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shopdb-flask/plugins/notifications/migrations/versions/0002_index_businessunitid.py
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DB review fixes: drop redundant indexes + dead column, add CI MySQL-upgrade job
From the database review (verdict: sound-with-minor-issues). Applies the
actionable findings.

Redundant indexes: five non-unique secondary indexes duplicated a named idx_*
or a unique index on the same column - ix_communications_assetid,
ix_computers_hostname, ix_networkdevices_hostname, ix_printers_hostname (each
shadowing an idx_*), and idx_usb_serial (shadowing the serialnumber unique
index). Removed the redundant index source from the models (column index=True /
the extra db.Index) and added core migration 7d25 dropping the live duplicates.
The unique ix_*_assetid indexes are kept (they enforce assetid uniqueness).

Dead column: usbcheckouts.machineid was a NOT NULL soft-ref to the retired
machines table storing sentinel 0 (ADR-001). Dropped from the model + the
machineid=0 literal in selfhosted checkout; usb plugin migration 0002 drops it
live (downgrade restores it default 0).

Index: notifications.businessunitid (filtered by the shopfloor feed) was
unindexed; added index=True + notifications migration 0002.

CI: new migrations-mysql job proves the real multi-site deploy path - fresh
`flask db upgrade` + per-plugin install on utf8mb4 MySQL from empty, asserting
table count + charset and a clean second-run no-op. The pytest suite only
exercises SQLite create_all(), so a regression in the Alembic chain on MySQL
would otherwise ship undetected.

Verified: fresh core upgrade on a scratch utf8mb4 MySQL builds clean + no-op on
rerun (redundant indexes absent, unique assetid kept); plugin migrations applied
+ verified on the dev DB (machineid gone, bu index present). 953 backend tests
pass; naming + pyflakes green.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
2026-07-13 09:29:45 -04:00

43 lines
1.1 KiB
Python

"""Index notifications.businessunitid (shopfloor list route filters on it).
businessunitid is a soft-ref column the shopfloor feed filters by; it had no
index. Add ix_notifications_businessunitid (matches the model's index=True).
Idempotent; downgrade drops it.
Revision ID: notifications0002buidx
Revises: notifications0001anchor
"""
from alembic import op
import sqlalchemy as sa
revision = 'notifications0002buidx'
down_revision = 'notifications0001anchor'
branch_labels = None
depends_on = None
_INDEX = 'ix_notifications_businessunitid'
def _index_names(insp, table):
return {i['name'] for i in insp.get_indexes(table)}
def upgrade():
bind = op.get_bind()
insp = sa.inspect(bind)
if 'notifications' not in insp.get_table_names():
return
if _INDEX not in _index_names(insp, 'notifications'):
op.create_index(_INDEX, 'notifications', ['businessunitid'])
def downgrade():
bind = op.get_bind()
insp = sa.inspect(bind)
if 'notifications' not in insp.get_table_names():
return
if _INDEX in _index_names(insp, 'notifications'):
op.drop_index(_INDEX, table_name='notifications')