89 lines
2.6 KiB
Python
89 lines
2.6 KiB
Python
import os
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from dotenv import load_dotenv
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load_dotenv()
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from logging.config import fileConfig
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from sqlalchemy import pool, create_engine
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from alembic import context
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from core.models import Base
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# Migrations run as the schema owner (wikitcg), which is a different role from the
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# one the app runs as (wikitcg_app, DML only). Deliberately no fallback to
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# DATABASE_URL: falling back would connect as the app role and fail somewhere deep
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# inside a CREATE/ALTER with a permissions error, instead of telling you plainly
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# that the environment is misconfigured.
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MIGRATION_DATABASE_URL = os.environ.get("MIGRATION_DATABASE_URL")
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if not MIGRATION_DATABASE_URL:
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raise RuntimeError(
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"MIGRATION_DATABASE_URL is not set. Migrations must run as the schema owner "
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"(wikitcg), not as the application role (wikitcg_app), which has no DDL "
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"rights. In Docker: docker compose run --rm backend alembic upgrade head"
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)
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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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# Note: the URL is passed straight to create_engine / context.configure rather than
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# through config.set_main_option. alembic.ini is a configparser file, so a password
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# containing '%' would be mangled by interpolation on the way through.
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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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# add your model's MetaData object here
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# for 'autogenerate' support
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target_metadata = Base.metadata
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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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context.configure(
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url=MIGRATION_DATABASE_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 in 'online' mode.
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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 = create_engine(MIGRATION_DATABASE_URL, poolclass=pool.NullPool)
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with connectable.connect() as connection:
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context.configure(
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connection=connection, target_metadata=target_metadata
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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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