From c5da95bb008cf0e26f1106791550cb9c8b44695c Mon Sep 17 00:00:00 2001
From: Albert Cervera i Areny <albert@nan-tic.com>
Date: Wed, 15 Mar 2023 23:03:36 +0100
Subject: [PATCH] Do not check aggregates if field has no type.

---
 dashboard.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/dashboard.py b/dashboard.py
index 5596b80..984e022 100644
--- a/dashboard.py
+++ b/dashboard.py
@@ -922,7 +922,8 @@ class WidgetParameter(sequence_ordered(), ModelSQL, ModelView):
         if not self.aggregate or not self.field:
             return
         if self.aggregate in ('sum', 'avg'):
-            if self.field and self.field.type not in ('integer', 'float', 'numeric'):
+            if (self.field and self.field.type
+                    and self.field.type not in ('integer', 'float', 'numeric')):
                 raise UserError(gettext('babi.msg_invalid_aggregate',
                     parameter=self.rec_name, widget=self.widget.rec_name))