Fixed index spec inheritance (MongoEngine/mongoengine#111)

docs/changelog.rst

@@ -2,6 +2,10 @@
 Changelog
 =========
 
+Changes in 0.7.1
+=================
+- Fixed index spec inheritance (MongoEngine/mongoengine#111)
+
 Changes in 0.7.0
 =================
 - Updated queryset.delete so you can use with skip / limit (MongoEngine/mongoengine#107)

mongoengine/queryset.py

@@ -510,6 +510,10 @@ class QuerySet(object):
         use_types = allow_inheritance and not spec.get('sparse', False)
 
         for key in spec['fields']:
+            # If inherited spec continue
+            if isinstance(key, (list, tuple)):
+                continue
+
             # Get ASCENDING direction from +, DESCENDING from -, and GEO2D from *
             direction = pymongo.ASCENDING
             if key.startswith("-"):

tests/test_document.py

@@ -669,6 +669,25 @@ class DocumentTest(unittest.TestCase):
 
         BlogPost.drop_collection()
 
+    def test_inherited_index(self):
+        """Ensure index specs are inhertited correctly"""
+
+        class A(Document):
+            title = StringField()
+            meta = {
+                'indexes': [
+                        {
+                        'fields': ('title',),
+                        },
+                ],
+                'allow_inheritance': True,
+                }
+
+        class B(A):
+            description = StringField()
+
+        self.assertEqual(A._meta['index_specs'], B._meta['index_specs'])
+
     def test_db_field_load(self):
         """Ensure we load data correctly
         """