added the update for haystack search

app.py

@@ -287,9 +287,19 @@ if st.session_state.results:
         answer, context = result.answer, result.context
         start_idx = context.find(answer)
         end_idx = start_idx + len(answer)
-        source = f"[{result.meta['Title']}]({result.meta['link']})"
         # Hack due to this bug: https://github.com/streamlit/streamlit/issues/3190
-        st.write(
+        try:
+            source = f"[{result.meta['Title']}]({result.meta['link']})"
+            st.write(
             markdown(f'**Source:** {source} \n {context[:start_idx] } {str(annotation(answer, "ANSWER", "#8ef"))} {context[end_idx:]} \n '),
             unsafe_allow_html=True,
-        )
+             )
+        except:
+            filename = result.meta.get('filename', "")
+            st.write(
+            markdown(f'From file: {filename} \n {context[:start_idx] } {str(annotation(answer, "ANSWER", "#8ef"))} {context[end_idx:]} \n '),
+            unsafe_allow_html=True,
+            )
+
+        
+