class ConsumerViewSet(ReadOnlyProtectedModelViewSet):
         """
 
         queryset = super().get_queryset()
+        # Sqlite doesn't support ORDER BY in subqueries
+        queryset = queryset.order_by("username") \
+            if settings.DATABASES[queryset.db]["ENGINE"] == 'django.db.backends.postgresql' else queryset
 
         alias = self.request.query_params.get("alias", ".*")
         queryset = queryset.prefetch_related('note')
@@ -137,7 +140,7 @@ class ConsumerViewSet(ReadOnlyProtectedModelViewSet):
             ),
             all=True)
 
-        return queryset.order_by('name').distinct()
+        return queryset.distinct()
 
 
 class TemplateCategoryViewSet(ReadProtectedModelViewSet):