Added a local cache to NavigationMapper - avoids some unpickling costs.

diff --git a/philo/contrib/shipherd/models.py b/philo/contrib/shipherd/models.py
index c299a14..3655e51 100644 (file)
--- a/philo/contrib/shipherd/models.py
+++ b/philo/contrib/shipherd/models.py
@@ -27,13 +27,12 @@ class NavigationMapper(object, DictMixin):
                self._cache = {}
        
        def __getitem__(self, key):
-               return Navigation.objects.get_for_node(self.node, key)
-               #if key not in self._cache:
-               #       try:
-               #               self._cache[key] = Navigation.objects.get_for_node(self.node, key)
-               #       except Navigation.DoesNotExist:
-               #               self._cache[key] = None
-               #return self._cache[key]
+               if key not in self._cache:
+                       try:
+                               self._cache[key] = Navigation.objects.get_for_node(self.node, key)
+                       except Navigation.DoesNotExist:
+                               self._cache[key] = None
+               return self._cache[key]
 
 
 def navigation(self):
@@ -62,7 +61,7 @@ class NavigationManager(models.Manager):
                                "node__%s__gte" % opts.right_attr: right,
                                "node__%s" % opts.tree_id_attr: tree_id
                        }
-                       navs = self.filter(key=key, **kwargs).order_by('-node__%s' % opts.level_attr)
+                       navs = self.filter(key=key, **kwargs).select_related('node').order_by('-node__%s' % opts.level_attr)
                        nav = navs[0]
                        roots = nav.roots.all().select_related('target_node').order_by('order')
                        item_opts = NavigationItem._mptt_meta