From 89f68acc6a4e7620239fccf9870c738a3906c60e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Katja=20Su=CC=88ss?= <k.suess@rohberg.ch>
Date: Thu, 18 May 2023 16:58:47 +0200
Subject: [PATCH] Check for existing relations of same attributes

---
 src/plone/api/relation.py | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/src/plone/api/relation.py b/src/plone/api/relation.py
index fe1103fa..67ff0d7b 100644
--- a/src/plone/api/relation.py
+++ b/src/plone/api/relation.py
@@ -170,9 +170,8 @@ def create(source=None, target=None, relationship=None):
         "from_id": from_id,
         "to_id": to_id,
     }
-    has_relation = False
-    for rel in relation_catalog.findRelations(query):
-        has_relation = True
+    has_relation = False if (
+        len([el for el in relation_catalog.findRelations(query)]) == 0) else True
 
     if from_attribute == referencedRelationship:
         # Don't mess with linkintegrity-relations!