Is there a way to vectorize at the object level when using Weaviate as vector database?

[junbetterway]

Currently, there is no way to pass an object for vectorization which Weaviate supports at the object level by following some rules outlined here.

And from dev.langchain4j.store.embedding.weaviate.WeaviateEmbeddingStore it only uses one property as text key:

    private WeaviateObject buildObject(String id, Embedding embedding, String text) {
        Map<String, Object> props = new HashMap();
        props.put("text", text);
        return WeaviateObject.builder().className(this.objectClass).id(id).vector((Float[])embedding.vectorAsList().toArray(new Float[0])).properties(props).build();
    }

Our use-case is that we need to store other information such as the references like Guru URLs, Guru IDs etc., for our FAQ articles. So basically, if an answer was provided, our management team would like me to show too the FAQ card source from our Guru.
Is there a workaround to achieve this? 🤔 - thanks!

[langchain4j]

HI @junbetterway sorry for the late response.

The link you provided describes extra Weaviate modules that can perform embedding/vectorization inside the Weaviate itself. This is not supported in LC4j API now. Now you cna use any EmbeddingModel to do embedding/vectorization and then store it into Weaviate or any other EmbeddingStore inplementation.

Could you elaborate more on your use case? Do mean you want to store some metadata associated with the text and then access it after relevant segments are found? This is already supported, you can put extra fields into TextSegment.Metadata.

[junbetterway]

No worries and thanks for the info about the TextSegment.Metadata - I will try to test this out, if this suffice our use case.