1  from logging.config import fileConfig
 2  
 3  from sqlalchemy import engine_from_config
 4  from sqlalchemy import pool
 5  
 6  from alembic import context
 7  
 8  # this is the Alembic Config object, which provides
 9  # access to the values within the .ini file in use.
10  config = context.config
11  
12  # Interpret the config file for Python logging.
13  # This line sets up loggers basically.
14  if config.config_file_name is not None:
15      fileConfig(config.config_file_name)
16  
17  # add your model's MetaData object here
18  # for 'autogenerate' support
19  from restai.models.databasemodels import Base
20  target_metadata = Base.metadata
21  
22  # other values from the config, defined by the needs of env.py,
23  # can be acquired:
24  # my_important_option = config.get_main_option("my_important_option")
25  # ... etc.
26  
27  
28  def run_migrations_offline() -> None:
29      """Run migrations in 'offline' mode.
30  
31      This configures the context with just a URL
32      and not an Engine, though an Engine is acceptable
33      here as well.  By skipping the Engine creation
34      we don't even need a DBAPI to be available.
35  
36      Calls to context.execute() here emit the given string to the
37      script output.
38  
39      """
40      url = config.get_main_option("sqlalchemy.url")
41      context.configure(
42          url=url,
43          target_metadata=target_metadata,
44          literal_binds=True,
45          dialect_opts={"paramstyle": "named"},
46      )
47  
48      with context.begin_transaction():
49          context.run_migrations()
50  
51  
52  def run_migrations_online() -> None:
53      """Run migrations in 'online' mode.
54  
55      In this scenario we need to create an Engine
56      and associate a connection with the context.
57  
58      """
59      connectable = engine_from_config(
60          config.get_section(config.config_ini_section, {}),
61          prefix="sqlalchemy.",
62          poolclass=pool.NullPool,
63      )
64  
65      with connectable.connect() as connection:
66          context.configure(
67              connection=connection, target_metadata=target_metadata
68          )
69  
70          with context.begin_transaction():
71              context.run_migrations()
72  
73  
74  if context.is_offline_mode():
75      run_migrations_offline()
76  else:
77      run_migrations_online()