From 55e05840f022cf7e504060b8e2af6b876becc5ea Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?C=C3=A9dric=20Krier?= <ced@b2ck.com>
Date: Sat, 7 Sep 2019 23:45:08 +0200
Subject: [PATCH] Prevent assign unknown attributes on Model

by adding __slots__ on PoolMeta

issue8567
review254091002
---
 dunning.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/dunning.py b/dunning.py
index 5c842cfaf3..b1071af7bd 100644
--- a/dunning.py
+++ b/dunning.py
@@ -95,6 +95,8 @@ class Letter(CompanyReport, metaclass=PoolMeta):
     def get_party_letter():
 
         class PartyLetter(object, metaclass=PoolMeta):
+            __slots__ = ('dunnings', 'payments')
+
             def __init__(self, dunnings, payments):
                 self.dunnings = dunnings
                 self.payments = payments