86 lines
2.3 KiB
Python
86 lines
2.3 KiB
Python
"""Alembic environment configuration for backend database migrations."""
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from __future__ import annotations
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import importlib
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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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from sqlmodel import SQLModel
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PROJECT_ROOT = Path(__file__).resolve().parents[1]
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if str(PROJECT_ROOT) not in sys.path:
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sys.path.append(str(PROJECT_ROOT))
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importlib.import_module("app.models")
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settings = importlib.import_module("app.core.config").settings
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config = context.config
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configure_logger = config.attributes.get("configure_logger", True)
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if config.config_file_name is not None and configure_logger:
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fileConfig(config.config_file_name)
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target_metadata = SQLModel.metadata
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def _normalize_database_url(database_url: str) -> str:
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if "://" not in database_url:
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return database_url
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scheme, rest = database_url.split("://", 1)
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if scheme in ("postgresql", "postgres"):
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return f"postgresql+psycopg://{rest}"
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return database_url
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def get_url() -> str:
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"""Return the normalized SQLAlchemy database URL for Alembic."""
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return _normalize_database_url(settings.database_url)
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config.set_main_option("sqlalchemy.url", get_url())
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def run_migrations_offline() -> None:
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"""Run migrations in offline mode without DB engine connectivity."""
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context.configure(
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url=get_url(),
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target_metadata=target_metadata,
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literal_binds=True,
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compare_type=True,
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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 in online mode using a live DB connection."""
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configuration = config.get_section(config.config_ini_section) or {}
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configuration["sqlalchemy.url"] = get_url()
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connectable = 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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with connectable.connect() as connection:
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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=True,
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)
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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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