Fixed #3753 -- Allow optional display of invalid variable name in

TEMPLATE_STRING_IF_INVALID. Thanks, Matt McClanahan.


git-svn-id: http://code.djangoproject.com/svn/django/trunk@5167 bcc190cf-cafb-0310-a4f2-bffc1f526a37

1 files changed, 9 insertions, 0 deletions

diff --git a/django/template/__init__.py b/django/template/__init__.py
index 4cb4f21156..9811a5649d 100644
--- a/django/template/__init__.py
+++ b/django/template/__init__.py
@@ -99,6 +99,10 @@ libraries = {}
 # global list of libraries to load by default for a new parser
 builtins = []
 
+# True if TEMPLATE_STRING_IF_INVALID contains a format string (%s). None means
+# uninitialised.
+invalid_var_format_string = None
+
 class TemplateSyntaxError(Exception):
     def __str__(self):
         try:
@@ -575,6 +579,11 @@ class FilterExpression(object):
                 obj = None
             else:
                 if settings.TEMPLATE_STRING_IF_INVALID:
+                    global invalid_var_format_string
+                    if invalid_var_format_string is None:
+                        invalid_var_format_string = '%s' in settings.TEMPLATE_STRING_IF_INVALID
+                    if invalid_var_format_string:
+                        return settings.TEMPLATE_STRING_IF_INVALID % self.var
                     return settings.TEMPLATE_STRING_IF_INVALID
                 else:
                     obj = settings.TEMPLATE_STRING_IF_INVALID