we need a basic selection where a hidden type hint ist set when the property multiple is set to true. In the default implementation, a single value of a multiple select is stored as a none array type to fix this we have to add a type hint.
i've created a feature branch:
the new granite ui component is /apps/wcm-io/wcm/ui/granite/components/form/select
please give it a try if it works as expected.
get an exception while using the component:
please change the line 34 to:
thanks for the patch!
applied & merged feature to develop branch