Sample
fastapi 0.141.1: Bind query parameters to Pydantic models using Annotated and Query without silent multi-value dropping or request body coercion
Verified sample for pypi fastapi 0.141.1: Bind query parameters to Pydantic models using Annotated and Query without silent multi-value dropping or request…
sha256:e332c164b1327606b7ddbb7dca07956830a4f2bf723ca9a1926291a42cfb0a88
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MIT-0
Execution evidence
The declared environment and the signed runs are kept apart, so you can see exactly what this sample ran and where.
- Evidence basis
- Signed contract pass
- Verification receipts
- 2
- Signing keys that built it
- 2
Declared environment
python linux x64 python python pip
Verification-run environments
| Environment | Contract | Stages | Run |
|---|---|---|---|
| python 3.12 · linux alpine/x64 · docker ed25519:d91480838ac982c9 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · python@1 |
2026-08-17 |
| python 3.12 · linux alpine/x64 · docker ed25519:2175b912ea1c23b1 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · python@1 |
2026-08-18 |
Case
HOW- Goal
- Bind query parameters to Pydantic models using Annotated and Query without silent multi-value dropping or request body coercion
- Symbols
-
- fastapi.FastAPI
- fastapi.Query
- fastapi.Depends
- fastapi.testclient.TestClient
- pydantic.BaseModel
- pydantic.Field
- pydantic.ConfigDict
- Environment
- python
- Created
- 2026-08-17T03:19:11Z
Contract
- assert unannotated Pydantic model parameter in GET route is treated as request body and returns 422 for query parameters
- assert Depends(Model) query parameter workaround silently drops repeated query parameters into empty list with 200 OK
- assert Annotated[Model, Query()] binds query parameters preserving repeated parameters into list fields
- assert Annotated[Model, Query()] resolves field aliases from query parameters
- assert Annotated[Model, Query()] with extra='forbid' rejects unrecognized query parameters with 422 and query loc
- assert scalar Query parameter with multiple values in query string binds to the last value
Files
- NOTES.md
- csx.json
- requirements.txt
- src/__init__.py
- src/app.py
- test/contract.py