Merge branch 'master' of git://github.com/melinath/philo

[philo.git] / models / base.py

diff --git a/models/base.py b/models/base.py
index 2f5bf93..2a94daa 100644 (file)
--- a/models/base.py
+++ b/models/base.py
@@ -4,6 +4,7 @@ from django.contrib.contenttypes import generic
 from django.utils import simplejson as json
 from django.core.exceptions import ObjectDoesNotExist
 from philo.utils import ContentTypeRegistryLimiter
 from django.utils import simplejson as json
 from django.core.exceptions import ObjectDoesNotExist
 from philo.utils import ContentTypeRegistryLimiter

+from philo.signals import entity_class_prepared

 from UserDict import DictMixin
 
 
 from UserDict import DictMixin
 
 


@@ -52,6 +53,7 @@ class Attribute(models.Model):
        
        class Meta:
                app_label = 'philo'
        
        class Meta:
                app_label = 'philo'

+               unique_together = ('key', 'entity_content_type', 'entity_object_id')

 
 
 value_content_type_limiter = ContentTypeRegistryLimiter()
 
 
 value_content_type_limiter = ContentTypeRegistryLimiter()


@@ -71,8 +73,8 @@ class Relationship(models.Model):
        entity_object_id = models.PositiveIntegerField(verbose_name='Entity ID')
        entity = generic.GenericForeignKey('entity_content_type', 'entity_object_id')
        key = models.CharField(max_length=255)
        entity_object_id = models.PositiveIntegerField(verbose_name='Entity ID')
        entity = generic.GenericForeignKey('entity_content_type', 'entity_object_id')
        key = models.CharField(max_length=255)

-       value_content_type = models.ForeignKey(ContentType, related_name='relationship_value_set', limit_choices_to=value_content_type_limiter, verbose_name='Value type')
-       value_object_id = models.PositiveIntegerField(verbose_name='Value ID')
+       value_content_type = models.ForeignKey(ContentType, related_name='relationship_value_set', limit_choices_to=value_content_type_limiter, verbose_name='Value type', null=True, blank=True)
+       value_object_id = models.PositiveIntegerField(verbose_name='Value ID', null=True, blank=True)

        value = generic.GenericForeignKey('value_content_type', 'value_object_id')
        
        def __unicode__(self):
        value = generic.GenericForeignKey('value_content_type', 'value_object_id')
        
        def __unicode__(self):


@@ -80,6 +82,7 @@ class Relationship(models.Model):
        
        class Meta:
                app_label = 'philo'
        
        class Meta:
                app_label = 'philo'

+               unique_together = ('key', 'entity_content_type', 'entity_object_id')

 
 
 class QuerySetMapper(object, DictMixin):
 
 
 class QuerySetMapper(object, DictMixin):


@@ -102,7 +105,30 @@ class QuerySetMapper(object, DictMixin):
                return list(keys)
 
 
                return list(keys)
 
 

+class EntityOptions(object):
+       def __init__(self, options):
+               if options is not None:
+                       for key, value in options.__dict__.items():
+                               setattr(self, key, value)
+               if not hasattr(self, 'proxy_fields'):
+                       self.proxy_fields = []
+       
+       def add_proxy_field(self, proxy_field):
+               self.proxy_fields.append(proxy_field)
+
+
+class EntityBase(models.base.ModelBase):
+       def __new__(cls, name, bases, attrs):
+               new = super(EntityBase, cls).__new__(cls, name, bases, attrs)
+               entity_options = attrs.pop('EntityMeta', None)
+               setattr(new, '_entity_meta', EntityOptions(entity_options))
+               entity_class_prepared.send(sender=new)
+               return new
+
+

 class Entity(models.Model):
 class Entity(models.Model):

