X-Git-Url: http://git.ithinksw.org/philo.git/blobdiff_plain/82e22de23b182353e35aa4e2fde0c08f4df5653f..9b40768160da75802636fc2b45c1f68bd36fd7bd:/models/base.py

diff --git a/models/base.py b/models/base.py
index 81e557f..9da9230 100644
--- a/models/base.py
+++ b/models/base.py
@@ -3,6 +3,7 @@ from django.contrib.contenttypes.models import ContentType
 from django.contrib.contenttypes import generic
 from django.utils import simplejson as json
 from django.core.exceptions import ObjectDoesNotExist
+from philo.exceptions import AncestorDoesNotExist
 from philo.utils import ContentTypeRegistryLimiter
 from philo.signals import entity_class_prepared
 from UserDict import DictMixin
@@ -53,6 +54,7 @@ class Attribute(models.Model):
 	
 	class Meta:
 		app_label = 'philo'
+		unique_together = ('key', 'entity_content_type', 'entity_object_id')
 
 
 value_content_type_limiter = ContentTypeRegistryLimiter()
@@ -81,6 +83,7 @@ class Relationship(models.Model):
 	
 	class Meta:
 		app_label = 'philo'
+		unique_together = ('key', 'entity_content_type', 'entity_object_id')
 
 
 class QuerySetMapper(object, DictMixin):
@@ -249,7 +252,9 @@ class TreeModel(models.Model):
 		return False
 	
 	def get_path(self, root=None, pathsep='/', field='slug'):
-		if root is not None and self.has_ancestor(root):
+		if root is not None:
+			if not self.has_ancestor(root):
+				raise AncestorDoesNotExist(root)
 			path = ''
 			parent = self
 			while parent and parent != root:
@@ -273,7 +278,7 @@ class TreeModel(models.Model):
 		abstract = True
 
 
-class TreeEntity(TreeModel, Entity):
+class TreeEntity(Entity, TreeModel):
 	@property
 	def attributes(self):
 		if self.parent: