feat: Added default message for no data source!

subquery.py

@@ -7,7 +7,7 @@
 from llama_index.question_gen.guidance import GuidanceQuestionGenerator
 from tc_hivemind_backend.db.utils.preprocess_text import BasePreprocessor
 from tc_hivemind_backend.embeddings.cohere import CohereEmbedding
-from utils.globals import INVALID_QUERY_RESPONSE
+from utils.globals import INVALID_QUERY_RESPONSE, NO_ANSWER_REFERENCE
 from utils.qdrant_utils import QDrantUtils
 from utils.query_engine import (
     DEFAULT_GUIDANCE_SUB_QUESTION_PROMPT_TMPL,
@@ -228,4 +228,7 @@ def query_multiple_source(
     )
     response, source_nodes = result
 
-    return response.response, source_nodes
+    if source_nodes == []:
+        return NO_ANSWER_REFERENCE, source_nodes
+    else:
+        return response.response, source_nodes

utils/globals.py

@@ -5,3 +5,7 @@
     "We're unable to process your query. Please refine it and try again."
 )
 QUERY_ERROR_MESSAGE = "Sorry, we're unable to process your question at the moment. Please try again later."
+NO_ANSWER_REFERENCE = (
+    "Current documentation and community chats draw a blank. "
+    "Please ask the community manager for intel and we'll take notes for next time 🙂"
+)