add manage command to rebuild cache, only update cache after updating sort values

pandora/item/management/commands/rebuildcache.py

@@ -0,0 +1,29 @@
+# -*- coding: utf-8 -*-
+# vi:si:et:sw=4:sts=4:ts=4
+
+import os
+from os.path import join, dirname, basename, splitext, exists
+
+from django.core.management.base import BaseCommand, CommandError
+from django.conf import settings
+
+from ... import models
+
+
+class Command(BaseCommand):
+    """
+    rebuild sort/search cache for all items.
+    """
+    help = 'listen to rabbitmq and execute encoding tasks.'
+    args = ''
+
+    def handle(self, **options):
+        offset = 0
+        chunk = 100
+        pos = models.Item.objects.count()
+        while offset <= models.Item.objects.count():
+            for i in models.Item.objects.all().order_by('id')[offset:offset+chunk]:
+                print pos, i.itemId
+                i.save()
+                pos -= 1
+            offset += chunk