newforms-admin: Merged to [4431]

git-svn-id: http://code.djangoproject.com/svn/django/branches/newforms-admin@4432 bcc190cf-cafb-0310-a4f2-bffc1f526a37

2 files changed, 23 insertions, 10 deletions

diff --git a/django/db/models/fields/related.py b/django/db/models/fields/related.py
index ddb99c90a4..28491491ff 100644
--- a/django/db/models/fields/related.py
+++ b/django/db/models/fields/related.py
@@ -615,6 +615,7 @@ class ManyToManyField(RelatedField, Field):
             filter_interface=kwargs.pop('filter_interface', None),
             limit_choices_to=kwargs.pop('limit_choices_to', None),
             symmetrical=kwargs.pop('symmetrical', True))
+        self.db_table = kwargs.pop('db_table', None)
         Field.__init__(self, **kwargs)
 
         msg = gettext_lazy('Hold down "Control", or "Command" on a Mac, to select more than one.')
@@ -629,7 +630,10 @@ class ManyToManyField(RelatedField, Field):
 
     def _get_m2m_db_table(self, opts):
         "Function that can be curried to provide the m2m table name for this relation"
-        return '%s_%s' % (opts.db_table, self.name)
+        if self.db_table:
+            return self.db_table
+        else:
+            return '%s_%s' % (opts.db_table, self.name)
 
     def _get_m2m_column_name(self, related):
         "Function that can be curried to provide the source column name for the m2m table"
diff --git a/django/db/models/query.py b/django/db/models/query.py
index cbfd09e8d7..51fa334e63 100644
--- a/django/db/models/query.py
+++ b/django/db/models/query.py
@@ -1,5 +1,6 @@
 from django.db import backend, connection, transaction
 from django.db.models.fields import DateField, FieldDoesNotExist
+from django.db.models.fields.generic import GenericRelation
 from django.db.models import signals
 from django.dispatch import dispatcher
 from django.utils.datastructures import SortedDict
@@ -979,18 +980,26 @@ def delete_objects(seen_objs):
 
         pk_list = [pk for pk,instance in seen_objs[cls]]
         for related in cls._meta.get_all_related_many_to_many_objects():
-            for offset in range(0, len(pk_list), GET_ITERATOR_CHUNK_SIZE):
-                cursor.execute("DELETE FROM %s WHERE %s IN (%s)" % \
-                    (qn(related.field.m2m_db_table()),
-                        qn(related.field.m2m_reverse_name()),
-                        ','.join(['%s' for pk in pk_list[offset:offset+GET_ITERATOR_CHUNK_SIZE]])),
-                    pk_list[offset:offset+GET_ITERATOR_CHUNK_SIZE])
+            if not isinstance(related.field, GenericRelation):
+                for offset in range(0, len(pk_list), GET_ITERATOR_CHUNK_SIZE):
+                    cursor.execute("DELETE FROM %s WHERE %s IN (%s)" % \
+                        (qn(related.field.m2m_db_table()),
+                            qn(related.field.m2m_reverse_name()),
+                            ','.join(['%s' for pk in pk_list[offset:offset+GET_ITERATOR_CHUNK_SIZE]])),
+                        pk_list[offset:offset+GET_ITERATOR_CHUNK_SIZE])
         for f in cls._meta.many_to_many:
+            if isinstance(f, GenericRelation):
+                from django.contrib.contenttypes.models import ContentType 
+                query_extra = 'AND %s=%%s' % f.rel.to._meta.get_field(f.content_type_field_name).column
+                args_extra = [ContentType.objects.get_for_model(cls).id]
+            else:
+                query_extra = ''
+                args_extra = []
             for offset in range(0, len(pk_list), GET_ITERATOR_CHUNK_SIZE):
-                cursor.execute("DELETE FROM %s WHERE %s IN (%s)" % \
+                cursor.execute(("DELETE FROM %s WHERE %s IN (%s)" % \
                     (qn(f.m2m_db_table()), qn(f.m2m_column_name()),
-                    ','.join(['%s' for pk in pk_list[offset:offset+GET_ITERATOR_CHUNK_SIZE]])),
-                    pk_list[offset:offset+GET_ITERATOR_CHUNK_SIZE])
+                    ','.join(['%s' for pk in pk_list[offset:offset+GET_ITERATOR_CHUNK_SIZE]]))) + query_extra,
+                    pk_list[offset:offset+GET_ITERATOR_CHUNK_SIZE] + args_extra)
         for field in cls._meta.fields:
             if field.rel and field.null and field.rel.to in seen_objs:
                 for offset in range(0, len(pk_list), GET_ITERATOR_CHUNK_SIZE):