From 4bc9d0b15996a1d54fd4ba80c46fcd848cdb5b2d Mon Sep 17 00:00:00 2001
From: Maxime Chambreuil <mchambreuil@opensourceintegrators.com>
Date: Wed, 27 Mar 2019 12:53:30 -0600
Subject: [PATCH] [FIX] agreement: Issue #290

---
 agreement/models/agreement.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/agreement/models/agreement.py b/agreement/models/agreement.py
index c2ce8bb2..58a930dd 100644
--- a/agreement/models/agreement.py
+++ b/agreement/models/agreement.py
@@ -336,7 +336,7 @@ class Agreement(models.Model):
 
     @api.onchange('field_id')
     def onchange_sub_object_id(self):
-        if self.field_id:
+        if self.field_id and self.field_id.relation:
             self.sub_object_id = self.env['ir.model'].search(
                 [('model', '=', self.field_id.relation)])[0]