"""Alembic environment configuration."""
import sys
from logging.config import fileConfig
from pathlib import Path
from alembic import context
from sqlalchemy import engine_from_config, pool
# Add project root to path
sys.path.insert(0, str(Path(__file__).parents[3]))
from src.config import get_database_url
from src.database.models import Base
# 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.
if config.config_file_name is not None:
fileConfig(config.config_file_name)
# add your model's MetaData object here
# for 'autogenerate' support
target_metadata = Base.metadata
def get_url() -> str:
"""Get database URL from settings."""
# get_database_url imported globally from src.config
return get_database_url()
def run_migrations_offline() -> None:
"""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 = get_url()
context.configure(
url=url,
target_metadata=target_metadata,
literal_binds=True,
dialect_opts={"paramstyle": "named"},
)
with context.begin_transaction():
context.run_migrations()
def run_migrations_online() -> None:
"""Run migrations in 'online' mode.
In this scenario we need to create an Engine
and associate a connection with the context.
"""
section = config.get_section(config.config_ini_section)
configuration: dict[str, str] = dict(section) if section is not None else {}
configuration["sqlalchemy.url"] = get_url()
connectable = engine_from_config(
configuration,
prefix="sqlalchemy.",
poolclass=pool.NullPool,
)
with connectable.connect() as connection:
context.configure(
connection=connection,
target_metadata=target_metadata,
compare_type=True,
compare_server_default=True,
)
with context.begin_transaction():
# Create custom SQL for pgvector extension and indexes
if context.is_offline_mode():
context.execute("CREATE EXTENSION IF NOT EXISTS vector")
else:
connection.exec_driver_sql("CREATE EXTENSION IF NOT EXISTS vector")
context.run_migrations()
if context.is_offline_mode():
run_migrations_offline()
else:
run_migrations_online()