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

[Ivan Ruiz Gallego]

Hi Matthias,

If you want to preselect one of the select options you will need in most 
cases to set the attribute value to that object. So something like this:

<f:form.select property="categories" options="{allCategories}" 
value="{preselectedCategory}" />

If the option to be preselected results from from validation, FLOW3 will 
preselect it. So in that case you don't need to set the value.

Regards,
Ivan.

On 18.11.2011 15:13, Matthias Habegger wrote:
> 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