115 lines
3.0 KiB
Python
115 lines
3.0 KiB
Python
"""
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Alembic environment configuration for async SQLAlchemy
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"""
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from logging.config import fileConfig
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from sqlalchemy import pool
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from sqlalchemy.engine import Connection
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from sqlalchemy.ext.asyncio import async_engine_from_config
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from alembic import context
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# Import settings and models
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import sys
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from pathlib import Path
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# Add project root to path
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project_root = Path(__file__).parent.parent
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sys.path.insert(0, str(project_root))
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from shared.config import settings
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from shared.database.models import Base
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# this is the Alembic Config object, which provides
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# access to the values within the .ini file in use.
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config = context.config
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# Interpret the config file for Python logging.
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# This line sets up loggers basically.
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if config.config_file_name is not None:
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fileConfig(config.config_file_name)
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# Set target metadata for autogenerate
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target_metadata = Base.metadata
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# Override sqlalchemy.url from settings if not set in alembic.ini
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if config.get_main_option("sqlalchemy.url") == "driver://user:pass@localhost/dbname":
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config.set_main_option("sqlalchemy.url", settings.DATABASE_URL)
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def run_migrations_offline() -> None:
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"""
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Run migrations in 'offline' mode.
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This configures the context with just a URL
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and not an Engine, though an Engine is acceptable
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here as well. By skipping the Engine creation
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we don't even need a DBAPI to be available.
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Calls to context.execute() here emit the given string to the
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script output.
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"""
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url = config.get_main_option("sqlalchemy.url")
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context.configure(
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url=url,
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target_metadata=target_metadata,
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literal_binds=True,
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dialect_opts={"paramstyle": "named"},
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)
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with context.begin_transaction():
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context.run_migrations()
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def do_run_migrations(connection: Connection) -> None:
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"""
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Run migrations with the given connection.
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"""
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context.configure(
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connection=connection,
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target_metadata=target_metadata,
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compare_type=False # Disable autogenerate comparison to use explicit migration definitions
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)
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with context.begin_transaction():
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context.run_migrations()
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async def run_async_migrations() -> None:
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"""
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Run migrations in 'online' mode with async engine.
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"""
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# Get database URL from settings
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database_url = settings.DATABASE_URL
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# Create async engine from config
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configuration = config.get_section(config.config_ini_section, {})
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configuration["sqlalchemy.url"] = database_url
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connectable = async_engine_from_config(
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configuration,
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prefix="sqlalchemy.",
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poolclass=pool.NullPool,
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)
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async with connectable.connect() as connection:
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await connection.run_sync(do_run_migrations)
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await connectable.dispose()
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def run_migrations_online() -> None:
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"""
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Run migrations in 'online' mode.
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For async SQLAlchemy, we use asyncio to run async migrations.
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"""
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import asyncio
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asyncio.run(run_async_migrations())
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if context.is_offline_mode():
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run_migrations_offline()
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else:
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run_migrations_online()
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