mirror of
https://github.com/aljazceru/nutshell.git
synced 2025-12-20 02:24:20 +01:00
52 lines
1.9 KiB
Python
52 lines
1.9 KiB
Python
import re
|
|
|
|
from loguru import logger
|
|
|
|
from core.db import COCKROACH, POSTGRES, SQLITE, Database
|
|
|
|
|
|
async def migrate_databases(db: Database, migrations_module):
|
|
"""Creates the necessary databases if they don't exist already; or migrates them."""
|
|
|
|
async def set_migration_version(conn, db_name, version):
|
|
await conn.execute(
|
|
"""
|
|
INSERT INTO dbversions (db, version) VALUES (?, ?)
|
|
ON CONFLICT (db) DO UPDATE SET version = ?
|
|
""",
|
|
(db_name, version, version),
|
|
)
|
|
|
|
async def run_migration(db, migrations_module):
|
|
db_name = migrations_module.__name__.split(".")[-2]
|
|
for key, migrate in migrations_module.__dict__.items():
|
|
match = match = matcher.match(key)
|
|
if match:
|
|
version = int(match.group(1))
|
|
if version > current_versions.get(db_name, 0):
|
|
await migrate(db)
|
|
|
|
if db.schema == None:
|
|
await set_migration_version(db, db_name, version)
|
|
else:
|
|
async with db.connect() as conn:
|
|
await set_migration_version(conn, db_name, version)
|
|
|
|
async with db.connect() as conn:
|
|
if conn.type == SQLITE:
|
|
exists = await conn.fetchone(
|
|
"SELECT * FROM sqlite_master WHERE type='table' AND name='dbversions'"
|
|
)
|
|
elif conn.type in {POSTGRES, COCKROACH}:
|
|
exists = await conn.fetchone(
|
|
"SELECT * FROM information_schema.tables WHERE table_name = 'dbversions'"
|
|
)
|
|
|
|
if not exists:
|
|
await migrations_module.m000_create_migrations_table(conn)
|
|
|
|
rows = await (await conn.execute("SELECT * FROM dbversions")).fetchall()
|
|
current_versions = {row["db"]: row["version"] for row in rows}
|
|
matcher = re.compile(r"^m(\d\d\d)_")
|
|
await run_migration(conn, migrations_module)
|