[FLOW3-general] Fluid: preselection with a multiple form.select with a M:N relation

[Matthias Habegger]

Hallo,

I have a M:N relation between my two models "book" and "category".


Now I try to create a multiple select with the SelectViewHelper like that:
--
<f:form.select property="categories" options="{categories}" 
optionLabelField="name" multiple="multiple" size="7" />
--


{categories} is a variable assigned in the controller.
--
$this->view->assign('categories', $this->categoryRepository->findAll());
--
that works fine, all, categories are shown in the select.


The problem is, that none of my preselected categories are selected.

The html output looks like that:
--
<input type="hidden" name="book[categories]" value="" />
<select id="categories" multiple="multiple" size="7" 
name="book[categories][]">
<option value="0bc305ec-8aff-4fa8-bdeb-476d7c21c841">Novels</option>
<option value="8c2221e3-a3fd-4ce2-8f7e-66aac9eed5f5">Second 
Category</option>
<option value="c1ca0c2d-08c4-4b22-b9c7-69bbd42de840">Third category</option>
</select>
--


What shall I do to get the preselection work

Greetings
Matthias