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Updated 2 months ago

Retrieving Nodes From Vector Store

Hi! I'm trying to get a list of nodes given a bunch of node ids from a given vector store. In testing, however, it seems that the default vector store does not let me do this. I need a cross-store compatible way to do this, but don't know how to accomplish this.

8 comments

LLogan M

there is a vector_store.get_nodes() method that is slowly being implemented across vector stores (funny enough, the way the default vector store works, this can't really be implemented there)

sspeed lump

ah, that's fun. Is there any way to work around this? We're mostly using in memory vector stores for the time being until we get a vector database

sspeed lump

At the end of the day it's mostly because I need to update the metadata on a NodeWithScore and push it to update and there doesn't seem to be a way to do that

sspeed lump

I'll try adding the missing get_doc_id function to each node and seeing if thatg helps

LLogan M

you could use the docstore (which should be populated, if you are using the default vector store)

all_nodes = index.docstore.docs
one_node = all_nodes['node_id']

sspeed lump

Would that work across all vector stores?

sspeed lump

Also, thanks for your help

LLogan M

yessss assuming you

set store_nodes_override=True in the constructor
persist and load the docstore somewhere

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