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FabledCurator/backend/app/models/head_metric.py
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db: reconcile the models with the deployed schema (#3275)
Milestone 328's acceptance test compared a database built by the real
0001..0087 chain against one built from the models, and found ~130
places where they disagree. This closes them.

Almost all were the MODEL being wrong, so almost all of this is model
edits with no DDL — the database already had these things, nothing in it
changes, and no deploy is needed for this part:

* 92 columns gained server_default. The models carried Python-side
  `default=` only, so the ORM filled the value and the column had no
  database default. Anything inserting outside the ORM behaved
  differently from production.

* Eleven indexes that existed only in migrations are now declared:
  the three backup_run reporting indexes, the two date-ordered
  image_record browse indexes, import_task and presentation_review,
  and the three task_run history indexes. All use text() for their DESC
  ordering and postgresql_where for the partial one.

* Two UNIQUE indexes that autogenerate silently proposed DROPPING,
  because neither is expressible as a UniqueConstraint:
    uq_tag_name_kind_fandom  — an EXPRESSION index over
                               (name, kind, COALESCE(fandom_id, 0))
    uq_post_artist_external_id_null_source — PARTIAL, WHERE source_id
                               IS NULL
  post.py already had a comment describing the second one. The comment
  was right; nothing declared it.

* The two external_link enum CHECKs (host, status) — rule 36 territory,
  and absent from the model entirely.

* Two indexes were named explicitly. A bare index=True generated
  ix_tag_alias_canonical_tag_id where the database has
  ix_tag_alias_canonical, so autogenerate proposed a drop+create of an
  index that was already there under another name. Same for
  tag_suggestion_rejection.

Only ONE thing needed DDL, as 0088: tag.fandom_id is declared
index=True but no migration ever created that index.

Deliberately NOT here: image_record.sha256. The model says unique=True;
0001 created a plain index. Duplicates are possible today and the ORM
believes otherwise. The fix depends on whether duplicates already exist
— if they do, that is a dedupe decision, not a constraint — so it waits
on an answer about live data.

The real severity of #3275 is not the squash. It is that --autogenerate
has been unsafe on this project: run against the old models it would
have proposed dropping eleven indexes and two uniqueness guarantees.
2026-08-30 14:42:30 -04:00

33 lines
1.4 KiB
Python

"""HeadMetric — running correction counters per concept (#114 observability).
Earned auto-apply fires graduated heads; to TUNE it we need to know how often a
head's auto-applied tag was wrong (the operator removed it = a MISFIRE) and how
often the operator had to add a tag a head exists for by hand (an UNDER-FIRE,
the head missed it). image_tag.source is lost when a row is deleted, so these
are captured as durable cumulative counters at correction time — they survive
head retrain/prune (keyed by tag, not by the head row). The daily snapshot reads
them into the time-series.
"""
from datetime import datetime
from sqlalchemy import DateTime, ForeignKey, Integer, func
from sqlalchemy.orm import Mapped, mapped_column
from .base import Base
class HeadMetric(Base):
__tablename__ = "head_metric"
tag_id: Mapped[int] = mapped_column(
ForeignKey("tag.id", ondelete="CASCADE"), primary_key=True
)
# An auto-applied (source='head_auto') tag the operator later REMOVED.
n_misfires: Mapped[int] = mapped_column(Integer, nullable=False, default=0, server_default="0")
# A tag with a head that the operator added by HAND (the head missed it).
n_underfires: Mapped[int] = mapped_column(Integer, nullable=False, default=0, server_default="0")
updated_at: Mapped[datetime] = mapped_column(
DateTime(timezone=True), nullable=False, server_default=func.now()
)