From e9d67cc63e323c398ec59b7a328912f017a0309d Mon Sep 17 00:00:00 2001
From: Brendan Quinn <brendan-quinn@northwestern.edu>
Date: Mon, 22 Apr 2024 18:22:03 +0000
Subject: [PATCH] Updates hybrid search query to match against all_titles using
 the 'and' operator and the 'english' stopword analyzer.

---
 chat/src/helpers/response.py | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/chat/src/helpers/response.py b/chat/src/helpers/response.py
index 351be8ff..156f9048 100644
--- a/chat/src/helpers/response.py
+++ b/chat/src/helpers/response.py
@@ -48,7 +48,15 @@ def extract_prompt_value(v):
     
 def prepare_response(config):
     try:
-        subquery = {"match": {"all_text": {"query": config.question}}}
+        subquery = { 
+            "match": {
+                "all_titles":  {
+                    "query": config.question, 
+                    "operator": "AND",
+                    "analyzer": "english"
+                }
+            }
+        }
         docs = config.opensearch.similarity_search(
             query=config.question, k=config.k, subquery=subquery, _source={"excludes": ["embedding"]}
         )