feat(provenance): image_record.artist_id + 0008 backfill/drop-artist-tags

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
2026-05-18 21:33:11 -04:00
parent 8fe1994d8e
commit 63e7185811
4 changed files with 238 additions and 0 deletions
@@ -0,0 +1,52 @@
+"""fc2d-vii-c: image_record.artist_id + backfill + drop artist tags
+
+Revision ID: 0008
+Revises: 0007
+Create Date: 2026-05-18
+
+Internal forward-correctness migration (the big legacy-import migration
+stays deferred). downgrade() does NOT recreate deleted artist tags;
+downgrade is dev-only and the data is reconstructable by re-import.
+"""
+from typing import Sequence, Union
+
+import sqlalchemy as sa
+from alembic import op
+
+from backend.app.utils.artist_backfill import (
+    BACKFILL_PRIMARY_SQL,
+    BACKFILL_PROVENANCE_SQL,
+    BACKFILL_TAG_SQL,
+    DELETE_ARTIST_TAGS_SQL,
+)
+
+revision: str = "0008"
+down_revision: Union[str, None] = "0007"
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    op.add_column(
+        "image_record",
+        sa.Column("artist_id", sa.Integer(), nullable=True),
+    )
+    op.create_foreign_key(
+        "fk_image_record_artist_id", "image_record", "artist",
+        ["artist_id"], ["id"], ondelete="SET NULL",
+    )
+    op.create_index(
+        "ix_image_record_artist_id", "image_record", ["artist_id"],
+    )
+    op.execute(BACKFILL_PRIMARY_SQL)
+    op.execute(BACKFILL_PROVENANCE_SQL)
+    op.execute(BACKFILL_TAG_SQL)
+    op.execute(DELETE_ARTIST_TAGS_SQL)
+
+
+def downgrade() -> None:
+    op.drop_index("ix_image_record_artist_id", table_name="image_record")
+    op.drop_constraint(
+        "fk_image_record_artist_id", "image_record", type_="foreignkey"
+    )
+    op.drop_column("image_record", "artist_id")