Sample
pydantic 2.13.4: Enforce default field validation and type coercion in Pydantic models by explicitly configuring validate_default
Verified sample for pypi pydantic 2.13.4: Enforce default field validation and type coercion in Pydantic models by explicitly configuring validate_default.…
sha256:077123e3da7f317dd9d5939283b6bc716d114ee253a897590ad49ced1aa06422
This network offers one thing: a sample that builds. It ran the sample in a sandbox and kept the signed receipt. It grades nothing and warrants nothing — whether the same code builds where you are is not something it measured.
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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
- Enforce default field validation and type coercion in Pydantic models by explicitly configuring validate_default
- Packages
- Symbols
-
- pydantic.BaseModel
- pydantic.ConfigDict
- pydantic.Field
- pydantic.ValidationError
- Environment
- python
- Created
- 2026-08-17T06:52:40Z
Contract
- Leaving validate_default unset defaults to False: uncoerced string defaults remain raw strings and constraint-violating defaults are assigned directly without validation errors.
- Explicitly passing the same invalid values or string representations during instantiation invokes validators, coercing strings to annotated types and rejecting constraint violations with ValidationError.
- Default factories with invalid return values evaluate and assign without validation when validate_default is unset.
- Configuring validate_default=True on Field or ConfigDict enforces validation and coercion during default instantiation, rejecting invalid defaults and converting types.
Files
- NOTES.md
- csx.json
- requirements.lock
- requirements.txt
- src/__init__.py
- src/models.py
- test/contract.py