From 290b740811c3fdb3eeb5aac35eb1476351d4f135 Mon Sep 17 00:00:00 2001
From: "Jens W. Klein" <jk@kleinundpartner.at>
Date: Tue, 1 Oct 2019 16:34:18 +0200
Subject: [PATCH] on clear, clear also fti cache

---
 plone/dexterity/schema.py | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/plone/dexterity/schema.py b/plone/dexterity/schema.py
index 7a0cfc0e..60edfa45 100644
--- a/plone/dexterity/schema.py
+++ b/plone/dexterity/schema.py
@@ -252,6 +252,10 @@ def schema_interfaces(self, fti):
     def clear(self):
         for fti in getAllUtilitiesRegisteredFor(IDexterityFTI):
             self.invalidate(fti)
+        request = getRequest()
+        fti_cache = getattr(request, FTI_CACHE_KEY, None)
+        if fti_cache is not None:
+            delattr(request, FTI_CACHE_KEY)
 
     @synchronized(lock)
     def invalidate(self, fti):