community[patch]: Instantiate Chroma client properly

[Doug-Bowen]

Fixes: Properly instantiate Chroma client based on chromadb v1.8.1.

Context:

• In LangChainAI, it is possible to pass in a ChromaClient when working with chromadb.
• In LangChainJS, this is not listed in our documentation.
• Once I instantiated the client and passed it in, it worked.
• This change corrects the issues that LangChainJS has when instantiating a ChromaClient

Mainly, Chroma would throw when executing getOrCreateCollection()

throw new Error(`Chroma getOrCreateCollection error: ${err}`);

This was my workaround:

        const chromaClient = new (await Chroma.imports()).ChromaClient;
        const vectorStore = new Chroma(embeddings, { 
            collectionName: "code_base",
            url: process.env.VECTOR_STORE_URL,
            index: chromaClient
        });

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Name	Status	Preview	Comments	Updated (UTC)
langchainjs-api-refs	🛑 Canceled (Inspect)			Apr 3, 2024 5:33am
langchainjs-docs	🛑 Canceled (Inspect)			Apr 3, 2024 5:33am

[jeffchuber]

@Doug-Bowen thank you! I will take a look deeper this afternoon <3

[jacoblee93]

Thank you!

[jeffchuber]

@Doug-Bowen thank you Doug!