Changed behavior of the "ttl" argument of the withTransaction function.

diff --git a/rsbac/transaction.py b/rsbac/transaction.py
index 769ad36..9cf8e33 100644 (file)
--- a/rsbac/transaction.py
+++ b/rsbac/transaction.py
@@ -70,7 +70,11 @@ def _with( o , fun , args = () ) :
 def withCurrentTransaction( n , fun ) :
     return _with( CurrentTransaction( n ) , fun )
 
-def withTransaction( fun , uid = g_ALL_USERS , password = None , ttl = 0 ) :
+def withTransaction( fun , uid = g_ALL_USERS , password = None , ttl = None ) :
+    if ttl is None :
+        ttl = 0
+    else :
+        ttl = max( ttl , 1 )
     n = begin( uid , password , ttl )
     try :
         _with( CurrentTransaction( n ) , fun , ( Transaction( n ) , ) )