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fix: coerce low combined_risk_level to medium instead of rejecting #210

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fix: coerce low combined_risk_level to medium instead of rejecting #210

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c100215
bugfix: coerce low combined_risk_level to leave_as_is instead of reje…
asteier2026 Jul 2, 2026
a4d8724
bugfix: promote combined_risk_level to medium instead of suppressing …
asteier2026 Jul 2, 2026
1d3d689
fix: log warning when combined_risk_level is promoted due to LLM inco…
asteier2026 Jul 2, 2026
6ee088a
test: parametrize low-risk coercion test over all four protection met…
asteier2026 Jul 2, 2026
e5a4b05
fix: redact entity_value from coercion warning log to avoid PII exposure
asteier2026 Jul 29, 2026
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15 changes: 12 additions & 3 deletions src/anonymizer/engine/schemas/rewrite.py
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Original file line number Diff line number Diff line change
Expand Up @@ -38,10 +38,13 @@

from __future__ import annotations

import logging
from enum import Enum

from pydantic import BaseModel, ConfigDict, Field, ValidationInfo, model_validator

logger = logging.getLogger("anonymizer.schemas.rewrite")

# ---------------------------------------------------------------------------
# Domain
# ---------------------------------------------------------------------------
Expand Down Expand Up @@ -150,10 +153,16 @@ def _validate_protection_consistency(self) -> EntityDispositionSchema:
self.combined_risk_level == CombinedRiskLevel.low
and self.protection_method_suggestion != ProtectionMethod.leave_as_is
):
raise ValueError(
f"Entity {self.id}: combined_risk_level='low' requires protection_method_suggestion='leave_as_is', "
f"got '{self.protection_method_suggestion}'"
logger.warning(
"Entity %d (label=%r): combined_risk_level='low' conflicts with "
"protection_method_suggestion=%r; promoting risk to 'medium'.",
self.id,
self.entity_label,
self.protection_method_suggestion,
)
# Trust the protection intent over the risk label; promote risk to medium
# rather than suppressing the protection.
self.combined_risk_level = CombinedRiskLevel.medium
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asteier2026 marked this conversation as resolved.

@lipikaramaswamy lipikaramaswamy Aug 10, 2026

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Non-blocking: because model_config uses use_enum_values=True, normally validated combined_risk_level values are stored and returned by model_dump() as plain strings. This assignment happens after validation, so the coerced path instead stores a CombinedRiskLevel enum object (although it compares equal to "medium"). Could we assign CombinedRiskLevel.medium.value here and add a model_dump() assertion so coerced and non-coerced records preserve the same serialization contract?

@asteier2026 asteier2026 Aug 11, 2026

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Made suggested changs.

if (
self.combined_risk_level == CombinedRiskLevel.high
and self.protection_method_suggestion == ProtectionMethod.leave_as_is
Expand Down
12 changes: 7 additions & 5 deletions tests/engine/test_schemas.py
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Original file line number Diff line number Diff line change
Expand Up @@ -244,11 +244,13 @@ def mixed_disposition() -> SensitivityDispositionSchema:
# EntityDispositionSchema — protection consistency


def test_entity_disposition_invalid_low_risk_but_not_leave_as_is() -> None:
with pytest.raises(ValidationError, match="combined_risk_level='low'"):
EntityDispositionSchema.model_validate(
_make_entity(combined_risk_level="low", protection_method_suggestion="replace")
)
@pytest.mark.parametrize("method", ["replace", "generalize", "remove", "suppress_inference"])
def test_entity_disposition_low_risk_non_leave_as_is_promotes_risk_to_medium(method: str) -> None:
entity = EntityDispositionSchema.model_validate(
_make_entity(combined_risk_level="low", protection_method_suggestion=method)
)
assert entity.combined_risk_level == "medium"
assert entity.protection_method_suggestion == method


def test_entity_disposition_invalid_high_risk_but_leave_as_is() -> None:
Expand Down
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