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9d421771e7
- Preserve the SQLite database and use SQLAlchemy to wrap db interactions. - Use Alembic for database migrations. - Organize all the python modules on the new server/ directory. - Use pytest for unit tests and organize test modules at server/tests/.
87 lines
2.4 KiB
Python
87 lines
2.4 KiB
Python
import os
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import yaml
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from logging.config import fileConfig
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from sqlalchemy import engine_from_config
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from sqlalchemy import pool
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from alembic import context
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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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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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# from myapp import mymodel
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# target_metadata = mymodel.Base.metadata
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target_metadata = None
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# other values from the config, defined by the needs of env.py,
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# can be acquired:
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# my_important_option = config.get_main_option("my_important_option")
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# ... etc.
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db_yaml_path = os.path.join("config", 'database.yml')
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with open(db_yaml_path, 'r') as fd:
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db_conf = yaml.safe_load(fd)
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env = os.getenv('ENV', 'development')
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db_file = db_conf[env]['database']
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db_dir = os.path.dirname(db_file)
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if not os.path.isdir(db_dir):
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os.makedirs(db_dir)
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config.set_main_option('sqlalchemy.url', f'sqlite:///{db_file}')
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def run_migrations_offline():
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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 run_migrations_online():
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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 = 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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with connectable.connect() as connection:
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context.configure(connection=connection,
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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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