⚡ Live Sandbox: AI Dev Tool: Rust WebAssembly Edge (ho8j)

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```python
# AI Dev Tool: Edge Function Vector Search API
# =============================================
# A production-ready Edge Function API for vector search using Cloudflare Workers, Hono, and PostgreSQL.

import os
import json
from typing import Dict, List
from pydantic import BaseModel
from hono import Hono
from cloudflare import WorkersKV
from psycopg2 import connect
from psycopg2.extras import DictCursor

# Define the Vector Search API model
class VectorSearchModel(BaseModel):
    """Vector Search API model"""
    query: str
    limit: int = 10

# Define the Edge Function API
class EdgeFunctionAPI:
    """Edge Function API for vector search"""
    def __init__(self, pg_conn: str, kv_namespace: str):
        self.pg_conn = pg_conn
        self.kv_namespace = kv_namespace
        self.hono = Hono()
        self.kv = WorkersKV(namespace=kv_namespace)

async def vector_search(self, model: VectorSearchModel):
        """Perform vector search using PostgreSQL and return results"""
        # Connect to PostgreSQL database
        conn = connect(self.pg_conn)
        cur = conn.cursor(cursor_factory=DictCursor)

# Execute vector search query
        cur

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