AzionRetriever

process.env.AZION_TOKEN = "your-api-key"

process.env.OPENAI_API_KEY = "YOUR_API_KEY";

// process.env.LANGSMITH_API_KEY = "<YOUR API KEY HERE>";
// process.env.LANGSMITH_TRACING = "true";

import { AzionRetriever } from "@langchain/community/retrievers/azion_edgesql";
import { OpenAIEmbeddings } from "@langchain/openai";
import { ChatOpenAI } from "@langchain/openai";

const embeddingModel = new OpenAIEmbeddings({
  model: "text-embedding-3-small"
})

const chatModel = new ChatOpenAI({
  model: "gpt-4o-mini",
  apiKey: process.env.OPENAI_API_KEY
})

const retriever = new AzionRetriever(embeddingModel,
  {dbName:"langchain",
   vectorTable:"documents", // table where the vector embeddings are stored
   ftsTable:"documents_fts", // table where the fts index is stored
   searchType:"hybrid", // search type to use for the retriever
   ftsK:2, // number of results to return from the fts index
   similarityK:2, // number of results to return from the vector index
   metadataItems:["language","topic"],
   filters: [{ operator: "=", column: "language", value: "en" }],
   entityExtractor:chatModel

}) // number of results to return from the vector index

const query = "Australia"

await retriever.invoke(query);

[
  Document {
    pageContent: 'Australia s indigenous people have inhabited the continent for over 65,000 years',
    metadata: { language: 'en', topic: 'history', searchtype: 'similarity' },
    id: '3'
  },
  Document {
    pageContent: 'Australia is a leader in solar energy adoption and renewable technology',
    metadata: { language: 'en', topic: 'technology', searchtype: 'similarity' },
    id: '5'
  },
  Document {
    pageContent: 'Australia s tech sector is rapidly growing with innovation hubs in major cities',
    metadata: { language: 'en', topic: 'technology', searchtype: 'fts' },
    id: '7'
  }
]