1 from __future__ import with_statement
2 from alembic import context
3 from sqlalchemy import engine_from_config, pool
4 from logging.config import fileConfig
5 from synnefo.settings import PITHOS_BACKEND_DB_CONNECTION
7 # this is the Alembic Config object, which provides
8 # access to the values within the .ini file in use.
9 config = context.config
11 # Interpret the config file for Python logging.
12 # This line sets up loggers basically.
13 fileConfig(config.config_file_name)
15 # add your model's MetaData object here
16 # for 'autogenerate' support
17 # from myapp import mymodel
18 # target_metadata = mymodel.Base.metadata
19 target_metadata = None
21 # other values from the config, defined by the needs of env.py,
23 # my_important_option = config.get_main_option("my_important_option")
26 db = config.get_main_option("sqlalchemy.url", PITHOS_BACKEND_DB_CONNECTION)
27 config.set_main_option("sqlalchemy.url", db)
29 def run_migrations_offline():
30 """Run migrations in 'offline' mode.
32 This configures the context with just a URL
33 and not an Engine, though an Engine is acceptable
34 here as well. By skipping the Engine creation
35 we don't even need a DBAPI to be available.
37 Calls to context.execute() here emit the given string to the
41 url = config.get_main_option("sqlalchemy.url")
42 context.configure(url=url)
44 with context.begin_transaction():
45 context.run_migrations()
47 def run_migrations_online():
48 """Run migrations in 'online' mode.
50 In this scenario we need to create an Engine
51 and associate a connection with the context.
54 engine = engine_from_config(
55 config.get_section(config.config_ini_section),
57 poolclass=pool.NullPool)
59 connection = engine.connect()
61 connection=connection,
62 target_metadata=target_metadata
66 with context.begin_transaction():
67 context.run_migrations()
71 if context.is_offline_mode():
72 run_migrations_offline()
74 run_migrations_online()