Merge remote-tracking branch 'lapilofu/hotfix/manifest' into release

[philo.git] / philo / utils / entities.py

diff --git a/philo/utils/entities.py b/philo/utils/entities.py
index 754a5dc..830276e 100644 (file)
--- a/philo/utils/entities.py
+++ b/philo/utils/entities.py
@@ -1,8 +1,11 @@
+from functools import partial
 from UserDict import DictMixin
 
 from django.db import models
 from django.contrib.contenttypes.models import ContentType
 
+from philo.utils.lazycompat import SimpleLazyObject
+
 
 ### AttributeMappers
 
@@ -86,14 +89,21 @@ class AttributeMapper(object, DictMixin):
                        value_lookups.setdefault(a.value_content_type_id, []).append(a.value_object_id)
                        self._attributes_cache[a.key] = a
                
-               values_bulk = {}
+               values_bulk = dict(((ct_pk, SimpleLazyObject(partial(ContentType.objects.get_for_id(ct_pk).model_class().objects.in_bulk, pks))) for ct_pk, pks in value_lookups.items()))
+               
+               cache = {}
                
-               for ct_pk, pks in value_lookups.items():
-                       values_bulk[ct_pk] = ContentType.objects.get_for_id(ct_pk).model_class().objects.in_bulk(pks)
+               for a in attributes:
+                       cache[a.key] = SimpleLazyObject(partial(self._lazy_value_from_bulk, values_bulk, a))
+                       a._value_cache = cache[a.key]
                
-               self._cache.update(dict([(a.key, getattr(values_bulk[a.value_content_type_id].get(a.value_object_id), 'value', None)) for a in attributes]))
+               self._cache.update(cache)
                self._cache_filled = True
        
+       def _lazy_value_from_bulk(self, bulk, attribute):
+               v = bulk[attribute.value_content_type_id].get(attribute.value_object_id)
+               return getattr(v, 'value', None)
+       
        def clear_cache(self):
                """Clears the cache."""
                self._cache = {}