Moved container forms and attribute forms into admin. Moved AttributeFields and Entit...

[philo.git] / models / base.py

diff --git a/models/base.py b/models/base.py
index 20693b7..3bcf394 100644 (file)
--- a/models/base.py
+++ b/models/base.py
@@ -140,41 +140,48 @@ class ManyToManyValue(AttributeValue):
        content_type = models.ForeignKey(ContentType, limit_choices_to=value_content_type_limiter, verbose_name='Value type', null=True, blank=True)
        values = models.ManyToManyField(ForeignKeyValue, blank=True, null=True)
        
-       def get_object_id_list(self):
-               if not self.values.count():
-                       return []
-               else:
-                       return self.values.values_list('object_id', flat=True)
-       
-       def get_value(self):
-               if self.content_type is None:
-                       return None
-               
-               return self.content_type.model_class()._default_manager.filter(id__in=self.get_object_id_list())
+       def get_object_ids(self):
+               return self.values.values_list('object_id', flat=True)
+       object_ids = property(get_object_ids)
        
        def set_value(self, value):
-               # Value is probably a queryset - but allow any iterable.
+               # Value must be a queryset. Watch out for ModelMultipleChoiceField;
+               # it returns its value as a list if empty.
                
-               # These lines shouldn't be necessary; however, if value is an EmptyQuerySet,
-               # the code (specifically the object_id__in query) won't work without them. Unclear why...
-               if not value:
-                       value = []
+               self.content_type = ContentType.objects.get_for_model(value.model)
                
                # Before we can fiddle with the many-to-many to foreignkeyvalues, we need
                # a pk.
                if self.pk is None:
                        self.save()
                
-               if isinstance(value, models.query.QuerySet):
-                       value = value.values_list('id', flat=True)
+               object_ids = value.values_list('id', flat=True)
                
-               self.values.filter(~models.Q(object_id__in=value)).delete()
-               current = self.get_object_id_list()
+               # These lines shouldn't be necessary; however, if object_ids is an EmptyQuerySet,
+               # the code (specifically the object_id__in query) won't work without them. Unclear why...
+               # TODO: is this still the case?
+               if not object_ids:
+                       self.values.all().delete()
+               else:
+                       self.values.exclude(object_id__in=object_ids, content_type=self.content_type).delete()
+                       
+                       current_ids = self.object_ids
+                       
+                       for object_id in object_ids:
+                               if object_id in current_ids:
+                                       continue
+                               self.values.create(content_type=self.content_type, object_id=object_id)
+       
+       def get_value(self):
+               if self.content_type is None:
+                       return None
                
-               for v in value:
-                       if v in current:
-                               continue
-                       self.values.create(content_type=self.content_type, object_id=v)
+               # HACK to be safely explicit until http://code.djangoproject.com/ticket/15145 is resolved
+               object_ids = self.object_ids
+               manager = self.content_type.model_class()._default_manager
+               if not object_ids:
+                       return manager.none()
+               return manager.filter(id__in=self.object_ids)
        
        value = property(get_value, set_value)
        
@@ -184,7 +191,7 @@ class ManyToManyValue(AttributeValue):
                
                if self.content_type:
                        kwargs = {
-                               'initial': self.get_object_id_list(),
+                               'initial': self.object_ids,
                                'required': False,
                                'queryset': self.content_type.model_class()._default_manager.all()
                        }
@@ -198,7 +205,9 @@ class ManyToManyValue(AttributeValue):
                        self.values.clear()
                        self.content_type = ct
                else:
-                       value = kwargs.get('value', self.content_type.model_class()._default_manager.none())
+                       value = kwargs.get('value', None)
+                       if not value:
+                               value = self.content_type.model_class()._default_manager.none()
                        self.set_value(value)
        construct_instance.alters_data = True