AI Dev Tool: FastAPI Pydantic v2 (qj2e)

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Preview Code

```python
# AI Dev Tool: FastAPI Pydantic v2 Micro-SaaS Boilerplate
# Description: Production-ready starter boilerplate for building micro-SaaS applications using FastAPI and Pydantic v2

from fastapi import FastAPI, HTTPException
from pydantic import BaseModel, validator
from typing import Optional
from psycopg2 import connect
from psycopg2.extras import DictCursor

# Initialize FastAPI app
app = FastAPI()

# Define PostgreSQL connection settings
POSTGRES_HOST = "localhost"
POSTGRES_DB = "mydatabase"
POSTGRES_USER = "myuser"
POSTGRES_PASSWORD = "mypassword"

# Define a Pydantic model for user data
class User(BaseModel):
    id: int
    name: str
    email: str

# ... full runnable version includes tests & documentation