fix datatime filed

api/core/data_loader/loader/excel.py

@@ -36,7 +36,7 @@ class ExcelLoader(BaseLoader):
                 if keys == []:
                     keys = list(map(str, row))
                 else:
-                    row_dict = dict(zip(keys, row))
+                    row_dict = dict(zip(keys, list(map(str, row))))
                     row_dict = {k: v for k, v in row_dict.items() if v}
                     item = ''.join(f'{k}:{v}\n' for k, v in row_dict.items())
                     data.append(item)