Eliminated (Generic)ForeignKey evaluations in shipherd's NavigationManager.update_cac...

[philo.git] / philo / contrib / shipherd / models.py

diff --git a/philo/contrib/shipherd/models.py b/philo/contrib/shipherd/models.py
index f35be3c..de9a869 100644 (file)
--- a/philo/contrib/shipherd/models.py
+++ b/philo/contrib/shipherd/models.py
@@ -7,7 +7,7 @@ from django.core.validators import RegexValidator, MinValueValidator
 from django.db import models
 from django.forms.models import model_to_dict
 
-from philo.models.base import TreeEntity, TreeManager, Entity
+from philo.models.base import TreeEntity, TreeEntityManager, Entity
 from philo.models.nodes import Node, TargetURLModel
 
 
@@ -163,12 +163,12 @@ class NavigationManager(models.Manager):
                
                # A distinct query is not strictly necessary. TODO: benchmark the efficiency
                # with/without distinct.
-               targets = list(Node.objects.filter(pk__in=target_pks).distinct())
+               targets = dict([(n.pk, n) for n in Node.objects.filter(pk__in=target_pks).distinct()])
                
                for cache in caches:
                        for item in cache['items']:
                                if item.target_node_id:
-                                       item.target_node = targets[targets.index(item.target_node)]
+                                       item.target_node = targets[item.target_node_id]
        
        def clear_cache(self):
                """Clears the manager's entire navigation cache."""
@@ -179,6 +179,15 @@ class Navigation(Entity):
        """
        :class:`Navigation` represents a group of :class:`NavigationItem`\ s that have an intrinsic relationship in terms of navigating a website. For example, a ``main`` navigation versus a ``side`` navigation, or a ``authenticated`` navigation versus an ``anonymous`` navigation.
        
+       A :class:`Navigation`'s :class:`NavigationItem`\ s will be accessible from its related :class:`.Node` and that :class:`.Node`'s descendants through a :class:`NavigationMapper` instance at :attr:`Node.navigation`. Example::
+       
+               >>> node.navigation_set.all()
+               []
+               >>> parent = node.parent
+               >>> items = parent.navigation_set.get(key='main').roots.all()
+               >>> parent.navigation["main"] == node.navigation["main"] == list(items)
+               True
+       
        """
        #: A :class:`NavigationManager` instance.
        objects = NavigationManager()
@@ -215,7 +224,7 @@ class Navigation(Entity):
                unique_together = ('node', 'key')
 
 
-class NavigationItemManager(TreeManager):
+class NavigationItemManager(TreeEntityManager):
        use_for_related = True
        
        def get_query_set(self):
@@ -240,8 +249,9 @@ class NavigationItem(TreeEntity, TargetURLModel):
                self._initial_data = model_to_dict(self)
                self._is_cached = False
        
-       def __unicode__(self):
-               return self.get_path(field='text', pathsep=u' › ')
+       def get_path(self, root=None, pathsep=u' › ', field='text'):
+               return super(NavigationItem, self).get_path(root, pathsep, field)
+       path = property(get_path)
        
        def clean(self):
                super(NavigationItem, self).clean()