Initial commit

backend/app/db/base.py

@@ -0,0 +1,8 @@
+"""Base model class for all database models."""
+
+from sqlalchemy.ext.declarative import declarative_base
+
+# Base class for all SQLAlchemy models
+Base = declarative_base()
+
+# Note: Model imports have been moved to alembic/env.py to avoid circular imports

backend/app/db/session.py

@@ -0,0 +1,26 @@
+"""Database session management."""
+
+from sqlalchemy import create_engine
+from sqlalchemy.orm import sessionmaker
+from app.config import settings
+
+
+# SQLite specific connection arguments
+connect_args = {}
+if settings.DATABASE_URL.startswith("sqlite"):
+    connect_args = {"check_same_thread": False}
+
+# Create database engine
+engine = create_engine(
+    settings.DATABASE_URL,
+    connect_args=connect_args,
+    pool_pre_ping=True,  # Verify connections before using
+    echo=settings.DEBUG,  # Log SQL queries in debug mode
+)
+
+# Create session factory
+SessionLocal = sessionmaker(
+    autocommit=False,
+    autoflush=False,
+    bind=engine
+)