9d0d29ef18
Database Infrastructure: - Added Alembic migration system (alembic.ini, env.py) - Migration 001: Initial schema - Migration 004: Stat materialized views (enhanced) - Migration 005: Composite indexes for performance - operations.py: Session injection support for test isolation - session.py: Enhanced session management Application Updates: - main.py: Integration with new database infrastructure - health.py: Enhanced health checks with pool monitoring Integration Tests: - conftest.py: Session injection pattern for reliable tests - test_operations.py: Database operations tests - test_migrations.py: Migration verification tests Session injection pattern enables: - Production: Auto-commit per operation - Testing: Shared session with automatic rollback - Transactions: Multiple ops, single commit 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>
59 lines
1.5 KiB
Python
59 lines
1.5 KiB
Python
import logging
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from collections.abc import AsyncGenerator
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import sqlalchemy as sa
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from sqlalchemy.ext.asyncio import AsyncSession, async_sessionmaker, create_async_engine
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from sqlalchemy.orm import declarative_base
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from app.config import get_settings
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logger = logging.getLogger(f"{__name__}.session")
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settings = get_settings()
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# Create async engine
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engine = create_async_engine(
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settings.database_url,
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echo=settings.debug,
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pool_size=settings.db_pool_size,
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max_overflow=settings.db_max_overflow,
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)
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# Create session factory
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AsyncSessionLocal = async_sessionmaker(
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engine,
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class_=AsyncSession,
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expire_on_commit=False,
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autocommit=False,
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autoflush=False,
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)
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# Base class for models
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Base = declarative_base()
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async def init_db() -> None:
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"""Initialize database connection.
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NOTE: Schema creation is now handled by Alembic migrations.
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Run `alembic upgrade head` to create/update schema.
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See backend/README.md for migration instructions.
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"""
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# Verify database connectivity
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async with engine.begin() as conn:
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await conn.execute(sa.text("SELECT 1"))
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logger.info("Database connection initialized")
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async def get_session() -> AsyncGenerator[AsyncSession]:
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"""Dependency for getting database session"""
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async with AsyncSessionLocal() as session:
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try:
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yield session
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await session.commit()
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except Exception:
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await session.rollback()
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raise
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finally:
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await session.close()
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