andriyko

Hello. I am trying to use PropertyGraphIndex with SimplePropertyGraphStore to store data from netwokx graph. The nodes and edges from the networkx graph are upserted into the graph store as EntityNode and Relation instances. I can get data from the store using methods like graph_store.get using properties or ids. But I don't understand how to query the index. The index is created using index = PropertyGraphIndex.from_existing(property_graph_store=graph_store).

Then, the query engine is created as

Plain Text

llm_synonym_retriever = LLMSynonymRetriever(
    index.property_graph_store,
    llm=llm,
    include_text=False,
)
vector_context_retriever = VectorContextRetriever(
    index.property_graph_store,
    embed_model=HuggingFaceEmbedding(model_name="BAAI/bge-small-en-v1.5"),
    include_text=False,
) 
query_engine = index.as_query_engine(
    sub_retrievers=[
        vector_context_retriever,
        llm_synonym_retriever,
    ],
    llm=llm,
)
# llm is Ollama(model="llama3")

The problem is that query_engine.query() always returns empty response.

Plain Text

response = query_engine.query("What is the email address of user Fname Lname?")

Find answers from the community

Hello. I am trying to use