--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/cm/denorm_engine.py	Mon Nov 23 15:14:29 2009 +0100
@@ -0,0 +1,30 @@
+# This is the denormalisation engine
+# his goal is to leverage on django's signal to update
+# denormalized fields
+# this should be used with beanstalk or starling
+# python client (there is 2) http://github.com/earl/beanstalkc/tree/master
+
+import logging
+from django.db.models import signals
+from cm.models import TextVersion, Text
+
+# Text denormalisation
+def update_text_from_last_version(sender, **kwargs):
+    """
+    Update text's last version
+    """
+    text_version = kwargs['instance']
+    try:
+        text = text_version.text
+        text.update_denorm_fields()
+    except Text.DoesNotExist:
+        logging.warning('No text found for text_version: %i' %text_version.id)
+        
+        
+def connect_all():
+    # text updated by text_version
+    signals.post_save.connect(update_text_from_last_version, sender=TextVersion)
+    signals.post_delete.connect(update_text_from_last_version, sender=TextVersion)
+
+
+connect_all()
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