🚀 FastAPI – SQLAlchemy Revision

A complete revision-focused backend project built using FastAPI and SQLAlchemy, demonstrating a clean, modular, and scalable REST API architecture.

This repository is intended to practice and showcase industry-level backend structure, proper separation of concerns, and RESTful API development using Python.

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📌 Project Description

This project implements a User-based REST API with a well-structured backend architecture.
The application is organized into separate modules for database handling, models, schemas, services, routers, and configuration.

⚠️ This project does not include authentication.
The main focus is on application structure, database integration, and clean code practices.

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🧠 Concepts & Learnings

• FastAPI application structure
• Modular backend architecture
• SQLAlchemy ORM usage
• SQLite database integration
• Pydantic models for data validation
• API Routers for clean endpoint separation
• Service layer for business logic
• RESTful API design principles

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🗂️ Folder Structure

app/
│
├── database/
│ └── database.py # Database connection & session management
│
├── models/
│ └── user.py # SQLAlchemy ORM models
│
├── schemas/
│ └── user.py # Pydantic request/response schemas
│
├── services/
│ └── user_service.py # Business logic layer
│
├── routers/
│ └── user.py # User API routes
│
├── config/
│ └── config.py # Application configuration
│
├── main.py # FastAPI application entry point

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🛠️ Tech Stack

• Python
• FastAPI
• SQLAlchemy
• SQLite
• Pydantic
• Uvicorn
• API Routers

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🔁 API Functionality

This REST API supports standard CRUD operations for users:

• Create user
• Fetch user details
• Update user information
• Delete user
• Input & output validation using Pydantic
• Clean separation between routes, services, and database logic

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▶️ Running the Project Locally

1️⃣ Clone the Repository

git clone https://github.com/Nevin100/FastAPI-SQLAlchemy-Revision.git
cd FastAPI-SQLAlchemy-Revision

2️⃣ Create & Activate Virtual Environment

python -m venv venv
source venv/bin/activate     # Windows: venv\Scripts\activate

3️⃣ Install Dependencies

pip install fastapi uvicorn sqlalchemy pydantic

4️⃣ Start the Development Server

uvicorn app.main:app --reload

Open API Docs

Swagger UI:

http://127.0.0.1:8000/docs

ReDoc:

http://127.0.0.1:8000/redoc