AR 15 M4
75048bb88e
Первый кусок Спринта 2: подключаем SQLite через SQLAlchemy 2.0 (async, ORM-стиль) и Alembic для миграций. Схема выбрана под будущий рост — в threads сразу заведены nullable user_id и agent_config_id, чтобы Спринты 3+ не тащили миграции задним числом. - requirements.txt: sqlalchemy[asyncio]==2.0.36, aiosqlite==0.20.0, alembic==1.14.0. - config: database_url + sqlite_path (./data/sqlite/app.db). - db/base.py: DeclarativeBase; db/session.py: async engine, async_sessionmaker, get_session — FastAPI-dependency. - db/models/Thread: id, name, user_id?, agent_config_id?, created_at, updated_at; relationship messages с cascade all, delete-orphan. - db/models/Message: id, thread_id FK CASCADE, role, text, sources_json, assembled_prompt, created_at. - Alembic инициализирован через async-шаблон, env.py доработан: sys.path, url из settings, target_metadata = Base.metadata. - Начальная миграция e7199587be4b применена, таблицы threads/messages с индексами на FK и nullable-колонки созданы в data/sqlite/app.db. - .gitignore: исключаем data/sqlite/ (БД — артефакт, не исходник). Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
91 lines
2.4 KiB
Python
91 lines
2.4 KiB
Python
import asyncio
|
|
import os
|
|
import sys
|
|
from logging.config import fileConfig
|
|
|
|
from sqlalchemy import pool
|
|
from sqlalchemy.engine import Connection
|
|
from sqlalchemy.ext.asyncio import async_engine_from_config
|
|
|
|
from alembic import context
|
|
|
|
sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
|
|
|
|
from config import settings # noqa: E402
|
|
from db.base import Base # noqa: E402
|
|
from db import models # noqa: F401, E402 — регистрация моделей в Base.metadata
|
|
|
|
config = context.config
|
|
config.set_main_option("sqlalchemy.url", settings.database_url)
|
|
|
|
if config.config_file_name is not None:
|
|
fileConfig(config.config_file_name)
|
|
|
|
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() -> 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 = config.get_main_option("sqlalchemy.url")
|
|
context.configure(
|
|
url=url,
|
|
target_metadata=target_metadata,
|
|
literal_binds=True,
|
|
dialect_opts={"paramstyle": "named"},
|
|
)
|
|
|
|
with context.begin_transaction():
|
|
context.run_migrations()
|
|
|
|
|
|
def do_run_migrations(connection: Connection) -> None:
|
|
context.configure(connection=connection, target_metadata=target_metadata)
|
|
|
|
with context.begin_transaction():
|
|
context.run_migrations()
|
|
|
|
|
|
async def run_async_migrations() -> None:
|
|
"""In this scenario we need to create an Engine
|
|
and associate a connection with the context.
|
|
|
|
"""
|
|
|
|
connectable = async_engine_from_config(
|
|
config.get_section(config.config_ini_section, {}),
|
|
prefix="sqlalchemy.",
|
|
poolclass=pool.NullPool,
|
|
)
|
|
|
|
async with connectable.connect() as connection:
|
|
await connection.run_sync(do_run_migrations)
|
|
|
|
await connectable.dispose()
|
|
|
|
|
|
def run_migrations_online() -> None:
|
|
"""Run migrations in 'online' mode."""
|
|
|
|
asyncio.run(run_async_migrations())
|
|
|
|
|
|
if context.is_offline_mode():
|
|
run_migrations_offline()
|
|
else:
|
|
run_migrations_online()
|