--- a/src/cm/converters/pandoc_converters.py	Tue Apr 20 11:37:33 2010 +0200
+++ b/src/cm/converters/pandoc_converters.py	Thu Apr 22 11:32:41 2010 +0200
@@ -1,6 +1,6 @@
 # python 2.5 compat
 from __future__ import with_statement
-from cm.utils.cache import memoize
+from cm.utils.cache import memoize, dj_memoize
 ######
 ## This module requires pandoc v > 1.0 (pandoc & markdown executables) 
 ######
@@ -37,7 +37,7 @@
 
 _PANDOC_ENCODING = 'utf8'
 
-@memoize
+@dj_memoize
 def pandoc_convert(content, from_format, to_format, full=False, raw=False):
     """
     Convert markdown content to pdf
@@ -72,7 +72,7 @@
 
     return content
 
-@memoize
+@dj_memoize
 def do_tidy(content=None, file_name=None):
     """
     Tidy (html) content
@@ -109,7 +109,7 @@
 if not os.path.isfile(LATEX_HEADER_PATH):
     raise Exception('LATEX_HEADER_PATH is not a file!')
 
-@memoize
+@dj_memoize
 def pandoc_markdown2pdf(content=None, file_name=None):
     """
     Convert markdown content to pdf
@@ -154,7 +154,7 @@
 # TODO: manage images in pandoc (?)
 # TODO: use tidy to cleanup html
 
-@memoize
+@dj_memoize
 def pandoc_pandoc(content, from_format, to_format, full=False, raw=False):
     """
     Convert content (should be unicode) from from_format to to_format

--- a/src/cm/utils/cache.py	Tue Apr 20 11:37:33 2010 +0200
+++ b/src/cm/utils/cache.py	Thu Apr 22 11:32:41 2010 +0200
@@ -1,9 +1,10 @@
 from django.core.cache import cache
+from hashlib import sha1
 
 # adapted [to django] from http://code.activestate.com/recipes/325205/
 def dj_memoize(f):
     def g(*args, **kwargs):
-        key = ( f.__name__, f, tuple(args), frozenset(kwargs.items()) )
+        key = sha1( str((f.__name__, f, tuple(args), frozenset(kwargs.items())) )).hexdigest()
         val = cache.get(key)
         if not val:
             val = f(*args, **kwargs)