AttributeError: 'VoilaHandler' object has no attribute 'exporter'

[t8ch]

Using voila with the default template works fine but using gridstack prompts:

File "/home/user/miniconda3/lib/python3.7/site-packages/voila/handler.py", line 125, in _jinja_notebook_execute
File "/home/user/miniconda3/lib/python3.7/site-packages/voila/handler.py", line 125, in <lambda>
result.cells = list(filter(lambda cell: filter_empty_code_cells(cell, self.exporter), result.cells))
AttributeError: 'VoilaHandler' object has no attribute 'exporter' 
ERROR:tornado.general:Cannot send error response after headers written

this is the versions I am using (I have tried different orders of reinstalling libraries via conda):
voila 0.1.11 py_0 conda-forge
voila-gridstack 0.0.6 py_0 conda-forge

does anyone have an idea what the problem might be?

[jtpio]

Thanks @t8ch for the report.

This seems to be related to the recent switch to the progressive rendering for the default template in voila.
At the moment the gridstack does not implement progressive rendering and uses a different code path: https://github.com/voila-dashboards/voila/blob/80c1b499ee2c128a85587868bd60229a53c3b563/voila/handler.py#L123-L130

[t8ch]

Thanks a lot!
So, as I take it, the current version of voila is incompatible with the current version of gridstack? Just want to make sure I am not missing an obvious workaround (except downgrading).

[jtpio]

If you want you could stick to 0.1.10 for now until we fix it and make a new release (voila-dashboards/voila#389). The main change between 0.1.10 and 0.1.11 is the progressive rendering.

[jtpio]

@t8ch a new version of voila (0.1.12) has been published, and should be available on conda-forge really soon.

Let us know if it solves the issue!

[t8ch]

it does solve the problem! thanks.

(as of now, 0.1.12 is available through pip but not conda)

[jtpio]

Good to hear, closing as fixed!