Available languages widget requiring selection

[wesleybl]

BUG/PROBLEM REPORT (OR OTHER COMMON ISSUE)

Available languages widget requiring selection, even after sending the languages from one box to another.

What I did:

• I accessed the Language controlpanel. For example: https://classic.demo.plone.org/@@language-controlpanel
• Do not add any languages in Available languages.
• Click save.

What I expect to happen:

• The form will be saved.

What actually happened:

The form displays the validation message Select an item from the list. This appears to be javascript validation, since no request is made.

What version of Plone/ Addons I am using:

Plone 6.0.6 (6017) CMF 3.0 Zope 5.8.3 Python 3.11.1 (main, Dec 7 2022, 01:11:34) [GCC 11.3.0] PIL 9.5.0 (Pillow) WSGI: On Server: waitress 2.1.2

[wesleybl]

@petschki @thet is this something from the mockup?

[petschki]

This is because the values on the right side must be pre-selected, otherwise they are missing in the request. This is fixed in plone.app.z3cform==4.3.0 (see https://github.com/plone/plone.app.z3cform/commit/2c85c7cf204fa291e3d64b67c4f862b1bed6e40c) but Plone 6.0.6 uses 4.2.1... so defintifely fixed in the upcoming 6.0.7 version...

[wesleybl]

@petschki would it still be a problem if someone unchecked all or items in the right box?

[petschki]

If you uncheck all values from a required orderedselectfieldwidget pat-validationshows the message above immediately and you cannot click the save button (in 6.0.6 cancel button is also disabled, but that got fixed in mockup and patternslib also some time ago). This widget is based on a very old z3c.form template and JS implementation which is pretty outdated (see also https://github.com/plone/plone.app.z3cform/issues/184) and I would be happy to see a better implementation than this (eg. AjaxSelectWidget like the keywords field uses ... )

[wesleybl]

Yes. It shouldn't be necessary to select an item. The box itself is the selection. Thanks!