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Make queryset aggregates obey read_preference

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This commit is contained in:
Benoit Larroque 2017-06-27 00:43:41 +02:00
parent a8d6e59a7a
commit 0bc6507df3
2 changed files with 24 additions and 0 deletions
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4
mongoengine/queryset/base.py
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@ -1182,6 +1182,10 @@ class BaseQuerySet(object):
pipeline = initial_pipeline + list(pipeline) pipeline = initial_pipeline + list(pipeline)
if IS_PYMONGO_3 and self._read_preference is not None:
return self._collection.with_options(read_preference=self._read_preference) \
.aggregate(pipeline, cursor={}, **kwargs)
return self._collection.aggregate(pipeline, cursor={}, **kwargs) return self._collection.aggregate(pipeline, cursor={}, **kwargs)
# JS functionality # JS functionality

20
tests/queryset/queryset.py
View File

@ -4353,6 +4353,26 @@ class QuerySetTest(unittest.TestCase):
self.assertEqual(bars._cursor._Cursor__read_preference, self.assertEqual(bars._cursor._Cursor__read_preference,
ReadPreference.SECONDARY_PREFERRED) ReadPreference.SECONDARY_PREFERRED)
@needs_mongodb_v26
def test_read_preference_aggregation_framework(self):
class Bar(Document):
txt = StringField()
meta = {
'indexes': ['txt']
}
# Aggregates with read_preference
bars = Bar.objects \
.read_preference(ReadPreference.SECONDARY_PREFERRED) \
.aggregate()
if IS_PYMONGO_3:
self.assertEqual(bars._CommandCursor__collection.read_preference,
ReadPreference.SECONDARY_PREFERRED)
else:
self.assertNotEqual(bars._CommandCursor__collection.read_preference,
ReadPreference.SECONDARY_PREFERRED)
def test_json_simple(self): def test_json_simple(self):
class Embedded(EmbeddedDocument): class Embedded(EmbeddedDocument):