这种结构分离了关注点，使得随着项目规模的扩大而更容易管理。
stock-system/│├── app/│ ├── __init__.py│ ├── main.py # Entry point of the FastAPI app│ ├── api/# API related code (routers)│ │ ├── __init__.py│ │ ├── products.py # Routes related to products│ │ ├── inventory.py # Routes related to inventory management│ │ ├── sales.py # Routes related to sales and orders│ │ └── users.py # Routes related to user management│ ││ ├── core/ # Core settings and configurations│ │ ├── __init__.py│ │ ├── config.py # Configuration settings (DB, API keys, etc.)│ │ └── security.py # Authentication, Authorization, and Security utilities│ ││ ├── crud/ # CRUD operations for database interactions│ │ ├── __init__.py│ │ ├── crud_product.py # CRUD operations related to products│ │ ├── crud_inventory.py # CRUD operations related to inventory│ │ ├── crud_sales.py# CRUD operations related to sales│ │ └── crud_user.py # CRUD operations related to users│ ││ ├── db/ # Database-related modules│ │ ├── __init__.py│ │ ├── base.py# SQLAlchemy base for models│ │ ├── session.py # Database session creation│ │ └── models/# SQLAlchemy models│ │ ├── __init__.py│ │ ├── product.py # Product model│ │ ├── inventory.py # Inventory model│ │ ├── sales.py # Sales/Orders model│ │ └── user.py # User model│ ││ ├── schemas/ # Pydantic schemas for request/response models│ │ ├── __init__.py│ │ ├── product.py # Product-related schemas│ │ ├── inventory.py # Inventory-related schemas│ │ ├── sales.py # Sales-related schemas│ │ └── user.py# User-related schemas│ ││ ├── services/ # Additional business logic/services│ │ ├── __init__.py│ │ ├── product_service.py # Logic related to products│ │ ├── inventory_service.py # Logic related to inventory│ │ ├── sales_service.py # Logic related to sales│ │ └── user_service.py # Logic related to users│ ││ └── utils/ # Utility functions/helpers│ ├── __init__.py│ ├── dependencies.py # Common dependencies for routes│ └── helpers.py # Miscellaneous helper functions│├── tests/ # Test cases│ ├── __init__.py│ ├── test_products.py # Tests related to products│ ├── test_inventory.py# Tests related to inventory│ ├── test_sales.py # Tests related to sales/orders│ └── test_users.py # Tests related to users│├── alembic/# Database migrations using Alembic (if needed)│ ├── versions/ # Directory for migration scripts│ └── env.py # Alembic environment configuration│├── Dockerfile # Dockerfile for containerizing the application├── .env # Environment variables file (for secrets and config)├── .gitignore # Files and directories to ignore in git├── pyproject.toml # Dependencies and project metadata (or requirements.txt)├── README.md # Documentation of the project└── uvicorn_config.py # Configuration for running the FastAPI app with Uvicorn
关键目录和文件：app/main.py：fastapi 应用程序的入口点。它启动应用程序，包括路由器和其他配置。api/：包含库存系统各个方面（产品、库存、销售、用户）的路由定义。db/：包括 sqlalchemy 模型、数据库会话设置和相关文件。crud/：通过crud操作处理数据库和api之间的交互。schemas/：定义用于验证和序列化请求和响应数据的 pydantic 模型。services/：包含系统各种功能的业务逻辑。tests/：包含单元测试和集成测试以确保功能。alembic/：如果您使用 alembic 进行数据库迁移，这就是迁移文件所在的位置。
这种结构对于库存系统来说是灵活且可扩展的，促进关注点分离，更容易测试和维护。
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