From e7e875bb7b32497c61cebc5024770bc1b9d7c13d Mon Sep 17 00:00:00 2001
From: mdipierro <massimo.dipierro@gmail.com>
Date: Mon, 24 Sep 2012 18:06:07 -0500
Subject: [PATCH] db().select(...query.case('true','false))

---
 VERSION      |  2 +-
 gluon/dal.py | 12 ++++++++++++
 2 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/VERSION b/VERSION
index feadba47..c5823366 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-Version 2.0.9 (2012-09-24 16:21:05) stable
+Version 2.0.9 (2012-09-24 18:05:59) stable
diff --git a/gluon/dal.py b/gluon/dal.py
index b047f6b3..db50179c 100644
--- a/gluon/dal.py
+++ b/gluon/dal.py
@@ -2009,6 +2009,16 @@ class BaseAdapter(ConnectionPool):
                         query = query & newquery
         return query
 
+    def CASE(self,query,t,f):
+        def represent(x):
+            if x is None: return 'NULL'
+            elif isinstance(x,Expression): return str(x)
+            types = {type(True): 'boolean',
+                     type(0): 'integer',
+                     type(1.0): 'double'}
+            return self.represent(x,types.get(type(x),'string'))
+        return Expression(self.db,'CASE WHEN %s THEN %s ELSE %s END' % \
+                              (self.expand(query),represent(t),represent(f)))
 
 ###################################################################################
 # List of all the available adapters; they all extend BaseAdapter.
@@ -8594,6 +8604,8 @@ class Query(object):
             return self.first
         return Query(self.db,self.db._adapter.NOT,self)
 
+    def case(self,t=1,f=0):
+        return self.db._adapter.CASE(self,t,f)