⚡ Live Sandbox: AI Dev Tool: FastAPI Pydantic v2 (okfd)

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```python
# AI Dev Tool: FastAPI Pydantic v2 Micro-SaaS Boilerplate
# Description: A production-ready FastAPI boilerplate with Pydantic v2 for building micro-SaaS applications
# Author: [Your Name]

from fastapi import FastAPI, HTTPException
from pydantic import BaseModel, Field
from typing import Optional
from fastapi.responses import JSONResponse
from fastapi.encoders import jsonable_encoder

# Define the FastAPI app
app = FastAPI(title="FastAPI Pydantic v2 Micro-SaaS Boilerplate", description="A production-ready FastAPI boilerplate with Pydantic v2 for building micro-SaaS applications", version="1.0.0")

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

# Define a Pydantic model for error responses
class ErrorResponse(BaseModel):
    error: str = Field(..., description="Error message")
    status_code: int = Field(..., description="HTTP status code")

# Define a route for creating a new

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