From 266b0acc65a7abca293c1f23e7ec21a246f7437e Mon Sep 17 00:00:00 2001
From: Rense VanderHoek <264562+rense@users.noreply.github.com>
Date: Thu, 18 Oct 2018 08:23:18 +0200
Subject: [PATCH] Django 2.1 compatability fix (#345)

Skips adding 'sortable_by' arg for Django versions < 2.1
---
 jet/utils.py | 17 +++++++++++++----
 1 file changed, 13 insertions(+), 4 deletions(-)

diff --git a/jet/utils.py b/jet/utils.py
index 65ccf0c8..31e72c38 100644
--- a/jet/utils.py
+++ b/jet/utils.py
@@ -216,12 +216,21 @@ def get_model_queryset(admin_site, model, request, preserved_filters=None):
 
     ChangeList = model_admin.get_changelist(request)
 
+    change_list_args = [
+        request, model, list_display, list_display_links, list_filter,
+        model_admin.date_hierarchy, search_fields, list_select_related,
+        model_admin.list_per_page, model_admin.list_max_show_all,
+        model_admin.list_editable, model_admin]
+
     try:
-        cl = ChangeList(
-            request, model, list_display, list_display_links, list_filter, model_admin.date_hierarchy, search_fields,
-            list_select_related, model_admin.list_per_page, model_admin.list_max_show_all, model_admin.list_editable,
-            model_admin)
+        sortable_by = model_admin.get_sortable_by(request)
+        change_list_args.append(sortable_by)
+    except AttributeError:
+        # django version < 2.1
+        pass
 
+    try:
+        cl = ChangeList(*change_list_args)
         queryset = cl.get_queryset(request)
     except IncorrectLookupParameters:
         pass