alexray92 opened a new issue, #34291:
URL: https://github.com/apache/superset/issues/34291
### Bug description
I developed a dashboard on one Superset instance, which I recently upgraded
from 4.0.1 to 4.1.2. The dashboard there works fine. But after exporting the
dashboard then importing it to a new 4.1.2 instance, the dashboard gives this
error on load: "Error loading chart datasources. Filters may not work
correctly."
However, all charts appear to function correctly and all filters appear to
work. I tried this:
1. Delete all charts and datasets and dashboards and re-try import
2. Make a new export and try importing it
3. Export the problematic dashboard and then try re-importing it to the same
instance
4. Upgrade then to 4.1.3 and try re-importing dashboard
#3 failed on import with this error (on 4.1.2):
(see additional context)
Additionally, the error on the dashboard seems to be because the following
API call (both 4.1.2 and 4.1.3):
(see additional context)
### Screenshots/recordings
_No response_
### Superset version
4.1.3
### Python version
3.10
### Node version
16
### Browser
Chrome
### Additional context
Export/Import problem dashboard error
`2025-07-23
17:12:36,507:ERROR:superset.commands.dashboard.importers.dispatcher:Error
running import command
Traceback (most recent call last):
File "/app/superset/commands/importers/v1/__init__.py", line 76, in run
self._import(self._configs, self.overwrite)
File "/app/superset/commands/dashboard/importers/v1/__init__.py", line
117, in _import
config = update_chart_config_dataset(config, dataset_dict)
File "/app/superset/commands/utils.py", line 217, in
update_chart_config_dataset
query_context["form_data"]["datasource"] = dataset_uid
TypeError: 'str' object does not support item assignment
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
File "/app/superset/commands/dashboard/importers/dispatcher.py", line 57,
in run
command.run()
File "/app/superset/utils/decorators.py", line 266, in wrapped
return on_error(ex)
File "/app/superset/utils/decorators.py", line 236, in on_error
raise ex
File "/app/superset/utils/decorators.py", line 259, in wrapped
result = func(*args, **kwargs)
File "/app/superset/commands/importers/v1/__init__.py", line 80, in run
raise self.import_error() from ex
superset.commands.dashboard.exceptions.DashboardImportError: Import
dashboard failed for an unknown reason
2025-07-23
17:12:36,508:WARNING:superset.views.error_handling:CommandException
Traceback (most recent call last):
File "/app/superset/commands/importers/v1/__init__.py", line 76, in run
self._import(self._configs, self.overwrite)
File "/app/superset/commands/dashboard/importers/v1/__init__.py", line
117, in _import
config = update_chart_config_dataset(config, dataset_dict)
File "/app/superset/commands/utils.py", line 217, in
update_chart_config_dataset
query_context["form_data"]["datasource"] = dataset_uid
TypeError: 'str' object does not support item assignment
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
File "/usr/local/lib/python3.10/site-packages/flask/app.py", line 1484, in
full_dispatch_request
rv = self.dispatch_request()
File "/usr/local/lib/python3.10/site-packages/flask/app.py", line 1469, in
dispatch_request
return self.ensure_sync(self.view_functions[rule.endpoint])(**view_args)
File
"/usr/local/lib/python3.10/site-packages/flask_appbuilder/security/decorators.py",
line 95, in wraps
return f(self, *args, **kwargs)
File "/app/superset/views/base_api.py", line 119, in wraps
duration, response = time_function(f, self, *args, **kwargs)
File "/app/superset/utils/core.py", line 1364, in time_function
response = func(*args, **kwargs)
File "/app/superset/utils/log.py", line 303, in wrapper
value = f(*args, **kwargs)
File "/app/superset/views/base_api.py", line 106, in wraps
return f(self, *args, **kwargs)
File "/app/superset/dashboards/api.py", line 1408, in import_
command.run()
File "/app/superset/commands/dashboard/importers/dispatcher.py", line 57,
in run
command.run()
File "/app/superset/utils/decorators.py", line 266, in wrapped
return on_error(ex)
File "/app/superset/utils/decorators.py", line 236, in on_error
raise ex
File "/app/superset/utils/decorators.py", line 259, in wrapped
result = func(*args, **kwargs)
File "/app/superset/commands/importers/v1/__init__.py", line 80, in run
raise self.import_error() from ex
superset.commands.dashboard.exceptions.DashboardImportError: Import
dashboard failed for an unknown reason`
----
GET api/v1/dashboard/5/datasets
returns
`{"message":"Fatal error"}
2025-07-23 21:49:23,567:ERROR:flask_appbuilder.api:'str' object has no
attribute 'get'
Traceback (most recent call last):
File
"/usr/local/lib/python3.10/site-packages/flask_appbuilder/api/__init__.py",
line 111, in wraps
return f(self, *args, **kwargs)
File "/app/superset/views/base_api.py", line 119, in wraps
duration, response = time_function(f, self, *args, **kwargs)
File "/app/superset/utils/core.py", line 1364, in time_function
response = func(*args, **kwargs)
File "/app/superset/utils/log.py", line 303, in wrapper
value = f(*args, **kwargs)
File "/app/superset/dashboards/api.py", line 420, in get_datasets
datasets = DashboardDAO.get_datasets_for_dashboard(id_or_slug)
File "/app/superset/daos/dashboard.py", line 81, in
get_datasets_for_dashboard
return dashboard.datasets_trimmed_for_slices()
File "/app/superset/models/dashboard.py", line 283, in
datasets_trimmed_for_slices
result.append(datasource.data_for_slices(slices))
File "/app/superset/connectors/sqla/models.py", line 446, in
data_for_slices
query_context = slc.get_query_context()
File "/app/superset/models/slice.py", line 289, in get_query_context
return self.get_query_context_factory().create(
File "/app/superset/common/query_context_factory.py", line 63, in create
if form_data and form_data.get("slice_id") is not None:
AttributeError: 'str' object has no attribute 'get'`
### Checklist
- [x] I have searched Superset docs and Slack and didn't find a solution to
my problem.
- [x] I have searched the GitHub issue tracker and didn't find a similar bug
report.
- [x] I have checked Superset's logs for errors and if I found a relevant
Python stacktrace, I included it here as text in the "additional context"
section.
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