42 lines
1.4 KiB
Python
42 lines
1.4 KiB
Python
"""Project Knowledge Graph evidence model."""
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from __future__ import annotations
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from typing import Any, Optional
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from sqlalchemy import ForeignKey, Integer, TEXT, TIMESTAMP, VARCHAR, func
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from sqlalchemy.orm import Mapped, mapped_column
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from .base import Base
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from .types import JSONB
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class KGEvidence(Base):
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__tablename__ = "kg_evidences"
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id: Mapped[int] = mapped_column(Integer, primary_key=True, autoincrement=True)
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entity_id: Mapped[Optional[int]] = mapped_column(
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Integer,
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ForeignKey("kg_entities.id", ondelete="CASCADE"),
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nullable=True,
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index=True,
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)
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relation_id: Mapped[Optional[int]] = mapped_column(
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Integer,
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ForeignKey("kg_relations.id", ondelete="CASCADE"),
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nullable=True,
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index=True,
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)
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evidence_type: Mapped[str] = mapped_column(VARCHAR(40), nullable=False, index=True)
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content_hash: Mapped[str] = mapped_column(VARCHAR(64), nullable=False, index=True)
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content_excerpt: Mapped[str] = mapped_column(TEXT, nullable=False)
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source_type: Mapped[str] = mapped_column(VARCHAR(32), nullable=False, default="system", index=True)
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source_ref: Mapped[Optional[str]] = mapped_column(VARCHAR(255), nullable=True)
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meta_payload: Mapped[Optional[Any]] = mapped_column("metadata", JSONB, nullable=True)
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occurred_at: Mapped[Optional[TIMESTAMP]] = mapped_column(
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TIMESTAMP,
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nullable=False,
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server_default=func.now(),
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index=True,
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)
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