[TYPO3-core] Bug in FormEngine with "requestUpdate" and multiple select fields

[François Suter]

Hi all,

I just stumbled on a big in FormEngine and I would like to discuss 
possible solutions before submitting a patch.

The situation is the following: I have a select-type field with multiple 
choices possible, i.e. one which gets displayed with the two <select> 
elements side-by-side, and that field is registered with "requestUpdate".

When an item is selected in the right-hand selector, the update popup 
comes up. As soon as I click the "OK" button, the form is submitted. But 
there's also on onclick event on that field, which is supposed to pass 
the element that was selected on the right-hand side to the left-hand 
side. And that script does not have time to do its work, because the 
form has already been submitted. Hence the select field stays empty.

A very simple solution is to set an absolutely minimal timeout in 
TBE_EDITOR.submitForm() (10 milliseconds is enough) to give time to the 
other script to execute. Of course this is far from elegant. What we 
would need is some kind of feedback from the FormEngine JS object, so 
that TBE_EDITOR knows that it's safe to submit. But that rather complex, 
especially since currently the FormEngine script is anyway fired after 
the submission. Does anyone have other ideas?

Cheers

-- 

Francois Suter

Work: Cobweb Development Sarl - http://www.cobweb.ch

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