Voyage AI - Credentials, Embeddings and Rerank (#2015)

* Voyage AI - Credentials and Embeddings * reranker and fixes for embeddings
2026-06-29 11:01:18 +03:00 · 2024-03-26 11:50:16 +05:30
parent 6fd0fe60fc
commit 794818b434
6 changed files with 297 additions and 0 deletions
@@ -0,0 +1,52 @@
+import axios from 'axios'
+import { Callbacks } from '@langchain/core/callbacks/manager'
+import { Document } from '@langchain/core/documents'
+import { BaseDocumentCompressor } from 'langchain/retrievers/document_compressors'
+
+export class VoyageAIRerank extends BaseDocumentCompressor {
+    private voyageAIAPIKey: any
+    private readonly VOYAGEAI_RERANK_API_URL = 'https://api.voyageai.com/v1/rerank'
+    private model: string = 'rerank-lite-1'
+    private readonly k: number
+
+    constructor(voyageAIAPIKey: string, model: string, k: number) {
+        super()
+        this.voyageAIAPIKey = voyageAIAPIKey
+        this.model = model
+        this.k = k
+    }
+    async compressDocuments(
+        documents: Document<Record<string, any>>[],
+        query: string,
+        _?: Callbacks | undefined
+    ): Promise<Document<Record<string, any>>[]> {
+        // avoid empty api call
+        if (documents.length === 0) {
+            return []
+        }
+        const config = {
+            headers: {
+                Authorization: `Bearer ${this.voyageAIAPIKey}`,
+                'Content-Type': 'application/json',
+                Accept: 'application/json'
+            }
+        }
+        const data = {
+            model: this.model,
+            query: query,
+            documents: documents.map((doc) => doc.pageContent)
+        }
+        try {
+            let returnedDocs = await axios.post(this.VOYAGEAI_RERANK_API_URL, data, config)
+            const finalResults: Document<Record<string, any>>[] = []
+            returnedDocs.data.results.forEach((result: any) => {
+                const doc = documents[result.index]
+                doc.metadata.relevance_score = result.relevance_score
+                finalResults.push(doc)
+            })
+            return finalResults.splice(0, this.k)
+        } catch (error) {
+            return documents
+        }
+    }
+}