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from __future__ import with_statement
from alembic import context
from ConfigParser import ConfigParser
from os import path
from sqlalchemy import engine_from_config, pool
from logging.config import fileConfig
from bookie.models import Base
from bookie.models import initialize_sql
def load_bookie_ini(ini_file):
"""Load the settings for the bookie.ini file."""
ini = ConfigParser()
ini_path = path.join(path.dirname(path.dirname(__file__)), ini_file)
ini.readfp(open(ini_path))
here = path.abspath(path.join(path.dirname(__file__), '../'))
ini.set('app:main', 'here', here)
initialize_sql(dict(ini.items("app:main")))
return ini
# this is the Alembic Config object, which provides
# access to the values within the .ini file in use.
config = context.config
bookie_ini = config.get_main_option('app.ini', 'bookie.ini')
bookie_config = load_bookie_ini(bookie_ini)
sa_url = bookie_config.get('app:main', 'sqlalchemy.url')
config.set_main_option('sqlalchemy.url', sa_url)
# Interpret the config file for Python logging.
# This line sets up loggers basically.
fileConfig(config.config_file_name)
# 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()
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