From 93be19674c4072725be9aa4eac890931c8b0e294 Mon Sep 17 00:00:00 2001
From: Petr Viktorin <encukou@gmail.com>
Date: Sun, 3 Apr 2011 19:42:46 +0300
Subject: [PATCH] Enable nullable MarkdownColumns

---
 pokedex/db/markdown.py | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/pokedex/db/markdown.py b/pokedex/db/markdown.py
index 616830a..257c8de 100644
--- a/pokedex/db/markdown.py
+++ b/pokedex/db/markdown.py
@@ -106,6 +106,9 @@ class MarkdownColumn(sqlalchemy.types.TypeDecorator):
     impl = sqlalchemy.types.Unicode
 
     def process_bind_param(self, value, dialect):
+        if value is None:
+            return None
+
         if not isinstance(value, basestring):
             # Can't assign, e.g., MarkdownString objects yet
             raise NotImplementedError
@@ -113,4 +116,7 @@ class MarkdownColumn(sqlalchemy.types.TypeDecorator):
         return unicode(value)
 
     def process_result_value(self, value, dialect):
+        if value is None:
+            return None
+
         return MarkdownString(value)
-- 
2.7.4