reduce memory usage

sketch_map_tool/database/client_flask.py

@@ -87,14 +87,13 @@ def insert_files(files) -> list[int]:
         )
         """
     insert_query = "INSERT INTO blob(file_name, file) VALUES (%s, %s) RETURNING id"
-    data = [(secure_filename(file.filename), file.read()) for file in files]
     db_conn = open_connection()
     with db_conn.cursor() as curs:
         # executemany and fetchall does not work together
         curs.execute(create_query)
         ids = []
-        for d in data:
-            curs.execute(insert_query, d)
+        for file in files:
+            curs.execute(insert_query, (secure_filename(file.filename), file.read()))
             ids.append(curs.fetchone()[0])
     return ids
 

sketch_map_tool/routes.py

@@ -112,9 +112,12 @@ def digitize_results_post() -> Response:
             f"You can only upload up to {max_nr_simultaneous_uploads} files at once."
         )
     ids = db_client_flask.insert_files(files)
-    files_from_db = [db_client_flask.select_file(i) for i in ids]
+
     file_names = [db_client_flask.select_file_name(i) for i in ids]
-    args = [upload_processing.read_qr_code(to_array(file)) for file in files_from_db]
+    args = [
+        upload_processing.read_qr_code(to_array(db_client_flask.select_file(_id)))
+        for _id in ids
+    ]
     uuids = [args_["uuid"] for args_ in args]
     bboxes = [args_["bbox"] for args_ in args]
     map_frames = dict()