From 26b0eefa3a6b507f39b2c560875649961393db33 Mon Sep 17 00:00:00 2001
From: Shaheed Haque <srhaque@theiet.org>
Date: Sat, 24 Nov 2018 12:49:26 +0000
Subject: [PATCH] Restore compatibility with current versions of extra-views
 (issue #367).

---
 polymorphic/contrib/extra_views.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/polymorphic/contrib/extra_views.py b/polymorphic/contrib/extra_views.py
index c84ea6a..50e9189 100644
--- a/polymorphic/contrib/extra_views.py
+++ b/polymorphic/contrib/extra_views.py
@@ -25,7 +25,7 @@ class PolymorphicFormSetMixin(object):
     formset_class = BasePolymorphicModelFormSet
 
     #: Default 0 extra forms
-    extra = 0
+    factory_kwargs = {'extra': 0}
 
     #: Define the children
     # :type: list[PolymorphicFormSetChild]
@@ -96,7 +96,7 @@ class PolymorphicInlineFormSetView(PolymorphicFormSetMixin, extra_views.InlineFo
     formset_class = BasePolymorphicInlineFormSet
 
 
-class PolymorphicInlineFormSet(PolymorphicFormSetMixin, extra_views.InlineFormSet):
+class PolymorphicInlineFormSet(PolymorphicFormSetMixin, extra_views.InlineFormSetFactory):
     """
     An inline to add to the ``inlines`` of
     the :class:`~extra_views.advanced.CreateWithInlinesView`