⚡ Live Sandbox: AI Dev Tool: AGENTSmd AINative SaaS Template

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```python
# AI Dev Tool: Turbocharge Micro-SaaS
# Production Starter Boilerplate for FastAPI, Pydantic v2, and PostgreSQL Vector Search Extension

from fastapi import FastAPI, Depends
from fastapi.responses import JSONResponse
from pydantic import BaseModel
from typing import List, Optional
import psycopg2
from psycopg2 import extras
from psycopg2.errors import DuplicateTable

# Initialize FastAPI app
app = FastAPI()

# Define Pydantic models
class User(BaseModel):
    id: int
    name: str
    email: str

class Item(BaseModel):
    id: int
    title: str
    description: str

# Define database connection settings
DATABASE_HOST = "localhost"
DATABASE_PORT = 5432
DATABASE_USER = "postgres"
DATABASE_PASSWORD = "postgres"
DATABASE_NAME = "mydatabase"

# Create a connection to the PostgreSQL database
def get_db_connection():
    try:
        conn = psycopg2.connect(
            host=DATABASE_HOST,
            port=DATABASE_PORT,
            user=DATABASE_USER,
            password=DATABASE_PASSWORD,
            database=DATABASE_NAME
        )
        return conn
    except psycopg2.Error as e:
        print(f"Error connecting to database

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