From b042c699dd74cafe9845cb157fa898c1b491d9d4 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Nicolas=20=C3=89vrard?= <nicoe@b2ck.com>
Date: Wed, 27 Oct 2021 17:01:59 +0200
Subject: [PATCH] Test GL context values against None instead of using their
 presence

issue10896
review385271002
(grafted from 1e8fd17cfc05205c24ec565f96b6fe14bf9bf39c)

--HG--
branch : 6.0
---
 account.py | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/account.py b/account.py
index a8e57abf54..dafada36cc 100644
--- a/account.py
+++ b/account.py
@@ -1724,10 +1724,10 @@ class _GeneralLedgerAccount(ActivePeriodMixin, ModelSQL, ModelView):
         Account = cls._get_account()
 
         period_ids, from_date, to_date = None, None, None
-        context_keys = Transaction().context.keys()
-        if context_keys & {'start_period', 'end_period'}:
+        context = Transaction().context
+        if context.get('start_period') or context.get('end_period'):
             period_ids = cls.get_period_ids(name)
-        elif context_keys & {'from_date', 'end_date'}:
+        elif context.get('from_date') or context.get('end_date'):
             from_date, to_date = cls.get_dates(name)
         else:
             if name.startswith('start_'):