[1.6.x] Fixed #21566 -- Fixed AttributeError when using bulk_create with ForeignObject.

Backport of bbc73e6a12 from master.

django/db/models/query.py

@@ -342,7 +342,7 @@ class QuerySet(object):
             return objs
         self._for_write = True
         connection = connections[self.db]
-        fields = self.model._meta.local_fields
+        fields = self.model._meta.local_concrete_fields
         with transaction.commit_on_success_unless_managed(using=self.db):
             if (connection.features.can_combine_inserts_with_and_without_auto_increment_pk
                 and self.model._meta.has_auto_field):

tests/foreign_object/tests.py

@@ -4,7 +4,7 @@ from operator import attrgetter
 from .models import (
     Country, Person, Group, Membership, Friendship, Article,
     ArticleTranslation, ArticleTag, ArticleIdea, NewsArticle)
-from django.test import TestCase
+from django.test import TestCase, skipUnlessDBFeature
 from django.utils.translation import activate
 from django.core.exceptions import FieldError
 from django import forms
@@ -362,6 +362,13 @@ class MultiColumnFKTests(TestCase):
                     'active_translation')[0].active_translation.title,
                 "foo")
 
+    @skipUnlessDBFeature('has_bulk_insert')
+    def test_batch_create_foreign_object(self):
+        """ See: https://code.djangoproject.com/ticket/21566 """
+        objs = [Person(name="abcd_%s" % i, person_country=self.usa) for i in range(0, 5)]
+        Person.objects.bulk_create(objs, 10)
+
+
 class FormsTests(TestCase):
     # ForeignObjects should not have any form fields, currently the user needs
     # to manually deal with the foreignobject relation.