from __future__ import with_statement import os from alembic import context from sqlalchemy import engine_from_config, pool from logging.config import fileConfig # this is the Alembic Config object, which provides # access to the values within the .ini file in use. config = context.config # Interpret the config file for Python logging. # This line sets up loggers basically. fileConfig(config.config_file_name) # other values from the config, defined by the needs of env.py, # can be acquired: # my_important_option = config.get_main_option("my_important_option") # ... etc. from piket_server.flask import CONFIG_DIR, DB_URL, db # add your model's MetaData object here # for 'autogenerate' support # from myapp import mymodel # target_metadata = mymodel.Base.metadata target_metadata = db.Model.metadata os.makedirs(os.path.expanduser(CONFIG_DIR), mode=0o744, exist_ok=True) config.file_config["alembic"]["sqlalchemy.url"] = DB_URL def run_migrations_offline() -> None: """Run migrations in 'offline' mode. This configures the context with just a URL and not an Engine, though an Engine is acceptable here as well. By skipping the Engine creation we don't even need a DBAPI to be available. Calls to context.execute() here emit the given string to the script output. """ url = config.get_main_option("sqlalchemy.url") context.configure(url=url, target_metadata=target_metadata, literal_binds=True) with context.begin_transaction(): context.run_migrations() def run_migrations_online() -> None: """Run migrations in 'online' mode. In this scenario we need to create an Engine and associate a connection with the context. """ connectable = engine_from_config( config.get_section(config.config_ini_section), prefix="sqlalchemy.", poolclass=pool.NullPool, ) with connectable.connect() as connection: context.configure(connection=connection, target_metadata=target_metadata) with context.begin_transaction(): context.run_migrations() if context.is_offline_mode(): run_migrations_offline() else: run_migrations_online()