74 lines
2.1 KiB
Python
74 lines
2.1 KiB
Python
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"""Alembic environment configuration.
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The migration runner is sync; the runtime service is async. To support a
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single configured ``ARTIFACTSTORE_DATABASE_URL``, this module rewrites
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async driver URLs (``+aiosqlite``, ``+asyncpg``) to their sync counterparts
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when invoking Alembic.
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"""
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from __future__ import annotations
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import sys
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from logging.config import fileConfig
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from pathlib import Path
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from alembic import context
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from sqlalchemy import engine_from_config, pool
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_ROOT = Path(__file__).resolve().parent.parent
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_SRC = _ROOT / "src"
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if str(_SRC) not in sys.path:
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sys.path.insert(0, str(_SRC))
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from artifactstore.config import get_settings # noqa: E402
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from artifactstore.db.schema import metadata as target_metadata # noqa: E402
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config = context.config
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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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def _sync_url(url: str) -> str:
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"""Translate an async driver URL to its sync counterpart for Alembic."""
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if "+aiosqlite" in url:
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return url.replace("+aiosqlite", "")
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if "+asyncpg" in url:
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return url.replace("+asyncpg", "+psycopg")
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return url
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_settings = get_settings()
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config.set_main_option("sqlalchemy.url", _sync_url(_settings.database_url))
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def run_migrations_offline() -> None:
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"""Emit SQL without a live DB connection."""
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context.configure(
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url=config.get_main_option("sqlalchemy.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 run_migrations_online() -> None:
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"""Run migrations against a live DB connection."""
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section = config.get_section(config.config_ini_section) or {}
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connectable = engine_from_config(
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section,
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prefix="sqlalchemy.",
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poolclass=pool.NullPool,
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)
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with connectable.connect() as connection:
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context.configure(connection=connection, target_metadata=target_metadata)
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with context.begin_transaction():
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context.run_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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