⚡ Live Sandbox: AI Dev Tool: Rust WebAssembly Edge (ag0y)

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```python
# AI Dev Tool: FastAPI Pydantic v2 Micro-SaaS Boilerplate
# ================================================
# A production-ready starter boilerplate for building micro-SaaS applications
# using FastAPI, Pydantic v2, and Cloudflare Workers.

from fastapi import FastAPI, HTTPException
from pydantic import BaseModel, Field
from typing import Optional
import cloudflare_workers

# Define the application
app = FastAPI()

# Define the database connection
class Database:
    def __init__(self):
        self.conn = cloudflare_workers.D1()

def get_connection(self):
        return self.conn

# Define the user model
class User(BaseModel):
    id: int = Field(..., description="User ID")
    name: str = Field(..., description="User name")
    email: str = Field(..., description="User email")

# Define the user repository
class UserRepository:
    def __init__(self, db: Database):
        self.db = db

def get_user(self, user_id: int):
        """Get a user by ID"""
        try:
            user = self.db.get_connection().query("SELECT * FROM users WHERE id = $1", user_id)
            return User(**user

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