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_try_argument_to_rest_selector aliased the caller's object and then
assigned to it:
points_selector = points
points_selector.shard_key = ...
_converted is literally the same object, so an application that holds a
selector as a constant and passes shard_key_selector per request has
that constant rewritten by the first call: a later request meant for
tenant A is sent to whichever shard the previous call used.
_try_argument_to_grpc_selector, 50 lines up, reads the embedded key
and returns it separately for exactly this reason. Build a new selector
with construct instead, matching the Filter branch just below, and do
the same in the async twin.
Falsy shard keys are unaffected: 0 is still neither missing nor
dropped, which the existing cluster test asserts and a new offline test
now pins.
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Included review availability: This review used your included allowance. Your plan provides up to 4 included reviews per hour; 3 remain after this review. 📝 WalkthroughWalkthroughSynchronous and asynchronous REST selector conversion now creates a new selector from the input’s explicitly set fields. A supplied shard key overrides the embedded key; otherwise, conversion preserves the embedded key. Tests check that conversion does not mutate the input and cover selectors with no key, falsy keys, filters, and point IDs. A gRPC conversion test checks that the selector retains its embedded key. Priority: ➖ Normal Estimated code review effort: 2 (Simple) | ~10 minutes Change: Bug fix Merge Risk: ⚪ Minimal · up to The selector change appears mergeable after normal checks. No concrete current-head issue was established, though integration behavior was not verified. Security Architecture ReviewSecurity architecture risk: 🔵 Low · up to The change prevents request-specific shard keys from contaminating reused selectors. However, it also makes selector-based REST deletion and payload clearing fail on supported Pydantic v1 installations, potentially blocking data-cleanup workflows. The inspected paths do not introduce greater authority or broader request targets. Retained concerns
Security review detailsSecurity Blast Radius
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Review comments at @qdrant_client/qdrant_remote.py:
- Line 1455: Update the selector-copy logic in the synchronous
`qdrant_remote.py` helper at line 1455 and the asynchronous
`async_qdrant_remote.py` helper at line 1286 to use a
Pydantic-version-compatible copy operation instead of `model_dump()` and
reconstruction. Update the shard key on each copy, preserving the original
selector.
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The declared pydantic range starts at 1.10.8, where the export is `.dict()`. `model_dump()` exists only on v2, so under v1 both REST selector branches raised `AttributeError: 'PointIdsList' object has no attribute 'model_dump'` before `delete` or `clear_payload` sent anything. `_pydantic_compat.to_dict` already dispatches to the right one for the installed version, and it sits next to the `construct` this branch already imports, so both call sites now use the module's own shim.
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Correct on all counts — reproduced under an actual Pydantic v1 install before changing anything. Both branches raised before any request went out: The fix routes both call sites through the module's own shim rather than adding a new one: The 5 that go red on v1 without the fix are the new tests themselves, across both selector types and both converters. One thing worth flagging rather than leaving implicit: CI never installs Pydantic v1. I grepped every workflow and there is no v1 matrix row, so nothing in this repo's CI would have caught this, which is presumably how it got in. That also means the tests I added cannot guard it on their own — they only bite when someone runs the suite under v1, which nothing currently does. I would rather not add a source-inspection test that greps for v2-only API names; it is brittle and asserts on text rather than behaviour. The durable fix is a v1 row in the matrix, but that touches your CI config and broadens this PR, so I have left it alone. Happy to open that as a separate PR if you want it — say the word and I will scope it to just the matrix row plus the install pin. Wider suite, for parity:
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Summary
The REST selector path writes the shard key into the caller's own object, so an application that holds a selector as a constant sends its later requests to the wrong shard.
Why it happens
_try_argument_to_rest_selectoraliases the caller's object and then assigns to it:The alias-and-mutate
The converted selector is the caller's object, not a copy:
Measured
So this shape of application breaks:
The application shape
The gRPC path, 50 lines up in the same class, is the intended contract — it reads the embedded key and returns it as a separate value, and never touches its input:
Two paths, one behaviour, opposite contracts — so the same code is correct over gRPC and wrong over REST, which is the worst shape for a caller to reason about.
What this changes
Build a new selector instead of writing into the input, matching the
models.Filterbranch directly below, which already usesconstruct. Same change inasync_qdrant_remote.py, which had the identical alias-and-mutate.Falsy shard keys are deliberately unaffected:
0is a valid shard key, soshard_key_selector if shard_key_selector is not None else points.shard_keykeeps the precedence the existing cluster test documents.Validation
tests/test_selector_shard_key.py, 12 tests, no Qdrant server needed:Test output
The seven that pass either way are the controls: the request must still carry the explicit key, a selector with no key must still convert, the rest of the selector must survive the copy, and the gRPC path must stay non-mutating.
I also pinned the falsy-shard-key rule offline (
0beats an embedded1; a falsy embedded key survives when no argument is given), becausetest_shard_key_from_points_selectorasserts the same thing but needs a distributed cluster.Also verified:
ruff format --line-length=99 --checkis clean on all three files, andtests/embed_tests+tests/conversionsshow only the pre-existingtest_bm25_corefailure from a missingqdrant_clibinary.Not a duplicate of #1359 (closed, unmerged): that one was about falsy shard keys being discarded via a truthiness fallback, and it landed as #1364. The alias-and-mutate pattern is still present on
master— the line above still readsshard_key_selector if ... else points_selector.shard_key.I did not run the integration tests, which need a live Qdrant server.
All Submissions:
devbranch. Did you create your branch fromdev? — this targetsmaster, the default branch;devdoes not exist on this repository.New Feature Submissions:
pre-commitwithpip3 install pre-commitand set up hooks withpre-commit install?Changes to Core Features: