Python: Qdrant vector search fails with qdrant-client 1.16+ (search removed) and with single-comparison filters #14561

What happens

QdrantCollection._inner_search in python/semantic_kernel/connectors/qdrant.py has two problems that break Qdrant vector search.

1. AsyncQdrantClient.search no longer exists. The vector search path calls self.qdrant_client.search(...). That method was removed in qdrant-client 1.16.0. I compared the wheels: async def search( is in 1.15.1 and not in 1.16.0, and query_points is in both. The extra is declared as qdrant-client ~= 1.9 (python/pyproject.toml line 139), so a fresh install resolves to 1.19.1 and every vector search fails with:

VectorSearchExecutionException: An error occurred during the search: 'AsyncQdrantClient' object has no attribute 'search'

uv.lock pins 1.12.1, and tests/unit/connectors/memory/test_qdrant.py mocks AsyncQdrantClient.search, so CI does not see it. With qdrant-client 1.16 or newer the existing unit tests error at setup, because patch("...AsyncQdrantClient.search") has nothing to patch. Hybrid search already uses query_points (added in qdrant-client 1.10.0).

2. A single-comparison filter is passed as a bare FieldCondition. A filter such as lambda x: x.temperature > 1 is parsed to a FieldCondition, and _inner_search hands it to Qdrant unchanged:

filters: Filter | list[Filter] | None = self._build_filter(options.filter)  # type: ignore
filter: Filter | None = Filter(must=filters) if filters and isinstance(filters, list) else filters  # type: ignore

Only a list gets wrapped. Qdrant expects a Filter here. The local client fails with 'FieldCondition' object has no attribute 'must', and the qdrant-client request models reject it too (models.Prefetch(filter=FieldCondition(...)) raises ValidationError: Input should be a valid dictionary or instance of Filter). Hybrid search fails the same way at keyword_filter.must. Filters built with and, or or not already return a Filter, so they work. test_search_filter asserts that the bare FieldCondition is passed through.

Where

python/semantic_kernel/connectors/qdrant.py QdrantCollection._inner_search on current main (64005c7), the self.qdrant_client.search( call at line 294 and the filters and filter lines above it.

Steps to reproduce

Uses the in-process Qdrant that ships with qdrant-client, no server needed.

import asyncio
from dataclasses import dataclass
from typing import Annotated

from semantic_kernel.connectors.qdrant import QdrantCollection
from semantic_kernel.data.vector import VectorStoreField, vectorstoremodel


@vectorstoremodel
@dataclass
class Record:
    id: Annotated[int, VectorStoreField("key")]
    temperature: Annotated[int, VectorStoreField("data", is_indexed=True)]
    vector: Annotated[list[float] | None, VectorStoreField("vector", dimensions=2)] = None


async def main():
    collection = QdrantCollection(record_type=Record, collection_name="t", location=":memory:")
    await collection.ensure_collection_exists()
    await collection.upsert([Record(1, 1, [1.0, 0.2]), Record(2, 5, [0.0, 1.0]), Record(3, 9, [1.0, 1.0])])
    for kwargs in ({}, {"filter": "lambda x: x.temperature > 1"}):
        try:
            results = await collection.search(vector=[1.0, 1.0], **kwargs)
            print("search", kwargs, [r.record.id async for r in results.results])
        except Exception as ex:
            print("search", kwargs, type(ex).__name__, ex)


asyncio.run(main())

Actual

On main:

qdrant-client 1.12.1 / 1.15.1
  search {}                                        [3, 1, 2]
  search {'filter': 'lambda x: x.temperature > 1'} VectorSearchExecutionException: ... 'FieldCondition' object has no attribute 'must'
  hybrid_search with the same filter               VectorSearchExecutionException: ... 'FieldCondition' object has no attribute 'must'

qdrant-client 1.16.2 / 1.19.1
  search {}                                        VectorSearchExecutionException: ... 'AsyncQdrantClient' object has no attribute 'search'
  search {'filter': 'lambda x: x.temperature > 1'} VectorSearchExecutionException: ... 'AsyncQdrantClient' object has no attribute 'search'
  hybrid_search with the same filter               VectorSearchExecutionException: ... 'FieldCondition' object has no attribute 'must'

Expected

• Vector search uses query_points(query=vector, using=<vector name or None>, ...) and reads .points, so it works on every qdrant-client release that has query_points (1.10 and newer). The lower bound of the extra becomes ~= 1.10, which hybrid search needs already.
• A single comparison filter is wrapped as Filter(must=[condition]), so x.temperature > 1 returns records 3 and 2 for both search and hybrid_search.

I checked open and closed issues and PRs for Qdrant, query_points, FieldCondition and qdrant-client versions and found nothing covering this. I am opening a PR right after filing this.