68 lines
1.3 KiB
Python
68 lines
1.3 KiB
Python
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"""
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Database connection setup using SQLAlchemy.
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"""
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from sqlalchemy import create_engine
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from sqlalchemy.orm import sessionmaker, declarative_base
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from contextlib import contextmanager
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from .config import settings
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# Create engine
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engine = create_engine(
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settings.database_url,
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pool_size=10,
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max_overflow=20,
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pool_pre_ping=True, # Verify connections before use
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echo=False, # Set to True for SQL debugging
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)
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# Session factory
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SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)
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# Base class for models
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Base = declarative_base()
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def get_db():
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"""
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Dependency for FastAPI routes to get a database session.
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"""
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db = SessionLocal()
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try:
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yield db
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finally:
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db.close()
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@contextmanager
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def get_db_session():
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"""
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Context manager for database sessions.
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Use in non-FastAPI contexts (scripts, etc).
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"""
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db = SessionLocal()
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try:
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yield db
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db.commit()
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except Exception:
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db.rollback()
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raise
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finally:
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db.close()
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def init_db():
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"""
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Initialize database - create all tables.
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"""
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Base.metadata.create_all(bind=engine)
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def drop_db():
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"""
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Drop all tables - use with caution!
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"""
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Base.metadata.drop_all(bind=engine)
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