fix: read_index_endpoint private endpoint support.

PiperOrigin-RevId: 589880026

Author: lingyinw

google/cloud/aiplatform/matching_engine/matching_engine_index_endpoint.py

@@ -1285,24 +1285,32 @@ def read_index_datapoints(
         """
         if not self._public_match_client:
             # Call private match service stub with BatchGetEmbeddings request
-            response = self._batch_get_embeddings(
+            embeddings = self._batch_get_embeddings(
                 deployed_index_id=deployed_index_id, ids=ids
             )
-            return [
-                gca_index_v1beta1.IndexDatapoint(
+
+            response = []
+            for embedding in embeddings:
+                index_datapoint = gca_index_v1beta1.IndexDatapoint(
                     datapoint_id=embedding.id,
                     feature_vector=embedding.float_val,
-                    restricts=gca_index_v1beta1.IndexDatapoint.Restriction(
-                        namespace=embedding.restricts.name,
-                        allow_list=embedding.restricts.allow_tokens,
-                    ),
-                    deny_list=embedding.restricts.deny_tokens,
-                    crowding_attributes=gca_index_v1beta1.CrowdingEmbedding(
-                        str(embedding.crowding_tag)
-                    ),
+                    restricts=[
+                        gca_index_v1beta1.IndexDatapoint.Restriction(
+                            namespace=restrict.name,
+                            allow_list=restrict.allow_tokens,
+                            deny_list=restrict.deny_tokens,
+                        )
+                        for restrict in embedding.restricts
+                    ],
                 )
-                for embedding in response.embeddings
-            ]
+                if embedding.crowding_attribute:
+                    index_datapoint.crowding_tag = (
+                        gca_index_v1beta1.IndexDatapoint.CrowdingTag(
+                            crowding_attribute=str(embedding.crowding_attribute)
+                        )
+                    )
+                response.append(index_datapoint)
+            return response
 
         # Create the ReadIndexDatapoints request
         read_index_datapoints_request = (
@@ -1326,7 +1334,7 @@ def _batch_get_embeddings(
         *,
         deployed_index_id: str,
         ids: List[str] = [],
-    ) -> List[List[match_service_pb2.Embedding]]:
+    ) -> List[match_service_pb2.Embedding]:
         """
         Reads the datapoints/vectors of the given IDs on the specified index
         which is deployed to private endpoint.

tests/unit/aiplatform/test_matching_engine_index_endpoint.py

@@ -246,6 +246,26 @@
 _TEST_RETURN_FULL_DATAPOINT = True
 _TEST_ENCRYPTION_SPEC_KEY_NAME = "kms_key_name"
 _TEST_PROJECT_ALLOWLIST = ["project-1", "project-2"]
+_TEST_READ_INDEX_DATAPOINTS_RESPONSE = [
+    gca_index_v1beta1.IndexDatapoint(
+        datapoint_id="1",
+        feature_vector=[0.1, 0.2, 0.3],
+        restricts=[
+            gca_index_v1beta1.IndexDatapoint.Restriction(
+                namespace="class",
+                allow_list=["token_1"],
+                deny_list=["token_2"],
+            )
+        ],
+    ),
+    gca_index_v1beta1.IndexDatapoint(
+        datapoint_id="2",
+        feature_vector=[0.5, 0.2, 0.3],
+        crowding_tag=gca_index_v1beta1.IndexDatapoint.CrowdingTag(
+            crowding_attribute="1"
+        ),
+    ),
+]
 
 
 def uuid_mock():
@@ -505,7 +525,13 @@ def index_endpoint_batch_get_embeddings_mock():
                     match_service_pb2.Embedding(
                         id="1",
                         float_val=[0.1, 0.2, 0.3],
-                        crowding_attribute=1,
+                        restricts=[
+                            match_service_pb2.Namespace(
+                                name="class",
+                                allow_tokens=["token_1"],
+                                deny_tokens=["token_2"],
+                            )
+                        ],
                     ),
                     match_service_pb2.Embedding(
                         id="2",
@@ -1249,3 +1275,25 @@ def test_index_endpoint_batch_get_embeddings(
         )
 
         index_endpoint_batch_get_embeddings_mock.assert_called_with(batch_request)
+
+    @pytest.mark.usefixtures("get_index_endpoint_mock")
+    def test_index_endpoint_find_neighbors_for_private(
+        self, index_endpoint_batch_get_embeddings_mock
+    ):
+        aiplatform.init(project=_TEST_PROJECT)
+
+        my_index_endpoint = aiplatform.MatchingEngineIndexEndpoint(
+            index_endpoint_name=_TEST_INDEX_ENDPOINT_ID
+        )
+
+        response = my_index_endpoint.read_index_datapoints(
+            deployed_index_id=_TEST_DEPLOYED_INDEX_ID, ids=["1", "2"]
+        )
+
+        batch_request = match_service_pb2.BatchGetEmbeddingsRequest(
+            deployed_index_id=_TEST_DEPLOYED_INDEX_ID, id=["1", "2"]
+        )
+
+        index_endpoint_batch_get_embeddings_mock.assert_called_with(batch_request)
+
+        assert response == _TEST_READ_INDEX_DATAPOINTS_RESPONSE