env.py•2.36 kB
from logging.config import fileConfig
import sys
from pathlib import Path
import asyncio
from sqlalchemy import engine_from_config
from sqlalchemy import pool
from alembic import context
# Add the project base directory to sys.path for module resolution
BASE_PATH = Path(__file__).resolve().parent.parent
sys.path.insert(0, str(BASE_PATH))
from mcp_host.database.db import Base, async_engine
from mcp_host.core.config import settings
import mcp_host.models
# this is the Alembic Config object, which provides
# access to the values within the .ini file in use.
config = context.config
# Interpret the config file for Python logging.
# This line sets up loggers basically.
if config.config_file_name is not None:
fileConfig(config.config_file_name)
DATABASE_URL = settings.DATABASE_URL
if not DATABASE_URL:
raise ValueError("DATABASE_URL is not set")
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") or DATABASE_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_migrations(sync_connection):
"""
Perform the migration run in 'online' mode.
This function is executed in a synchronous context by SQLAlchemy's run_sync method.
"""
context.configure(
connection=sync_connection,
target_metadata=target_metadata,
)
with context.begin_transaction():
context.run_migrations()
async def run_migrations_online():
"""
Run migrations in 'online' mode using an asynchronous connection.
"""
async with async_engine.connect() as connection:
# Run the synchronous migration function within the async connection context
await connection.run_sync(do_migrations)
if context.is_offline_mode():
run_migrations_offline()
else:
asyncio.run(run_migrations_online())