Update app.py

app.py

@@ -124,6 +124,7 @@ def split_biomodels(antimony_file_path):
                 file_content = f.read()
                 items = text_splitter.create_documents([file_content])
                 for item in items:
+                    item = str(item)
                     final_items.append(item)
                 break
         except Exception as e:
@@ -272,12 +273,20 @@ def streamlit_app():
                     
                     convert_sbml_to_antimony(model_file_path, antimony_file_path)
                     
-                    final_items = split_biomodels(antimony_file_path)
+                    # Ensure this returns items and not an empty list
+                    final_items.extend(split_biomodels(antimony_file_path))
                 
-                db = create_vector_db(final_items)
-                
-                st.write("Models have been processed and added to the database.")
+                # Ensure final_items is not empty before creating the database
+                if final_items:
+                    db = create_vector_db(final_items)
+                    st.write("Models have been processed and added to the database.")
+                else:
+                    st.error("No items found in the models. Check if the Antimony files were generated correctly.")
+
+                st.write("Models have processed and written to the database.")
+
     
+    # Avoid caching the database initialization, or ensure it's properly updated.
     @st.cache_resource
     def get_messages():
         if "messages" not in st.session_state: