From 178b9f2bcbcfd92dcf6afee966a69ab2892a7b38 Mon Sep 17 00:00:00 2001
From: Lance Edgar <lance@edbob.org>
Date: Wed, 16 Aug 2017 18:32:17 -0500
Subject: [PATCH] Add `LocalDateTimeFieldRenderer` for formalchemy

---
 tailbone/forms/renderers/__init__.py |  4 ++--
 tailbone/forms/renderers/common.py   | 13 +++++++++++++
 2 files changed, 15 insertions(+), 2 deletions(-)

diff --git a/tailbone/forms/renderers/__init__.py b/tailbone/forms/renderers/__init__.py
index 4fbcc68d..b0f30233 100644
--- a/tailbone/forms/renderers/__init__.py
+++ b/tailbone/forms/renderers/__init__.py
@@ -1,4 +1,4 @@
-# -*- coding: utf-8 -*-
+# -*- coding: utf-8; -*-
 ################################################################################
 #
 #  Rattail -- Retail Software Framework
@@ -30,7 +30,7 @@ from .core import CustomFieldRenderer, DateFieldRenderer
 
 from .common import (StrippedTextFieldRenderer, CodeTextAreaFieldRenderer, AutocompleteFieldRenderer,
                      DecimalFieldRenderer, CurrencyFieldRenderer, QuantityFieldRenderer,
-                     DateTimeFieldRenderer, DateTimePrettyFieldRenderer, TimeFieldRenderer,
+                     DateTimeFieldRenderer, DateTimePrettyFieldRenderer, LocalDateTimeFieldRenderer, TimeFieldRenderer,
                      EmailFieldRenderer, EnumFieldRenderer, YesNoFieldRenderer)
 
 from .files import FileFieldRenderer
diff --git a/tailbone/forms/renderers/common.py b/tailbone/forms/renderers/common.py
index 6c42a4ab..e1468e08 100644
--- a/tailbone/forms/renderers/common.py
+++ b/tailbone/forms/renderers/common.py
@@ -156,6 +156,19 @@ class DateTimePrettyFieldRenderer(fa.DateTimeFieldRenderer):
         return pretty_datetime(self.request.rattail_config, value)
 
 
+class LocalDateTimeFieldRenderer(fa.DateTimeFieldRenderer):
+    """
+    This renderer assumes the datetime field value is "naive" in local time zone.
+    """
+
+    def render_readonly(self, **kwargs):
+        value = self.raw_value
+        if not value:
+            return ''
+        value = localtime(self.request.rattail_config, value)
+        return raw_datetime(self.request.rattail_config, value)
+
+
 class TimeFieldRenderer(fa.TimeFieldRenderer):
     """
     Custom renderer for time fields.  In edit mode, renders a simple text