Making sure list value PBs all have same indexed value.

Also throwing exception explaining why this must be true.

gcloud/datastore/helpers.py

@@ -52,8 +52,21 @@ def entity_from_protobuf(pb):
     for property_pb in pb.property:
         value = _get_value_from_property_pb(property_pb)
         entity_props[property_pb.name] = value
-        if not property_pb.value.indexed:
-            exclude_from_indexes.append(property_pb.name)
+
+        # Check if property_pb.value was indexed. Lists need to be
+        # special-cased and we require all `indexed` values in a list agree.
+        if isinstance(value, list):
+            indexed_values = set(value_pb.indexed
+                                 for value_pb in property_pb.value.list_value)
+            if len(indexed_values) != 1:
+                raise ValueError('For a list_value, subvalues must either all '
+                                 'be indexed or all excluded from indexes.')
+
+            if not indexed_values.pop():
+                exclude_from_indexes.append(property_pb.name)
+        else:
+            if not property_pb.value.indexed:
+                exclude_from_indexes.append(property_pb.name)
 
     entity = Entity(key=key, exclude_from_indexes=exclude_from_indexes)
     entity.update(entity_props)

gcloud/datastore/test_helpers.py

@@ -48,11 +48,29 @@ def test_it(self):
         unindexed_prop_pb.value.integer_value = 10
         unindexed_prop_pb.value.indexed = False
 
+        list_prop_pb1 = entity_pb.property.add()
+        list_prop_pb1.name = 'baz'
+        list_pb1 = list_prop_pb1.value.list_value
+
+        unindexed_value_pb = list_pb1.add()
+        unindexed_value_pb.integer_value = 11
+        unindexed_value_pb.indexed = False
+
+        list_prop_pb2 = entity_pb.property.add()
+        list_prop_pb2.name = 'qux'
+        list_pb2 = list_prop_pb2.value.list_value
+
+        indexed_value_pb = list_pb2.add()
+        indexed_value_pb.integer_value = 12
+        indexed_value_pb.indexed = True
+
         entity = self._callFUT(entity_pb)
         self.assertEqual(entity.kind, _KIND)
-        self.assertEqual(entity.exclude_from_indexes, frozenset(['bar']))
+        self.assertEqual(entity.exclude_from_indexes,
+                         frozenset(['bar', 'baz']))
         entity_props = dict(entity)
-        self.assertEqual(entity_props, {'foo': 'Foo', 'bar': 10})
+        self.assertEqual(entity_props,
+                         {'foo': 'Foo', 'bar': 10, 'baz': [11], 'qux': [12]})
 
         # Also check the key.
         key = entity.key
@@ -61,6 +79,31 @@ def test_it(self):
         self.assertEqual(key.kind, _KIND)
         self.assertEqual(key.id, _ID)
 
+    def test_mismatched_value_indexed(self):
+        from gcloud.datastore import _datastore_v1_pb2 as datastore_pb
+
+        _DATASET_ID = 'DATASET'
+        _KIND = 'KIND'
+        _ID = 1234
+        entity_pb = datastore_pb.Entity()
+        entity_pb.key.partition_id.dataset_id = _DATASET_ID
+        entity_pb.key.path_element.add(kind=_KIND, id=_ID)
+
+        list_prop_pb = entity_pb.property.add()
+        list_prop_pb.name = 'baz'
+        list_pb = list_prop_pb.value.list_value
+
+        unindexed_value_pb1 = list_pb.add()
+        unindexed_value_pb1.integer_value = 10
+        unindexed_value_pb1.indexed = False
+
+        unindexed_value_pb2 = list_pb.add()
+        unindexed_value_pb2.integer_value = 11
+        unindexed_value_pb2.indexed = True
+
+        with self.assertRaises(ValueError):
+            self._callFUT(entity_pb)
+
 
 class Test_key_from_protobuf(unittest2.TestCase):