51 lines
1.8 KiB
Python
51 lines
1.8 KiB
Python
from sqlalchemy.ext.asyncio import AsyncEngine, AsyncSession, async_sessionmaker, create_async_engine
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from sqlalchemy import create_engine, Engine, event
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from sqlmodel import SQLModel
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from typing import AsyncGenerator
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# We need both sync and async engines for SQLite
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# Sync for initialization (DDL) and async for standard queries
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def get_async_engine(db_path: str) -> AsyncEngine:
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# If it's a memory URI, don't add the extra slash that turns it into a relative file
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prefix = "sqlite+aiosqlite:///"
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if db_path.startswith(":memory:"):
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prefix = "sqlite+aiosqlite://"
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engine = create_async_engine(
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f"{prefix}{db_path}",
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echo=False,
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connect_args={"uri": True, "timeout": 30},
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)
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@event.listens_for(engine.sync_engine, "connect")
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def _set_sqlite_pragmas(dbapi_conn, _conn_record):
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cursor = dbapi_conn.cursor()
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cursor.execute("PRAGMA journal_mode=WAL")
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cursor.execute("PRAGMA synchronous=NORMAL")
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cursor.execute("PRAGMA busy_timeout=30000")
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cursor.close()
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return engine
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def get_sync_engine(db_path: str) -> Engine:
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prefix = "sqlite:///"
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if db_path.startswith(":memory:"):
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prefix = "sqlite://"
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return create_engine(f"{prefix}{db_path}", echo=False, connect_args={"uri": True})
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def init_db(db_path: str) -> None:
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"""Synchronously create all tables."""
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engine = get_sync_engine(db_path)
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# Ensure WAL mode is set
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with engine.connect() as conn:
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conn.exec_driver_sql("PRAGMA journal_mode=WAL")
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conn.exec_driver_sql("PRAGMA synchronous=NORMAL")
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SQLModel.metadata.create_all(engine)
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async def get_session(engine: AsyncEngine) -> AsyncGenerator[AsyncSession, None]:
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async_session = async_sessionmaker(
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engine, class_=AsyncSession, expire_on_commit=False
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)
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async with async_session() as session:
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yield session
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