[TYPO3-core] Bug #1578: Radio button validation does not work if there is only one radio button

[Michael Stucki]

Hi Sebastian,

> User writes:
> validateForm() will not correctly validate radio buttons if there is
> only one radio button in a group. This is because fObj.length
> (t3lib/jsfunc.validateform.js line 87) is undefined in this case, and
> therefore the validation loop is never entered and "value" remains
> undefined.
> 
> Solution:
>       * check if the length of the radio button can be found, if no,
>         then only one radio button is in the radio group.
> 
> Remarks:
>       * Normally, you don't need this case, however, sometimes
>         automatically radio buttons are created - and then it can happen
>         that just one radio button is shown.
>       * Please check the bugtracker reference for a working example.

+1

Michael
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