Docstore

The docstore is not used by default when using a vector db integration, all the nodes are serialized into chroma here

You can construct the index with an override to use the docstore if you want to

from_documents(..., store_nodes_override=True)

Chroma won't work with BM25 unless you have that override set, but then you also need to store/persist the docstore

Or you can just instantiate a docstore directly

If I created the index with from_documents(..., store_nodes_override=True) will I be able to use BM25 later by creating the index with from_vector_store(vector_store=vector_store) without having to create a separate docstore? Since Im pretty sure chroma stores the text documents too

chroma stores the documents/nodes, but they currently arent directly accessible (maybe this needs a PR). You need the docstore (which also involves storing/loading the docstore)

So, your code above would not work

Here's a link showing how to override and save/load with a vectodb integration (admittdly not very user friendly at the moment)

https://discord.com/channels/1059199217496772688/1163880111074971790/1163900056718553169

I agree, we should have chroma docs accessible in the future, thanks regardless!