📌 This repository is a collection of small, educational FastAPI + SQLAlchemy projects built for learning and experimentation.
Each project focuses on one or more essential backend development concepts — from basic CRUD endpoints to database relationships, validation, and testing.
All projects are self-contained in their own folders and can be run independently.

• Bookmarks API – simple CRUD service for managing bookmarks with tags, notes, and a favorite flag.
• Todo API – task manager using SQLite + SQLAlchemy with search, filtering, and pagination.
• Expense API – expense tracking service with categories, currency validation, and date-based filtering.
• Library API – a library management system with authors, genres, and books (one-to-many and many-to-many relations, validation, and test coverage).
• (More coming soon…)

• FastAPI fundamentals: routes, path/query/body parameters
• Data validation with Pydantic (Field, validators, regex patterns)
• CRUD architecture and REST conventions
• Pagination, filtering, and query parameters
• SQLAlchemy ORM + SQLite (relationships, foreign keys, cascading)
• Automated testing with pytest and TestClient
• Error handling and HTTP status codes (404, 409, 422)
• Auto-generated API documentation via Swagger UI (/docs) and ReDoc (/redoc)

cd <project-folder>
python -m venv venv
venv\Scripts\activate       # Windows
# or
source venv/bin/activate    # macOS / Linux
pip install -r requirements.txt
uvicorn app.main:app --reload