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artemis/core/data/alembic/env.py

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from __future__ import with_statement
from alembic import context
from sqlalchemy import engine_from_config, pool
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from logging.config import fileConfig
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from core.data.schema.base import metadata
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# 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)
# add your model's MetaData object here
# for 'autogenerate' support
# from myapp import mymodel
# target_metadata = mymodel.Base.metadata
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target_metadata = metadata
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# 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.
"""
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raise Exception('Not implemented or configured!')
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url = config.get_main_option("sqlalchemy.url")
context.configure(
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url=url, target_metadata=target_metadata, literal_binds=True)
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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.
"""
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ini_section = config.get_section(config.config_ini_section)
overrides = context.get_x_argument(as_dictionary=True)
for override in overrides:
ini_section[override] = overrides[override]
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connectable = engine_from_config(
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ini_section,
prefix='sqlalchemy.',
poolclass=pool.NullPool)
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with connectable.connect() as connection:
context.configure(
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connection=connection,
target_metadata=target_metadata,
compare_type=True,
compare_server_default=True,
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)
with context.begin_transaction():
context.run_migrations()
if context.is_offline_mode():
run_migrations_offline()
else:
run_migrations_online()