60d9228d91
- Add database.py with SQLAlchemy engine and session - Implement get_db() for FastAPI dependency injection - Implement init_db() for table creation - Use SQLAlchemy 2.0 declarative_base() syntax - Add comprehensive tests with 100% coverage Tests: 11 passed, 100% coverage
68 lines
1.8 KiB
Python
68 lines
1.8 KiB
Python
"""Database connection and session management.
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T06: Database connection & session management
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"""
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from sqlalchemy import create_engine
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from sqlalchemy.orm import sessionmaker, Session, declarative_base
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from typing import Generator
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from openrouter_monitor.config import get_settings
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# Create declarative base for models (SQLAlchemy 2.0 style)
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Base = declarative_base()
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# Get settings
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settings = get_settings()
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# Create engine with SQLite configuration
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# check_same_thread=False is required for SQLite with async/threads
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engine = create_engine(
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settings.database_url,
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connect_args={"check_same_thread": False}
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)
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# Create session maker with expire_on_commit=False
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# This prevents attributes from being expired after commit
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SessionLocal = sessionmaker(
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autocommit=False,
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autoflush=False,
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bind=engine,
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expire_on_commit=False
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)
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def get_db() -> Generator[Session, None, None]:
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"""Get database session for FastAPI dependency injection.
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This function creates a new database session and yields it.
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The session is automatically closed when the request is done.
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Yields:
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Session: SQLAlchemy database session
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Example:
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>>> from fastapi import Depends
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>>> @app.get("/items/")
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>>> def read_items(db: Session = Depends(get_db)):
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... return db.query(Item).all()
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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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def init_db() -> None:
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"""Initialize database by creating all tables.
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This function creates all tables registered with Base.metadata.
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Should be called at application startup.
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Example:
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>>> from openrouter_monitor.database import init_db
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>>> init_db() # Creates all tables
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"""
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Base.metadata.create_all(bind=engine)
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