Fixed reverse URL lookup using functions when the original URL pattern was a

string. This is now just as fragile as it was prior to [5609], but works in a
few cases that people were relying on, apparently.


git-svn-id: http://code.djangoproject.com/svn/django/trunk@5632 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/utils/functional.py

@@ -3,18 +3,20 @@ def curry(_curried_func, *args, **kwargs):
         return _curried_func(*(args+moreargs), **dict(kwargs, **morekwargs))
     return _curried
 
-def memoize(func, cache):
+def memoize(func, cache, num_args):
     """
     Wrap a function so that results for any argument tuple are stored in
     'cache'. Note that the args to the function must be usable as dictionary
     keys.
+
+    Only the first num_args are considered when creating the key.
     """
     def wrapper(*args):
-        if args in cache:
-            return cache[args]
-
+        mem_args = args[:num_args]
+        if mem_args in cache:
+            return cache[mem_args]
         result = func(*args)
-        cache[args] = result
+        cache[mem_args] = result
         return result
     return wrapper