i think the reason why have this error is because of that
cake supposes the input is from a multiple-select-box, whose value is
an array, but not from a single-select-box (dorp-down-box), whose
value is a single string. so when cake tries to read elements from an
array but the feed is a string, the error occurs.
by default, as grigri said, cake thinks multi-select-box for the habtm
relation since you set that there may be many. if this relation is not
exactly as expected, i would change it if i were you since there may
be more extra database queries (costs) made based on this relation.
good luck!
Steve
On Apr 16, 6:11 am, Björn Biele <[EMAIL PROTECTED]> wrote:
> If I want to save the B's which have/belong to A one by one it is a
> proper solution not to use a multiple select box.
>
> Finally i got the idea using:
>
> $form->input('Local', array('multiple' => false))
>
> could help and it worked!
>
> The fact that using 'type' => 'select' is producing messed up data
> seems pretty weird though to me!
>
> > Read :http://book.cakephp.org/view/85/saving-related-model-data-habt
>
> > It describes the proper way to create a habtm form and save the
> > related data [especially the last sentence!].
>
> > Also, I'm not sure I understand about the multiple-select-box. You've
> > defined an assoiciation where `A` has and belongs to *many* `B`, but
> > you don't want the select box to be multiple? How does this work?
>
> > On Apr 16, 1:36 pm, B3 <[EMAIL PROTECTED]> wrote:
> >> Hi,
>
> >> I recently noticed a weird issue regarding the form helper.
>
> >> I have a model with 2 habtm associations - one of them being 'Local'.
> >> So here's what I don't understand:
>
> >> When using
>
> >> $form->input('Local')
>
> >> in an add/edit-form cake's rendering a multiple-select-box, which is
> >> not my intention and also space-wasting but working great!
> >> So I substituted that line with:
>
> >> $form->input('Local', array('type' => 'select'))
>
> >> Cake now renders the desired select-box, but when trying to save the
> >> form I get following errors:
>
> >> Warning (2): Invalid argument supplied for foreach() [CORE/cake/libs/
> >> model/model.php, line 1284]
> >> Warning (2): Cannot modify header information - headers already sent
> >> by (output started at /path/to/cake/basics.php:338) [CORE/cake/libs/
> >> controller/controller.php, line 546]
>
> >> The association also doesn't get saved. I can imagine that my post-
> >> data is corrupt when using the drop-down-box. Why's that?
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