Update app.py

app.py

@@ -138,12 +138,13 @@ def initialize_vector_store(documents, persist_dir):
     embeddings = HuggingFaceEmbeddings()
     vectordb = Chroma.from_documents(
         documents=documents, 
-        embedding_function=embeddings, 
+        embedding_function=embeddings.embed_query,  # Use .embed_query explicitly
         persist_directory=persist_dir
     )
     vectordb.persist()  # Persist the vector store to disk
     return vectordb
 
+
 def create_retriever(vectordb):
     """
     Create a retriever from the vector store.