feat: return first abstract sentence if title is empty

sorbobotapp/vector_store.py

@@ -222,6 +222,12 @@ class CustomVectorStore(VectorStore):
 
         return self._results_to_docs_and_scores(results)
 
+    @staticmethod
+    def _fetch_title(title:str, abstract:str):
+        if len(title) > 0:
+            return title
+        return abstract.split(".")[0]
+
     def _results_to_docs_and_scores(self, results: Any) -> List[Tuple[Document, float]]:
         """Return docs and scores from results."""
         docs = [
@@ -229,7 +235,7 @@ class CustomVectorStore(VectorStore):
                 Document(
                     page_content=json.dumps(
                         {
-                            "title": result["title"][0],
+                            "title": self._fetch_title(result["title"][0], result["abstract"][0]),
                             "authors": result["authors"],
                             "keywords": result["keywords"],
                         }