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FabledCurator/backend/app/models/post.py
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feat(translation): Post translation columns + settings + migration (#143 step 1)
Post gains post_title_translated / description_translated / translated_source_lang
/ translation_engine_version / translated_at — filled by the translate sweep so
viewing is instant. ImportSettings gains translation_enabled (OFF by default),
interpreter_base_url (EMPTY — no default host; the operator points it at their own
Interpreter proxy behind a reverse proxy) and translation_target_lang (en),
exposed + validated via /settings/import. Migration 0083. Settings defaults +
patch + validation test.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01CDgx8bQS5YrGRK76v8HUnM
2026-07-07 12:20:31 -04:00

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3.2 KiB
Python

"""Post — provenance anchor for one creator post (may contain many images).
`source_id` is nullable since alembic 0030 — filesystem-imported posts
with no live subscription have NULL source_id. `artist_id` is the
denormalized always-present link to the creator (added in 0030 so
artist-filter queries don't depend on the Source detour).
"""
from datetime import datetime
from sqlalchemy import JSON, DateTime, ForeignKey, Integer, String, Text, UniqueConstraint, func
from sqlalchemy.orm import Mapped, mapped_column
from .base import Base
class Post(Base):
__tablename__ = "post"
__table_args__ = (
# Source-bound dedup. Postgres treats NULL != NULL so rows
# with source_id IS NULL aren't deduped by this constraint;
# the partial unique index `uq_post_artist_external_id_null_source`
# (created in alembic 0030) covers that case via
# (artist_id, external_post_id).
UniqueConstraint("source_id", "external_post_id", name="uq_post_source_external_id"),
)
id: Mapped[int] = mapped_column(Integer, primary_key=True)
source_id: Mapped[int | None] = mapped_column(
ForeignKey("source.id", ondelete="SET NULL"), nullable=True, index=True
)
# Denormalized; always equals source.artist_id when source_id is set
# (the importer is responsible for keeping them consistent on insert).
# Filter queries (artist detail, artist-scoped posts feed) use this
# directly instead of joining through Source.
artist_id: Mapped[int] = mapped_column(
ForeignKey("artist.id", ondelete="CASCADE"),
nullable=False, index=True,
)
external_post_id: Mapped[str] = mapped_column(String(128), nullable=False)
post_url: Mapped[str | None] = mapped_column(Text, nullable=True)
post_title: Mapped[str | None] = mapped_column(Text, nullable=True)
post_date: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)
raw_metadata: Mapped[dict | None] = mapped_column(JSON, nullable=True)
description: Mapped[str | None] = mapped_column(Text, nullable=True)
attachment_count: Mapped[int | None] = mapped_column(Integer, nullable=True)
# -- Post-text translation (milestone 143). Filled by the translate_posts
# sweep via the Interpreter LAN service so viewing is instant.
# translated_source_lang is the DETECTED original language; "en" (or a
# passthrough) means nothing to translate and the *_translated columns stay
# NULL. engine_version keys the Interpreter cache — re-runs are ~1ms and a
# model upgrade re-translates instead of serving stale.
post_title_translated: Mapped[str | None] = mapped_column(Text, nullable=True)
description_translated: Mapped[str | None] = mapped_column(Text, nullable=True)
translated_source_lang: Mapped[str | None] = mapped_column(
String(8), nullable=True
)
translation_engine_version: Mapped[str | None] = mapped_column(
String(128), nullable=True
)
translated_at: Mapped[datetime | None] = mapped_column(
DateTime(timezone=True), nullable=True
)
downloaded_at: Mapped[datetime] = mapped_column(
DateTime(timezone=True), nullable=False, server_default=func.now()
)