From 876508a2271188d595cb5d98ba7a71c99d075672 Mon Sep 17 00:00:00 2001
From: zvolsky <zvolsky@seznam.cz>
Date: Mon, 6 Jun 2016 12:43:11 +0200
Subject: [PATCH] grid: custom representation of None value, in view

---
 gluon/sqlhtml.py | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/gluon/sqlhtml.py b/gluon/sqlhtml.py
index 1020e07f..30ce280c 100644
--- a/gluon/sqlhtml.py
+++ b/gluon/sqlhtml.py
@@ -2318,6 +2318,10 @@ class SQLFORM(FORM):
         elif details and request.args(-3) == 'view':
             table = db[request.args[-2]]
             record = table(request.args[-1]) or redirect(referrer)
+            if represent_none is not None:
+                for field in record.iterkeys():
+                    if record[field] is None:
+                        record[field] = represent_none
             sqlformargs = dict(upload=upload, ignore_rw=ignore_rw,
                                formstyle=formstyle, readonly=True,
                                _class='web2py_form')