+       __metaclass__ = EntityBase
+       

        attribute_set = generic.GenericRelation(Attribute, content_type_field='entity_content_type', object_id_field='entity_object_id')
        relationship_set = generic.GenericRelation(Relationship, content_type_field='entity_content_type', object_id_field='entity_object_id')
        
        attribute_set = generic.GenericRelation(Attribute, content_type_field='entity_content_type', object_id_field='entity_object_id')
        relationship_set = generic.GenericRelation(Relationship, content_type_field='entity_content_type', object_id_field='entity_object_id')
        


@@ -114,6 +140,63 @@ class Entity(models.Model):
        def relationships(self):
                return QuerySetMapper(self.relationship_set)
        
        def relationships(self):
                return QuerySetMapper(self.relationship_set)
        

+       @property
+       def _added_attribute_registry(self):
+               if not hasattr(self, '_real_added_attribute_registry'):
+                       self._real_added_attribute_registry = {}
+               return self._real_added_attribute_registry
+       
+       @property
+       def _removed_attribute_registry(self):
+               if not hasattr(self, '_real_removed_attribute_registry'):
+                       self._real_removed_attribute_registry = []
+               return self._real_removed_attribute_registry
+       
+       @property
+       def _added_relationship_registry(self):
+               if not hasattr(self, '_real_added_relationship_registry'):
+                       self._real_added_relationship_registry = {}
+               return self._real_added_relationship_registry
+       
+       @property
+       def _removed_relationship_registry(self):
+               if not hasattr(self, '_real_removed_relationship_registry'):
+                       self._real_removed_relationship_registry = []
+               return self._real_removed_relationship_registry
+       
+       def save(self, *args, **kwargs):
+               super(Entity, self).save(*args, **kwargs)
+               
+               for key in self._removed_attribute_registry:
+                       self.attribute_set.filter(key__exact=key).delete()
+               del self._removed_attribute_registry[:]
+               
+               for key, value in self._added_attribute_registry.items():
+                       try:
+                               attribute = self.attribute_set.get(key__exact=key)
+                       except Attribute.DoesNotExist:
+                               attribute = Attribute()
+                               attribute.entity = self
+                               attribute.key = key
+                       attribute.value = value
+                       attribute.save()
+               self._added_attribute_registry.clear()
+               
+               for key in self._removed_relationship_registry:
+                       self.relationship_set.filter(key__exact=key).delete()
+               del self._removed_relationship_registry[:]
+               
+               for key, value in self._added_relationship_registry.items():
+                       try:
+                               relationship = self.relationship_set.get(key__exact=key)
+                       except Relationship.DoesNotExist:
+                               relationship = Relationship()
+                               relationship.entity = self
+                               relationship.key = key
+                       relationship.value = value
+                       relationship.save()
+               self._added_relationship_registry.clear()
+       

        class Meta:
                abstract = True
 
        class Meta:
                abstract = True
 


@@ -159,13 +242,29 @@ class TreeModel(models.Model):
        parent = models.ForeignKey('self', related_name='children', null=True, blank=True)
        slug = models.SlugField()
        
        parent = models.ForeignKey('self', related_name='children', null=True, blank=True)
        slug = models.SlugField()
        

-       def get_path(self, pathsep='/', field='slug'):
-               path = getattr(self, field, '?')
-               parent = self.parent
+       def has_ancestor(self, ancestor):
+               parent = self

                while parent:
                while parent:

-                       path = getattr(parent, field, '?') + pathsep + path
+                       if parent == ancestor:
+                               return True

                        parent = parent.parent
                        parent = parent.parent

-               return path
+               return False
+       
+       def get_path(self, root=None, pathsep='/', field='slug'):
+               if root is not None and self.has_ancestor(root):
+                       path = ''
+                       parent = self
+                       while parent and parent != root:
+                               path = getattr(parent, field, '?') + pathsep + path
+                               parent = parent.parent
+                       return path
+               else:
+                       path = getattr(self, field, '?')
+                       parent = self.parent
+                       while parent and parent != root:
+                               path = getattr(parent, field, '?') + pathsep + path
+                               parent = parent.parent
+                       return path

        path = property(get_path)
        
        def __unicode__(self):
        path = property(get_path)
        
        def __unicode__(self):