Creating an abstract model named InheritableTreeEntity which Node now descends from.

[philo.git] / models.py

diff --git a/models.py b/models.py
index 41e9a15..cea36c2 100644 (file)
--- a/models.py
+++ b/models.py
@@ -163,10 +163,10 @@ class TreeModel(models.Model):
        slug = models.SlugField()
        
        def get_path(self, pathsep='/', field='slug'):
-               path = getattr(self, field)
+               path = getattr(self, field, '?')
                parent = self.parent
                while parent:
-                       path = getattr(parent, field) + pathsep + path
+                       path = getattr(parent, field, '?') + pathsep + path
                        parent = parent.parent
                return path
        path = property(get_path)
@@ -195,27 +195,44 @@ class TreeEntity(TreeModel, Entity):
                abstract = True
 
 
-class Node(TreeEntity):
+class InheritableTreeEntity(TreeEntity):
        instance_type = models.ForeignKey(ContentType, editable=False)
        
+       def save(self, force_insert=False, force_update=False):
+               if not hasattr(self, 'instance_type_ptr'):
+                       self.instance_type = ContentType.objects.get_for_model(self.__class__)
+               super(InheritableTreeEntity, self).save(force_insert, force_update)
+       
+       @property
+       def instance(self):
+               return self.instance_type.get_object_for_this_type(id=self.id)
+       
        def get_path(self, pathsep='/', field='slug'):
-               path = getattr(self.instance, field)
+               path = getattr(self.instance, field, '?')
                parent = self.parent
                while parent:
-                       path = getattr(parent.instance, field) + pathsep + path
+                       path = getattr(parent.instance, field, '?') + pathsep + path
                        parent = parent.parent
                return path
        path = property(get_path)
        
-       def save(self, force_insert=False, force_update=False):
-               if not hasattr(self, 'instance_type_ptr'):
-                       self.instance_type = ContentType.objects.get_for_model(self.__class__)
-               super(Node, self).save(force_insert, force_update)
-       
        @property
-       def instance(self):
-               return self.instance_type.get_object_for_this_type(id=self.id)
+       def attributes(self):
+               if self.parent:
+                       return QuerySetMapper(self.instance.attribute_set, passthrough=self.parent.instance.attributes)
+               return QuerySetMapper(self.instance.attribute_set)
+
+       @property
+       def relationships(self):
+               if self.parent:
+                       return QuerySetMapper(self.instance.relationship_set, passthrough=self.parent.instance.relationships)
+               return QuerySetMapper(self.instance.relationship_set)
        
+       class Meta:
+               abstract = True
+
+
+class Node(InheritableTreeEntity):
        accepts_subpath = False
        
        def render_to_response(self, request, path=None, subpath=None):