Update app.py

app.py

@@ -229,7 +229,8 @@ def message_and_history(message, history):
     conversation_context = "\n".join(
         [f"{msg['role']}: {msg['content'].replace('<b>LA2050 Navigator:</b><br>', '')}" for msg in history[-2:]]
     )
-    retrieved_docs = retriever.get_relevant_documents(conversation_context)
+        retrieved_docs = retriever.invoke(conversation_context)
+
     print(f"DEBUG: Retrieved {len(retrieved_docs)} documents.")
     for i, doc in enumerate(retrieved_docs):
         # Print out key metadata fields to verify correctness.