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src/backend/core/database.py

@@ -0,0 +1,49 @@
+from sqlalchemy.ext.asyncio import create_async_engine, AsyncSession, async_sessionmaker
+from sqlalchemy.orm import DeclarativeBase
+from sqlalchemy import text
+import structlog
+
+from .config import settings
+
+logger = structlog.get_logger()
+
+class Base(DeclarativeBase):
+    pass
+
+engine = create_async_engine(
+    settings.database_url,
+    echo=settings.debug,
+    pool_pre_ping=True,
+    pool_recycle=300
+)
+
+AsyncSessionLocal = async_sessionmaker(
+    engine,
+    class_=AsyncSession,
+    expire_on_commit=False
+)
+
+async def get_db():
+    async with AsyncSessionLocal() as session:
+        try:
+            yield session
+        except Exception:
+            await session.rollback()
+            raise
+        finally:
+            await session.close()
+
+async def init_db():
+    try:
+        async with engine.begin() as conn:
+            await conn.execute(text("CREATE EXTENSION IF NOT EXISTS vector"))
+            logger.info("Database extensions initialized")
+            
+        from ..models import user, application, job, document
+        async with engine.begin() as conn:
+            await conn.run_sync(Base.metadata.create_all)
+            logger.info("Database tables created")
+            
+    except Exception as e:
+        logger.error("Database initialization failed", error=str(e))
+        raise