~sirn/fanboi2

ref: 98796226802a26b82c888365ad5b9cd331006792 fanboi2/migration/env.py -rw-r--r-- 2.2 KiB
98796226Kridsada Thanabulpong Bump copyright year. 3 years ago
                                                                                
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from alembic import context
from sqlalchemy import engine_from_config, pool
from logging.config import fileConfig
from pyramid.paster import get_appsettings
from fanboi2.models import Base


def get_pyramid_sa_url(config):
    pyramid_config = config.get_main_option('pyramid_configuration')
    return get_appsettings(pyramid_config)['sqlalchemy.url']

# this is the Alembic Config object, which provides
# access to the values within the .ini file in use.
config = context.config
pyramid_config = config.get_main_option('pyramid_configuration')
config.set_main_option('sqlalchemy.url', get_pyramid_sa_url(config))

# Interpret the config file for Python logging.
# This line sets up loggers basically.
fileConfig(pyramid_config)

# add your model's MetaData object here
# for 'autogenerate' support
# from myapp import mymodel
# target_metadata = mymodel.Base.metadata
target_metadata = Base.metadata

# 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.


def run_migrations_offline():
    """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)

    with context.begin_transaction():
        context.run_migrations()


def run_migrations_online():
    """Run migrations in 'online' mode.

    In this scenario we need to create an Engine
    and associate a connection with the context.

    """
    engine = engine_from_config(
        config.get_section(config.config_ini_section),
        prefix='sqlalchemy.',
        poolclass=pool.NullPool)

    connection = engine.connect()
    context.configure(connection=connection, target_metadata=target_metadata)

    try:
        with context.begin_transaction():
            context.run_migrations()
    finally:
        connection.close()

if context.is_offline_mode():
    run_migrations_offline()
else:
    run_migrations_online()