castodius commented on PR #33547:
URL: https://github.com/apache/superset/pull/33547#issuecomment-2911339611

   Sorry for the slow response, I was AFK for a couple of a days.
   
   When running things locally using the latest version of master I get the 
following error. The information about "overwrite=true" feels unimportant, the 
import fails before the frontend can provide with me with the option.
   
   > superset_app          | 2025-05-27 
06:40:02,296:WARNING:superset.commands.importers.v1:Import Error: 
{'template_params': ['Not a valid mapping type.']}
   superset_app          | 2025-05-27 
06:40:02,296:WARNING:superset.commands.importers.v1:Import Error: 
{'dashboards/FCC_New_Coder_Survey_2018_15.yaml': 'Dashboard already exists and 
`overwrite=true` was not passed'}
   superset_app          | 2025-05-27 06:40:02,296 INFO 
sqlalchemy.engine.Engine ROLLBACK
   superset_app          | 2025-05-27 
06:40:02,296:INFO:sqlalchemy.engine.Engine:ROLLBACK
   superset_app          | 2025-05-27 
06:40:02,296:INFO:superset.commands.dashboard.importers.dispatcher:Command 
failed validation
   superset_app          | 2025-05-27 
06:40:02,296:WARNING:superset.views.error_handling:CommandException
   superset_app          | Traceback (most recent call last):
   superset_app          |   File 
"/app/.venv/lib/python3.11/site-packages/flask/app.py", line 1484, in 
full_dispatch_request
   superset_app          |     rv = self.dispatch_request()
   superset_app          |          ^^^^^^^^^^^^^^^^^^^^^^^
   superset_app          |   File 
"/app/.venv/lib/python3.11/site-packages/flask/app.py", line 1469, in 
dispatch_request
   superset_app          |     return 
self.ensure_sync(self.view_functions[rule.endpoint])(**view_args)
   superset_app          |            
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   superset_app          |   File 
"/app/.venv/lib/python3.11/site-packages/flask_appbuilder/security/decorators.py",
 line 109, in wraps
   superset_app          |     return f(self, *args, **kwargs)
   superset_app          |            ^^^^^^^^^^^^^^^^^^^^^^^^
   superset_app          |   File "/app/superset/views/base_api.py", line 120, 
in wraps
   superset_app          |     duration, response = time_function(f, self, 
*args, **kwargs)
   superset_app          |                          
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   superset_app          |   File "/app/superset/utils/core.py", line 1371, in 
time_function
   superset_app          |     response = func(*args, **kwargs)
   superset_app          |                ^^^^^^^^^^^^^^^^^^^^^
   superset_app          |   File "/app/superset/utils/log.py", line 304, in 
wrapper
   superset_app          |     value = f(*args, **kwargs)
   superset_app          |             ^^^^^^^^^^^^^^^^^^
   superset_app          |   File "/app/superset/views/base_api.py", line 107, 
in wraps
   superset_app          |     return f(self, *args, **kwargs)
   superset_app          |            ^^^^^^^^^^^^^^^^^^^^^^^^
   superset_app          |   File "/app/superset/dashboards/api.py", line 1589, 
in import_
   superset_app          |     command.run()
   superset_app          |   File 
"/app/superset/commands/dashboard/importers/dispatcher.py", line 57, in run
   superset_app          |     command.run()
   superset_app          |   File "/app/superset/utils/decorators.py", line 
271, in wrapped
   superset_app          |     return on_error(ex)
   superset_app          |            ^^^^^^^^^^^^
   superset_app          |   File "/app/superset/utils/decorators.py", line 
236, in on_error
   superset_app          |     raise ex
   superset_app          |   File "/app/superset/utils/decorators.py", line 
264, in wrapped
   superset_app          |     result = func(*args, **kwargs)
   superset_app          |              ^^^^^^^^^^^^^^^^^^^^^
   superset_app          |   File 
"/app/superset/commands/importers/v1/__init__.py", line 84, in run
   superset_app          |     self.validate()
   superset_app          |   File 
"/app/superset/commands/importers/v1/__init__.py", line 120, in validate
   superset_app          |     raise CommandInvalidError(
   superset_app          | superset.commands.exceptions.CommandInvalidError: 
Error importing dashboard
   superset_app          | 2025-05-27 06:40:02,302:INFO:werkzeug:192.168.65.1 - 
- [27/May/2025 06:40:02] "POST /api/v1/dashboard/import/ HTTP/1.1" 422 -
   
   I believe the error occurs when marshmallow tries to validate the empty 
string as a dict. This would be the line: 
https://github.com/apache/superset/blob/master/superset/datasets/schemas.py#L285.
   
   


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