Todo App API

A simple Todo application API built with FastAPI and SQLite.

Features

• FastAPI web framework
• SQLite database with SQLAlchemy ORM
• Alembic database migrations
• CORS enabled for all origins
• Health check endpoint
• Interactive API documentation

Project Structure

todoapp-ns86xt/
├── main.py                 # FastAPI application entry point
├── requirements.txt        # Python dependencies
├── alembic.ini            # Alembic configuration
├── migrations/            # Database migration files
│   ├── env.py
│   ├── script.py.mako
│   └── versions/
├── app/                   # Application modules
│   ├── db/               # Database configuration
│   │   ├── base.py       # SQLAlchemy Base
│   │   └── session.py    # Database session management
│   ├── models/           # SQLAlchemy models
│   └── api/              # API endpoints
└── storage/              # Application storage directory
    └── db/               # SQLite database files

Installation

1. Install dependencies:

pip install -r requirements.txt

Running the Application

Start the development server:

uvicorn main:app --reload --host 0.0.0.0 --port 8000

The application will be available at:

• API: http://localhost:8000
• Interactive API docs (Swagger): http://localhost:8000/docs
• Alternative API docs (ReDoc): http://localhost:8000/redoc
• OpenAPI JSON: http://localhost:8000/openapi.json

API Endpoints

• GET / - Root endpoint with application information
• GET /health - Health check endpoint
• GET /docs - Interactive API documentation (Swagger UI)
• GET /redoc - Alternative API documentation (ReDoc)

Database

The application uses SQLite database stored at /app/storage/db/db.sqlite. Database migrations are managed with Alembic.

Database Migrations

To run database migrations:

# Upgrade to latest migration
alembic upgrade head

# Check current migration status
alembic current

# Create a new migration (after modifying models)
alembic revision --autogenerate -m "Description of changes"

# Downgrade by one migration
alembic downgrade -1

The initial migration creates the todos table with the following structure:

• id (Integer, Primary Key)
• title (String, Required)
• description (Text, Optional)
• completed (Boolean, Default: False)
• created_at (DateTime, Auto-generated)
• updated_at (DateTime, Auto-updated)

Environment Variables

Currently, no environment variables are required for basic operation.

Development

The project uses Ruff for code linting and formatting. Make sure to run linting before committing changes.

Health Check

The /health endpoint provides information about:

• Application status
• Database connectivity
• Service version