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Carlos Escalante 9a25c4baab Adopt Alembic: autogenerated baseline, stamp-or-upgrade startup
The baseline (c3da001a0eb3) was autogenerated against an empty Postgres
and schema-diffed against the live dev schema until column-identical
(two model fixes fell out: deferred_to_next_cycle now declares its
server_default, usersettings.data is JSONB on Postgres to match the
live type). Startup replaces init_db/run_migrations with
run_alembic_upgrade(): pre-Alembic databases that already match the
baseline are adopted via stamp; fresh databases build from the
migration. The section is serialized with a pg advisory lock because
prod uvicorn runs 2 workers, each executing the lifespan. Verified:
adoption + idempotent re-run on the dev DB, fresh 13-table build on an
empty DB, full container boot, 55/55 tests. (ARCH-02, BE-19)

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
2026-06-09 20:31:55 -06:00

50 lines
1.3 KiB
Python

from logging.config import fileConfig
from alembic import context
from sqlalchemy import engine_from_config, pool
from sqlmodel import SQLModel
from app.config import settings
import app.models.models # noqa: F401 — register all tables on the metadata
config = context.config
if config.config_file_name is not None:
fileConfig(config.config_file_name)
# Single source of truth for the DB URL: the app settings.
config.set_main_option("sqlalchemy.url", settings.DATABASE_URL)
target_metadata = SQLModel.metadata
def run_migrations_offline() -> None:
context.configure(
url=config.get_main_option("sqlalchemy.url"),
target_metadata=target_metadata,
literal_binds=True,
dialect_opts={"paramstyle": "named"},
)
with context.begin_transaction():
context.run_migrations()
def run_migrations_online() -> None:
connectable = engine_from_config(
config.get_section(config.config_ini_section, {}),
prefix="sqlalchemy.",
poolclass=pool.NullPool,
)
with connectable.connect() as connection:
context.configure(
connection=connection, target_metadata=target_metadata
)
with context.begin_transaction():
context.run_migrations()
if context.is_offline_mode():
run_migrations_offline()
else:
run_migrations_online()