Fix groupby returns without results

Author: dirkkul

integration/test_collection_aggregate.py

@@ -99,6 +99,15 @@ def test_aggregation_groupby_with_limit(collection_factory: CollectionFactory) -
     assert res.groups[1].properties["text"].count == 1
 
 
+def test_aggregation_groupby_no_results(collection_factory: CollectionFactory) -> None:
+    collection = collection_factory(properties=[Property(name="text", data_type=DataType.TEXT)])
+    res = collection.aggregate.over_all(
+        return_metrics=[Metrics("text").text(count=True)],
+        group_by=GroupByAggregate(prop="text", limit=2),
+    )
+    assert len(res.groups) == 0
+
+
 @pytest.mark.parametrize(
     "filter_",
     [

weaviate/collections/aggregations/base_executor.py

@@ -92,17 +92,17 @@ def _to_aggregate_result(
             )
 
     def _to_result(
-        self, response: aggregate_pb2.AggregateReply
+        self, is_groupby: bool, response: aggregate_pb2.AggregateReply
     ) -> Union[AggregateReturn, AggregateGroupByReturn]:
-        if response.HasField("single_result"):
+        if not is_groupby:
             return AggregateReturn(
                 properties={
                     aggregation.property: self.__parse_property_grpc(aggregation)
                     for aggregation in response.single_result.aggregations.aggregations
                 },
                 total_count=response.single_result.objects_count,
             )
-        if response.HasField("grouped_results"):
+        if is_groupby:
             return AggregateGroupByReturn(
                 groups=[
                     AggregateGroup(
@@ -116,9 +116,6 @@ def _to_result(
                     for group in response.grouped_results.groups
                 ]
             )
-        else:
-            _Warnings.unknown_type_encountered(response.WhichOneof("result"))
-            return AggregateReturn(properties={}, total_count=None)
 
     def __parse_grouped_by_value(
         self, grouped_by: aggregate_pb2.AggregateReply.Group.GroupedBy

weaviate/collections/aggregations/hybrid/executor.py

@@ -13,6 +13,7 @@
 from weaviate.connect.v4 import ConnectionType
 from weaviate.exceptions import WeaviateUnsupportedFeatureError
 from weaviate.types import NUMBER
+from weaviate.proto.v1 import aggregate_pb2
 
 
 class _HybridExecutor(Generic[ConnectionType], _BaseExecutor[ConnectionType]):
@@ -161,8 +162,14 @@ def resp(res: dict) -> Union[AggregateReturn, AggregateGroupByReturn]:
                 limit=group_by.limit if group_by is not None else None,
                 objects_count=total_count,
             )
+
+            def respGrpc(
+                res: aggregate_pb2.AggregateReply,
+            ) -> Union[AggregateReturn, AggregateGroupByReturn]:
+                return self._to_result(group_by is not None, res)
+
             return executor.execute(
-                response_callback=self._to_result,
+                response_callback=respGrpc,
                 method=self._connection.grpc_aggregate,
                 request=request,
             )

weaviate/collections/aggregations/near_image/executor.py

@@ -13,6 +13,7 @@
 from weaviate.connect.v4 import ConnectionType
 from weaviate.types import BLOB_INPUT, NUMBER
 from weaviate.util import parse_blob
+from weaviate.proto.v1 import aggregate_pb2
 
 
 class _NearImageExecutor(Generic[ConnectionType], _BaseExecutor[ConnectionType]):
@@ -144,8 +145,14 @@ def resp(res: dict) -> Union[AggregateReturn, AggregateGroupByReturn]:
                 objects_count=total_count,
                 object_limit=object_limit,
             )
+
+            def respGrpc(
+                res: aggregate_pb2.AggregateReply,
+            ) -> Union[AggregateReturn, AggregateGroupByReturn]:
+                return self._to_result(group_by is not None, res)
+
             return executor.execute(
-                response_callback=self._to_result,
+                response_callback=respGrpc,
                 method=self._connection.grpc_aggregate,
                 request=request,
             )

