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Setting a new min/max value for a numeric slider causes an exception #47

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Setting a new min/max value for a numeric slider causes an exception#47

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@bmckalla
bmckalla
opened on Apr 22, 2025

When trying to update a numeric slider (only tested on IntRangeSlider) and the min or max value is update, it causes a traitlets.traitlets.TraitError.

Case where new min > current max:

Reacton.slider.issue.-.pt.1.mov

The order of the attributes being input set seems to mitigate the issue:

Reacton.slider.issue.-.pt.2.mov

But if you update to a different value, it can still break. Case where new max < current min:

Reacton.slider.issue.-.pt.3.mov

I would think these lines would handle catching that?

reacton/reacton/core.py

Lines 1980 to 1985 in 51e6eda

try:
el._update_widget(widget_previous, el_prev, kwargs)
except BaseException as e:
context.exceptions_self.append(e)
self._rerender_needed_reasons.append(RerenderReason(reason="Exception ocurred during reconciliation (updating widget)"))
self._rerender_needed = True

Activity

  1. bmckalla commented on Apr 22, 2025

    @bmckalla
    bmckalla
    on Apr 22, 2025
    Author

    While I understand having logic of setting to a particular range of max / min in a loop may mitigate these issues, it seems a bit silly considering the problem is the order of attributes being set.

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