bvandeusenandClaude Opus 5
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Run 5026 got the models-vs-chain diff to 7 lines. Three findings, and one
of them reverses an assumption I made in the previous commit.
The doubled CHECK names are what the DATABASE has, not what the generator
invented. base.py's convention is ck_%(table_name)s_%(constraint_name)s,
which — unlike uq/fk/ix — applies even to a constraint that already has a
name, so four migrations that passed an already-prefixed name got it
prefixed twice:
ck_import_settings_ck_import_settings_singleton
ck_ml_settings_ck_ml_settings_singleton
ck_post_ck_post_translation_override
ck_tag_ck_tag_fandom_requires_character
The workflow repair added last commit is still correct and still needed —
autogenerate really does re-double a name on the round trip — but it was
making the MODELS side clean against a chain that is dirty. The
comment in ml_settings.py claiming its bare name "matches migration 0003"
was simply false; 0003 produces the doubled form.
Nothing reads a CHECK constraint by name, so this has never done harm.
But it is precisely the development-era residue the collapsed baseline
exists to leave behind, and a public schema should not ship it — so 0088
renames the deployed constraints and all six models now declare bare
names. RENAME CONSTRAINT is catalog-only: no scan, no rewrite, no
revalidation, which is why this is safe on post and tag. Guarded on
pg_constraint scoped by conrelid, so it is a no-op on a database built
from the models.
ix_tag_fandom_id showed as a difference only because chain_ref was pinned
to 0a5bbe8, which predates 0088 — the comparison was measuring the models
against a chain missing the migration that closes the gap. chain_ref now
defaults to blank, meaning "the chain in this ref". Pin it to a commit
only after the collapse, when the tree no longer carries the revisions.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_017QHszn9H8VBvx5Ke8x1hvw
89 lines
3.5 KiB
Python
89 lines
3.5 KiB
Python
"""ExternalLink — an off-platform file-host link found in a post body.
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Creators host the actual files (films, packs) on mega.nz / Google Drive /
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MediaFire / Dropbox / Pixeldrain and drop the link in the post text. This row
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is the record that the link existed (so nothing is silently dropped), the
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dedup + dead-letter ledger for fetching it, and the driver the download worker
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walks. `url` keeps the FULL link including the `#fragment` (mega's decryption
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key) — truncating it makes the file undownloadable.
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status lifecycle: pending → downloading → downloaded | failed | dead
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(too many attempts) | skipped (host disabled). `attachment_id` links the
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captured file once a download lands (SET NULL so deleting the attachment
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doesn't delete the link record).
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"""
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from datetime import datetime
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from sqlalchemy import (
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CheckConstraint,
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DateTime,
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Float,
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ForeignKey,
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Index,
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Integer,
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String,
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Text,
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func,
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text,
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)
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from sqlalchemy.orm import Mapped, mapped_column
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from .base import Base
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# Kept in sync with link_extract.SUPPORTED_HOSTS and the CHECK in migration 0049.
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HOSTS = ("mega", "gdrive", "mediafire", "dropbox", "pixeldrain")
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STATUSES = ("pending", "downloading", "downloaded", "failed", "skipped", "dead")
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class ExternalLink(Base):
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__tablename__ = "external_link"
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__table_args__ = (
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# alembic 0028 enum CHECKs. Rule 36 territory: a new host or status value
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# needs its constraint swapped in the same migration (#3275).
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CheckConstraint(
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"host IN ('mega', 'gdrive', 'mediafire', 'dropbox', 'pixeldrain')",
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# Bare name: Base.metadata's naming convention prepends
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# ck_<table>_. Pre-prefixing it here doubles the prefix — see
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# alembic 0088, which renames the four constraints that shipped
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# that way (#3275).
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name="host",
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),
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CheckConstraint(
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"status IN ('pending', 'downloading', 'downloaded', 'failed', 'skipped', 'dead')",
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name="status",
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),
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# One row per (post, url). The full url (incl. #fragment) is the identity
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# — the same file linked twice in a post collapses to one row.
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Index("uq_external_link_post_url", "post_id", "url", unique=True),
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Index("ix_external_link_status", "status"),
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)
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id: Mapped[int] = mapped_column(Integer, primary_key=True)
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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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artist_id: Mapped[int | None] = mapped_column(
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ForeignKey("artist.id", ondelete="SET NULL"), nullable=True, index=True
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)
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host: Mapped[str] = mapped_column(String(16), nullable=False)
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url: Mapped[str] = mapped_column(Text, nullable=False)
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label: Mapped[str | None] = mapped_column(Text, nullable=True)
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status: Mapped[str] = mapped_column(
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String(16), nullable=False, server_default="pending"
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)
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attempts: Mapped[int] = mapped_column(
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Integer, nullable=False, server_default=text("0")
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)
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last_error: Mapped[str | None] = mapped_column(Text, nullable=True)
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attachment_id: Mapped[int | None] = mapped_column(
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ForeignKey("post_attachment.id", ondelete="SET NULL"), nullable=True
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)
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created_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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completed_at: Mapped[datetime | None] = mapped_column(
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DateTime(timezone=True), nullable=True
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)
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duration_seconds: Mapped[float | None] = mapped_column(Float, nullable=True)
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