Ali Zarinkolah
80ed5b1577
alembic/env.py previously always overwrote sqlalchemy.url from Settings().postgres.dsn, which made it impossible for a test fixture to point Alembic at a Testcontainers-managed database. Now env.py only sets it when unset, and a new integration suite runs `alembic upgrade head` against a real Postgres container per ADR-0016 (no create_all()).
90 lines
2.6 KiB
Python
90 lines
2.6 KiB
Python
import asyncio
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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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from src.config import Settings
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from src.infrastructure.postgres.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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# Application models' MetaData, used for 'autogenerate' support. The database
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# URL is likewise sourced from application settings by default, so both
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# migrations and the app read the same env-derived configuration (ADR-0009) —
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# unless a caller (e.g. a test fixture pointing at a Testcontainers database)
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# has already set sqlalchemy.url on this Config before invoking Alembic.
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target_metadata = Base.metadata
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if not config.get_main_option("sqlalchemy.url"):
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config.set_main_option("sqlalchemy.url", Settings().postgres.dsn)
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def run_migrations_offline() -> None:
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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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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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async def run_async_migrations() -> None:
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"""In this scenario we need to create an Engine
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and associate a connection with the context.
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"""
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connectable = async_engine_from_config(
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config.get_section(config.config_ini_section, {}),
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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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"""Run migrations in 'online' mode."""
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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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