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AI Assistant

Hello! I'm your AI development assistant. How can I help you with your project today?

I can help with:

Code generation and refactoring
Debugging assistance
Project documentation
Architecture diagrams
Environment setup

You

Can you help me set up a Python project with FastAPI and PostgreSQL?

AI Assistant

Certainly! Here's how to set up a FastAPI project with PostgreSQL:

# First, create a virtual environment
python -m venv fastapi_env
source fastapi_env/bin/activate  # On Windows use `fastapi_env\Scripts\activate`

# Install required packages
pip install fastapi uvicorn sqlalchemy psycopg2-binary python-dotenv

# Create a basic FastAPI app with PostgreSQL connection
# main.py
from fastapi import FastAPI
from sqlalchemy import create_engine
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy.orm import sessionmaker

app = FastAPI()

# Database setup
DATABASE_URL = "postgresql://user:password@localhost:5432/mydatabase"
engine = create_engine(DATABASE_URL)
SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)
Base = declarative_base()

Would you like me to:

Create the project structure for you?
Explain any part in more detail?
Generate a requirements.txt file?

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Project Requirements Document

1. Project Overview

This project will create a FastAPI backend service with PostgreSQL database integration. The service will provide RESTful API endpoints for a future frontend application.

2. Features

User authentication (JWT)
CRUD operations for core entities
Database migrations
API documentation (Swagger/OpenAPI)
Docker configuration

3. Technical Stack

Component	Technology
Backend Framework	FastAPI
Database	PostgreSQL
ORM	SQLAlchemy
Authentication	JWT

4. API Endpoints

GET    /api/users         - List all users
POST   /api/users         - Create new user
GET    /api/users/{id}    - Get user details
PUT    /api/users/{id}    - Update user
DELETE /api/users/{id}    - Delete user

Project Files

fastapi_env

main.py

requirements.txt

README.md

PROTOTYPE_LOG.md

WORKFLOW_SUMMARY.md

models.py

schemas.py

crud.py

database.py

Terminal

$ python -m venv fastapi_env

$ source fastapi_env/bin/activate

(fastapi_env) $ pip install fastapi uvicorn sqlalchemy psycopg2-binary

Collecting fastapi

Downloading fastapi-0.95.2-py3-none-any.whl (56 kB)

━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 56.5/56.5 kB 1.2 MB/s eta 0:00:00

...

Successfully installed fastapi-0.95.2 sqlalchemy-2.0.15 uvicorn-0.22.0

(fastapi_env) $ uvicorn main:app --reload

INFO: Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)

INFO: Started reloader process [12345] using WatchFiles

INFO: Started server process [12347]

INFO: Waiting for application startup.

INFO: Application startup complete.

(fastapi_env) $ █

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