collection.upsert() and client.get_or_create_collection()

[wmbutler]

Thanks for your work on this. I'm really enjoying Langchain, Chroma and OpenAI.

I am using this plugin as follows and it works great. I'm trying to also safeguard against creating new collections when one already exists. Also trying to do the same thing for items in the collection. Ideally, I'd like to know how to incorporate

client.get_or_create_collection
collection.upsert()

into my code below to facilitate this. I've started going down the path of building the db natively with Chroma, but thought it might be possible to do it in langchain with this plugin.

db = Chroma.from_texts(texts, embeddings, metadatas=metadatas, ids=ids, collection_name=collection_name, persist_directory="db")