In the Tabulator of panel 1.3.2, using HTMLTemplateFormatter for the Index now raises an exception.

[kuri-menu]

It worked fine in panel 1.3.1

ALL software version info

Windows 10 python 3.11.6

bokeh 3.3.1
holoviews 1.18.1
panel 1.3.2
param 2.0.1
jupyter-bokeh 3.0.7
jupyter_client 7.4.9
jupyter_core 5.3.1
jupyter-events 0.6.3
jupyter-lsp 2.2.0
jupyter_server 2.5.0
jupyter_server_terminals 0.4.4
jupyterlab 4.0.9
jupyterlab-pygments 0.2.2
jupyterlab_server 2.23.0
jupyterlab-widgets 3.0.8
ipykernel 6.24.0

Description of expected behavior and the observed behavior

Complete, minimal, self-contained example code that reproduces the issue

from bokeh.models.widgets.tables import HTMLTemplateFormatter
import panel as pn
pn.extension('tabulator')

df = pd.DataFrame(
    {
        'A':[1,2,3],
        'B':[1,2,3],
    }
)
df = df.set_index('A')

tabu = pn.widgets.Tabulator(
    df,
    formatters=dict(
        A=HTMLTemplateFormatter(template='<a href="https://www.google.com/search?code=<%= value %>"><%= value %></a>'),
    ),
)
tabu

Stack traceback and/or browser JavaScript console output

---

AttributeError Traceback (most recent call last)
File ~\AppData\Local\Programs\Python\Python311\Lib\site-packages\IPython\core\formatters.py:974, in MimeBundleFormatter.call(self, obj, include, exclude)
971 method = get_real_method(obj, self.print_method)
973 if method is not None:
--> 974 return method(include=include, exclude=exclude)
975 return None
976 else:

File ~\AppData\Local\Programs\Python\Python311\Lib\site-packages\panel\viewable.py:774, in Viewable.repr_mimebundle(self, include, exclude)
771 loaded = hv.extension._loaded
773 if config.comms in ('vscode', 'ipywidgets'):
--> 774 widget = ipywidget(self)
775 if hasattr(widget, 'repr_mimebundle'):
776 return widget.repr_mimebundle(include=include, exclude=exclude), {}

File ~\AppData\Local\Programs\Python\Python311\Lib\site-packages\panel\io\notebook.py:527, in ipywidget(obj, doc, **kwargs)
525 from ..pane import panel
526 doc = doc if doc else Document()
--> 527 model = panel(obj, **kwargs).get_root(doc=doc)
528 widget = BokehModel(model, combine_events=True)
529 if hasattr(widget, '_view_count'):

File ~\AppData\Local\Programs\Python\Python311\Lib\site-packages\panel\viewable.py:670, in Renderable.get_root(self, doc, comm, preprocess)
668 root_view = wrapper
669 else:
--> 670 root = self._get_model(doc, comm=comm)
671 root_view = self
672 if preprocess:

File ~\AppData\Local\Programs\Python\Python311\Lib\site-packages\panel\widgets\tables.py:1679, in Tabulator._get_model(self, doc, root, parent, comm)
1672 def _get_model(
1673 self, doc: Document, root: Optional[Model] = None,
1674 parent: Optional[Model] = None, comm: Optional[Comm] = None
1675 ) -> Model:
1676 Tabulator._widget_type = lazy_load(
1677 'panel.models.tabulator', 'DataTabulator', isinstance(comm, JupyterComm), root
1678 )
-> 1679 model = super()._get_model(doc, root, parent, comm)
1680 root = root or model
1681 self._child_panels = child_panels = self._get_children()

File ~\AppData\Local\Programs\Python\Python311\Lib\site-packages\panel\widgets\tables.py:334, in BaseTable._get_model(self, doc, root, parent, comm)
330 def _get_model(
331 self, doc: Document, root: Optional[Model] = None,
332 parent: Optional[Model] = None, comm: Optional[Comm] = None
333 ) -> Model:
--> 334 properties = self._get_properties(doc)
335 model = self._widget_type(**properties)
336 root = root or model

File ~\AppData\Local\Programs\Python\Python311\Lib\site-packages\panel\widgets\tables.py:1637, in Tabulator._get_properties(self, doc)
1636 def _get_properties(self, doc: Document) -> Dict[str, Any]:
-> 1637 properties = super()._get_properties(doc)
1638 properties['configuration'] = self._get_configuration(properties['columns'])
1639 properties['cell_styles'] = self._get_style_data()

File ~\AppData\Local\Programs\Python\Python311\Lib\site-packages\panel\widgets\tables.py:325, in BaseTable._get_properties(self, doc)
323 def _get_properties(self, doc: Document) -> Dict[str, Any]:
324 properties = super()._get_properties(doc)
--> 325 properties['columns'] = self._get_columns()
326 properties['source'] = cds = ColumnDataSource(data=self._data)
327 cds.selected.indices = self.selection

File ~\AppData\Local\Programs\Python\Python311\Lib\site-packages\panel\widgets\tables.py:161, in BaseTable._get_columns(self)
159 fields = self._get_fields()
160 df = self.value.reset_index() if len(indexes) > 1 else self.value
--> 161 return self._get_column_definitions(fields, df)

File ~\AppData\Local\Programs\Python\Python311\Lib\site-packages\panel\widgets\tables.py:238, in BaseTable._get_column_definitions(self, col_names, df)
236 warn(msg, RuntimeWarning)
237 elif col in self.indexes:
--> 238 formatter.text_align = 'left'
240 if isinstance(self.widths, int):
241 col_kwargs['width'] = self.widths

File ~\AppData\Local\Programs\Python\Python311\Lib\site-packages\bokeh\core\has_props.py:340, in HasProps.setattr(self, name, value)
337 if isinstance(descriptor, property): # Python property
338 return super().setattr(name, value)
--> 340 self._raise_attribute_error_with_matches(name, properties)

File ~\AppData\Local\Programs\Python\Python311\Lib\site-packages\bokeh\core\has_props.py:375, in HasProps._raise_attribute_error_with_matches(self, name, properties)
372 if not matches:
373 matches, text = sorted(properties), "possible"
--> 375 raise AttributeError(f"unexpected attribute {name!r} to {self.class.name}, {text} attributes are {nice_join(matches)}")

AttributeError: unexpected attribute 'text_align' to HTMLTemplateFormatter, possible attributes are js_event_callbacks, js_property_callbacks, name, subscribed_events, syncable, tags or template

[hoxbro]

Introduced in #5866

Are you up for trying to fix this regression?

[kuri-menu]

I am unable to fix this regression.

[philippjfr]

May need a quick followup release (i.e. 1.3.3) for this one.