[FEATURE] Metadata UUID Support

[humcqc]

[FEATURE] Metadata UUID Support #1164

[langchain4j]

@humcqc thank you! Do tests pass for all EmbeddingStores that support storing metadata?

[humcqc]

@humcqc thank you! Do tests pass for all EmbeddingStores that support storing metadata?

I've just tested the ones having the filter test : EmbeddingStoreWithFilteringIT
-> ElasticSearch, Milvus, InMemory, PG Vector ( JSON, JSONB, Columns)

[sjivan]

@langchain4j @humcqc Any chance we can get this approved and merged? With PgVectorEmbeddingStore I'd like to add a metadata column of type UUID which points to the parent table PK of the embedding table which has a type UUID.

[humcqc]

@langchain4j @humcqc Any chance we can get this approved and merged? With PgVectorEmbeddingStore I'd like to add a metadata column of type UUID which points to the parent table PK of the embedding table which has a type UUID.

@langchain4j It should be ok to merge.

@sjivan by that time you can still use deprecated method :

    @Deprecated
    public Metadata add(String key, Object value) {
        return put(key, value.toString());
    }

[sjivan]

@langchain4j @humcqc Any chance we can get this approved and merged? With PgVectorEmbeddingStore I'd like to add a metadata column of type UUID which points to the parent table PK of the embedding table which has a type UUID.

@langchain4j It should be ok to merge.

@sjivan by that time you can still use deprecated method :

    @Deprecated
    public Metadata add(String key, Object value) {
        return put(key, value.toString());
    }

@humcqc thanks for getting the PR ready to merge. The workaround of the deprecated method does not work with PgVectorEmbeddingStore metadata because if the field in question is declared as "foo uuid", when the retreiver reads the column "foo" it introspects the type via JDBC and when it sees its of type UUID, it fails with an unssupported type exception. Hopefully this is no longer the case after change.

[langchain4j]

@humcqc thanks a lot!

Please update Weaviate ITs, "uuid" field needs to be added to metadataKeys, otherwise it fails

[humcqc]

@langchain4j Done.

[humcqc]

@langchain4j I've seen that some modules are in java 17
Is it possible to do the same thing for langchain4j-ollama ?

[langchain4j]

@humcqc yes, if there is a good reason for that

[langchain4j]

@humcqc good job, thank you!