Ticket #622: isnull.diff

defaultfilters.py

@@ -330 +330 @@
 ###################
 
 def default(value, arg):
-    "If value is unavailable, use given default"
+    "If value is false, use given default"
     return value or arg
 
+def isnull(value, arg):
+    "If value is unavailable, use given default"
+    if value == None:
+        return arg
+    return value
+
+
 def divisibleby(value, arg):
     "Returns true if the value is devisible by the argument"
     return int(value) % int(arg) == 0