weaviate/collections/aggregations/near_object/executor.py

@@ -12,6 +12,7 @@
 from weaviate.connect import executor
 from weaviate.connect.v4 import ConnectionType
 from weaviate.types import NUMBER, UUID
+from weaviate.proto.v1 import aggregate_pb2
 
 
 class _NearObjectExecutor(Generic[ConnectionType], _BaseExecutor[ConnectionType]):
@@ -142,8 +143,14 @@ def resp(res: dict) -> Union[AggregateReturn, AggregateGroupByReturn]:
                 objects_count=total_count,
                 object_limit=object_limit,
             )
+
+            def respGrpc(
+                res: aggregate_pb2.AggregateReply,
+            ) -> Union[AggregateReturn, AggregateGroupByReturn]:
+                return self._to_result(group_by is not None, res)
+
             return executor.execute(
-                response_callback=self._to_result,
+                response_callback=respGrpc,
                 method=self._connection.grpc_aggregate,
                 request=request,
             )

weaviate/collections/aggregations/near_text/executor.py

@@ -13,6 +13,7 @@
 from weaviate.connect import executor
 from weaviate.connect.v4 import ConnectionType
 from weaviate.types import NUMBER
+from weaviate.proto.v1 import aggregate_pb2
 
 
 class _NearTextExecutor(Generic[ConnectionType], _BaseExecutor[ConnectionType]):
@@ -162,8 +163,14 @@ def resp(res: dict) -> Union[AggregateReturn, AggregateGroupByReturn]:
                 objects_count=total_count,
                 object_limit=object_limit,
             )
+
+            def respGrpc(
+                res: aggregate_pb2.AggregateReply,
+            ) -> Union[AggregateReturn, AggregateGroupByReturn]:
+                return self._to_result(group_by is not None, res)
+
             return executor.execute(
-                response_callback=self._to_result,
+                response_callback=respGrpc,
                 method=self._connection.grpc_aggregate,
                 request=request,
             )

weaviate/collections/aggregations/near_vector/executor.py

@@ -17,6 +17,7 @@
 from weaviate.connect.v4 import ConnectionType
 from weaviate.exceptions import WeaviateInvalidInputError
 from weaviate.types import NUMBER
+from weaviate.proto.v1 import aggregate_pb2
 
 
 class _NearVectorExecutor(Generic[ConnectionType], _BaseExecutor[ConnectionType]):
@@ -163,8 +164,14 @@ def resp(res: dict) -> Union[AggregateReturn, AggregateGroupByReturn]:
                 objects_count=total_count,
                 object_limit=object_limit,
             )
+
+            def respGrpc(
+                res: aggregate_pb2.AggregateReply,
+            ) -> Union[AggregateReturn, AggregateGroupByReturn]:
+                return self._to_result(group_by is not None, res)
+
             return executor.execute(
-                response_callback=self._to_result,
+                response_callback=respGrpc,
                 method=self._connection.grpc_aggregate,
                 request=request,
             )

weaviate/collections/aggregations/over_all/executor.py

@@ -11,6 +11,7 @@
 from weaviate.collections.filters import _FilterToGRPC
 from weaviate.connect import executor
 from weaviate.connect.v4 import ConnectionType
+from weaviate.proto.v1 import aggregate_pb2
 
 
 class _OverAllExecutor(Generic[ConnectionType], _BaseExecutor[ConnectionType]):
@@ -105,8 +106,14 @@ def resp(res: dict) -> Union[AggregateReturn, AggregateGroupByReturn]:
                 limit=group_by.limit if group_by is not None else None,
                 objects_count=total_count,
             )
+
+            def respGrpc(
+                res: aggregate_pb2.AggregateReply,
+            ) -> Union[AggregateReturn, AggregateGroupByReturn]:
+                return self._to_result(group_by is not None, res)
+
             return executor.execute(
-                response_callback=self._to_result,
+                response_callback=respGrpc,
                 method=self._connection.grpc_aggregate,
                 request=request,
             )