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"""
SAAP Database Migrations - Alembic Environment
Production-ready database migration configuration
"""
import asyncio
import os
import sys
from logging.config import fileConfig
from sqlalchemy import engine_from_config, pool
from sqlalchemy.ext.asyncio import AsyncEngine
from alembic import context
# Add the backend directory to Python path
sys.path.append(os.path.join(os.path.dirname(__file__), '..', '..'))
# Import SAAP models and settings
from database.models import Base
from config.settings import settings
# this is the Alembic Config object
config = context.config
# Interpret the config file for Python logging
if config.config_file_name is not None:
fileConfig(config.config_file_name)
# Set SQLAlchemy URL from environment/settings
config.set_main_option("sqlalchemy.url", settings.get_database_url())
# add your model's MetaData object here for 'autogenerate' support
target_metadata = Base.metadata
def run_migrations_offline() -> None:
"""Run migrations in 'offline' mode.
This configures the context with just a URL
and not an Engine, though an Engine is acceptable
here as well. By skipping the Engine creation
we don't even need a DBAPI to be available.
Calls to context.execute() here emit the given string to the
script output.
"""
url = config.get_main_option("sqlalchemy.url")
context.configure(
url=url,
target_metadata=target_metadata,
literal_binds=True,
dialect_opts={"paramstyle": "named"},
)
with context.begin_transaction():
context.run_migrations()
def do_run_migrations(connection):
"""Run migrations with database connection"""
context.configure(connection=connection, target_metadata=target_metadata)
with context.begin_transaction():
context.run_migrations()
async def run_migrations_online() -> None:
"""Run migrations in 'online' mode.
In this scenario we need to create an Engine
and associate a connection with the context.
"""
connectable = AsyncEngine(
engine_from_config(
config.get_section(config.config_ini_section),
prefix="sqlalchemy.",
poolclass=pool.NullPool,
)
)
async with connectable.connect() as connection:
await connection.run_sync(do_run_migrations)
await connectable.dispose()
if context.is_offline_mode():
run_migrations_offline()
else:
asyncio.run(run_migrations_online()) |