44 lines
1.7 KiB
Python
44 lines
1.7 KiB
Python
"""ImageProvenance — links an ImageRecord to a Post.
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One image can have many provenance rows — different posts each contribute
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metadata (enrich-on-duplicate rule, spec §3: a downloaded image that is a
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pHash dupe of an existing record gets a NEW provenance row for the new post
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appended, rather than the metadata being dropped). But the (image, post)
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pair is unique — alembic 0021 enforces uq_image_provenance_image_post
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after operator-flagged 2026-05-26 saw _apply_sidecar's existence-check +
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INSERT race plant duplicates that then broke .scalar_one_or_none() on
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every later deep-scan rederive (MultipleResultsFound).
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"""
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from datetime import datetime
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from sqlalchemy import JSON, DateTime, ForeignKey, Integer, UniqueConstraint, func
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from sqlalchemy.orm import Mapped, mapped_column
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from .base import Base
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class ImageProvenance(Base):
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__tablename__ = "image_provenance"
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__table_args__ = (
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UniqueConstraint(
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"image_record_id", "post_id",
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name="uq_image_provenance_image_post",
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),
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)
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id: Mapped[int] = mapped_column(Integer, primary_key=True)
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image_record_id: Mapped[int] = mapped_column(
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ForeignKey("image_record.id", ondelete="CASCADE"), nullable=False, index=True
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)
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post_id: Mapped[int] = mapped_column(
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ForeignKey("post.id", ondelete="CASCADE"), nullable=False, index=True
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)
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source_id: Mapped[int] = mapped_column(
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ForeignKey("source.id", ondelete="CASCADE"), nullable=False, index=True
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)
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captured_metadata: Mapped[dict | None] = mapped_column(JSON, nullable=True)
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captured_at: Mapped[datetime] = mapped_column(
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DateTime(timezone=True), nullable=False, server_default=func.now()
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)
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