johannes-ws commented on issue #34718:
URL: https://github.com/apache/superset/issues/34718#issuecomment-3191653591

   I've already add that custom mapping into superset_config.py, but it gives 
this error message. @dosu 
   
       TypeError: can only concatenate list (not "tuple") to list
       127.0.0.1 - - [15/Aug/2025 14:32:57] "GET /health HTTP/1.1" 500 -
       Traceback (most recent call last):
         File "/app/.venv/lib/python3.11/site-packages/flask/cli.py", line 907, 
in app
           raise err from None
         File 
"/app/.venv/lib/python3.11/site-packages/werkzeug/debug/__init__.py", line 343, 
in debug_application
           app_iter = self.app(environ, start_response)
                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
         File "/app/.venv/lib/python3.11/site-packages/flask/cli.py", line 907, 
in app
           raise err from None
         File 
"/app/.venv/lib/python3.11/site-packages/werkzeug/debug/__init__.py", line 343, 
in debug_application
           app_iter = self.app(environ, start_response)
                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
         File "/app/.venv/lib/python3.11/site-packages/flask/cli.py", line 907, 
in app
           raise err from None
         File 
"/app/.venv/lib/python3.11/site-packages/werkzeug/debug/__init__.py", line 343, 
in debug_application
           app_iter = self.app(environ, start_response)
                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
         File "/app/.venv/lib/python3.11/site-packages/flask/cli.py", line 907, 
in app
           raise err from None
         File "/app/.venv/lib/python3.11/site-packages/flask/cli.py", line 898, 
in run_command
           app = info.load_app()
                 ^^^^^^^^^^^^^^^
         File "/app/.venv/lib/python3.11/site-packages/flask/cli.py", line 309, 
in load_app
           app = locate_app(import_name, name)
                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
         File "/app/.venv/lib/python3.11/site-packages/flask/cli.py", line 238, 
in locate_app
           return find_app_by_string(module, app_name)
                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
         File "/app/.venv/lib/python3.11/site-packages/flask/cli.py", line 166, 
in find_app_by_string
           app = attr(*args, **kwargs)
                 ^^^^^^^^^^^^^^^^^^^^^
         File "/app/superset/app.py", line 37, in create_app
           app.config.from_object(config_module)
         File "/app/.venv/lib/python3.11/site-packages/flask/config.py", line 
231, in from_object
           obj = import_string(obj)
                 ^^^^^^^^^^^^^^^^^^
         File "/app/.venv/lib/python3.11/site-packages/werkzeug/utils.py", line 
596, in import_string
           __import__(import_name)
         File "/app/superset/config.py", line 1955, in <module>
           import superset_config
         File "/app/docker/pythonpath_dev/superset_config.py", line 245, in 
<module>
           DuckDBEngineSpec.column_type_mappings = [
                                                   ^
       TypeError: can only concatenate list (not "tuple") to list


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