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migrations

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- handles the case where the first db that was not versioned with alembic by applying the version info
  - will migrate on start to ensure db is always caught up with the latest
This commit is contained in:
mcinj 2022-05-19 22:01:12 -04:00
parent 5c30089b72
commit 3670d1522f
1 changed files with 27 additions and 4 deletions
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29
src/database.py
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@ -6,6 +6,7 @@ from alembic.config import Config
from dateutil import tz
from sqlalchemy import func
from sqlalchemy.orm import Session
from sqlalchemy_utils import database_exists
import log
from models import TableNotification, TableGiveaway, TableSteamItem
@ -19,14 +20,36 @@ def create_engine(db_url: str):
if not engine:
engine = sqlalchemy.create_engine(db_url, echo=False)
engine.connect()
return engine
def run_migrations(script_location: str, dsn: str) -> None:
logger.info('Running DB migrations in %r on %r', script_location, dsn)
def run_migrations(script_location: str, db_url: str) -> None:
logger.debug('Running DB migrations in %r on %r', script_location, db_url)
alembic_cfg = Config()
alembic_cfg.set_main_option('script_location', script_location)
alembic_cfg.set_main_option('sqlalchemy.url', dsn)
alembic_cfg.set_main_option('sqlalchemy.url', db_url)
if not database_exists(db_url):
logger.debug(f"'{db_url}' does not exist. Running normal migration to create db and tables." )
command.upgrade(alembic_cfg, 'head')
if database_exists(db_url):
logger.debug(f"'{db_url} exists.")
e = create_engine(db_url)
insp = sqlalchemy.inspect(e)
alembic_version_table_name = 'alembic_version'
has_alembic_table = insp.has_table(alembic_version_table_name)
if has_alembic_table:
logger.debug(f"Table '{alembic_version_table_name}' exists.")
else:
logger.debug(f"Table '{alembic_version_table_name}' doesn't exist so assuming it was created pre-alembic "
f"setup. Setting the version to the first version created prior to alembic setup.")
alembic_first_ref = '1da33402b659'
command.stamp(alembic_cfg, alembic_first_ref)
logger.debug("Running migration.")
command.upgrade(alembic_cfg, 'head')
class NotificationHelper: