Return 400 instead when taxonomy absent

django/website/rest_api/tests/delete_all_terms_tests.py

@@ -60,5 +60,5 @@ def test_error_when_taxonomy_does_not_exist(item, term):
     categorize_item(item, term)
     response = remove_categories_from_item(item, 'provinces-of-liberia')
 
-    assert response.status_code == status.HTTP_404_NOT_FOUND
-    assert response.data['detail'] == "Taxonomy matching query does not exist."
+    assert response.status_code == status.HTTP_400_BAD_REQUEST
+    assert response.data['detail'] == "Taxonomy with slug 'provinces-of-liberia' does not exist."

django/website/rest_api/views.py

@@ -104,8 +104,12 @@ class ItemViewSet(viewsets.ModelViewSet, BulkDestroyModelMixin):
         try:
             taxonomy = Taxonomy.objects.get(slug=taxonomy_slug)
         except Taxonomy.DoesNotExist as e:
-            data = {'detail': e.message}
-            return Response(data, status=status.HTTP_404_NOT_FOUND)
+            message = _("Taxonomy with slug '%s' does not exist.") % (
+                taxonomy_slug,
+            )
+
+            data = {'detail': message}
+            return Response(data, status=status.HTTP_400_BAD_REQUEST)
 
         item.delete_all_terms(taxonomy)