Error: Cannot read properties of undefined (reading 'embedDocuments')

[jiveshkalra]

Checked other resources

• I added a very descriptive title to this issue.
• I searched the LangChain.js documentation with the integrated search.
• I used the GitHub search to find a similar question and didn't find it.
• I am sure that this is a bug in LangChain.js rather than my code.
• The bug is not resolved by updating to the latest stable version of LangChain (or the specific integration package).

Example Code

  const vectorStore = await HNSWLib.fromTexts( final_posts,new HuggingFaceTransformersEmbeddings({model: "mixedbread-ai/mxbai-embed-large-v1"}));

Error Message and Stack Trace (if applicable)

Unhandled Runtime Error
Error: Cannot read properties of undefined (reading 'embedDocuments')

Source
app\actions\chatbot_action.jsx (43:36) @ fromTexts

  41 | 
  42 | 
> 43 | const vectorStore = await HNSWLib.fromTexts( final_posts,new HuggingFaceTransformersEmbeddings({model: "mixedbread-ai/mxbai-embed-large-v1",}));
     |                                  ^
  44 | const retriever = vectorStore.asRetriever();```

### Description

I am trying to set up a simple RAG with HNSWLib , I have my documents in final_post and I cant use OpenAI So I am going for opensource embedding model ,but I am unable to use that 

### System Info

Platform Windows
Node v20.9.0
langchain info ->
```markdown
langchain@0.1.34 | MIT | deps: 17 | versions: 265
Typescript bindings for langchain
https://github.com/langchain-ai/langchainjs/tree/main/langchain/

keywords: llm, ai, gpt3, chain, prompt, prompt engineering, chatgpt, machine learning, ml, openai, embeddings, vectorstores

dist
.tarball: https://registry.npmjs.org/langchain/-/langchain-0.1.34.tgz
.shasum: 3c28a6bde69c5f4ac3931376d34187de0e44e43a
.integrity: sha512-4TVH2mzhITrLPOeyfGucfqo1+360DJMl4+ItG56ApxVY1krO4hV0EkqcRLAxW06W6sIue8mIU70WbyhBYH68Ug==
.unpackedSize: 4.1 MB

dependencies:
@anthropic-ai/sdk: ^0.9.1     binary-extensions: ^2.2.0     langchainhub: ~0.0.8          p-retry: 4                    zod: ^3.22.4
@langchain/community: ~0.0.47 js-tiktoken: ^1.0.7           langsmith: ~0.1.7             uuid: ^9.0.0
@langchain/core: ~0.1.56      js-yaml: ^4.1.0               ml-distance: ^4.0.0           yaml: ^2.2.1
@langchain/openai: ~0.0.28    jsonpointer: ^5.0.1           openapi-types: ^12.1.3        zod-to-json-schema: ^3.22.3

maintainers:
- nfcampos <nuno@boringbits.io>
- jacoblee93 <jacoblee93@gmail.com>
- andrewnguonly <andrewnguonly@gmail.com>
- davidduong <david@duong.cz>
- hwchase17 <hw.chase.17@gmail.com>
- basproul <braceasproul@gmail.com>

dist-tags:
latest: 0.1.34     next: 0.1.29-rc.0

published 16 hours ago by jacoblee93 <jacoblee93@gmail.com>

[dosubot]

The error you're encountering, "Cannot read properties of undefined (reading 'embedDocuments')", indicates that the HuggingFaceTransformersEmbeddings object you're passing to HNSWLib.fromTexts might not be correctly instantiated or does not have the embedDocuments method defined. This method is essential for converting texts to vectors, which are then added to the HNSW index.

To resolve this issue, ensure that HuggingFaceTransformersEmbeddings is properly implemented and instantiated. It should adhere to the EmbeddingsInterface, which requires an embedDocuments method that takes an array of documents as input and returns a promise resolving to an array of vectors for each document.

Here's a quick checklist:

• Verify that HuggingFaceTransformersEmbeddings is compatible with LangChain.js and is correctly installed in your project.
• Ensure that HuggingFaceTransformersEmbeddings correctly implements the EmbeddingsInterface, especially the embedDocuments method.
• Double-check the instantiation of HuggingFaceTransformersEmbeddings before passing it to HNSWLib.fromTexts.

If after these checks the issue persists, it might be helpful to review the documentation or source code of HuggingFaceTransformersEmbeddings to ensure it's being used as intended.

Sources

• libs/langchain-community/src/vectorstores/hnswlib.ts
• langchain-core/src/embeddings.ts

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[jiveshkalra]

Also using Memory Vector store gives me even weirder error ->

ror: (0 , _xenova_transformers__WEBPACK_IMPORTED_MODULE_0__.pipeline) is not a function

Source
app\actions\chatbot_action.jsx (44:46) @ fromDocuments

  42 | 
  43 | 
> 44 | const vectorStore = await MemoryVectorStore.fromDocuments(final_posts,new HuggingFaceTransformersEmbeddings({model: "mixedbread-ai/mxbai-embed-large-v1",}));
     |                                            ^

in code I just only changed a one word in the code

  const vectorStore = await MemoryVectorStore.fromDocuments(final_posts,new HuggingFaceTransformersEmbeddings({model: "mixedbread-ai/mxbai-embed-large-v1",}));```