I’ve been using WPAlchemy on sites for a while now without problems. Now I’ve stumbled upon a problem I can’t seem to solve properly.

Is it possible to nest two or more ‘have_fields_and_multi’ loops? Every time I insert one into another the script breaks and creates an infinite loop with incorrect field nesting (it keeps creating the same elements inside each instance of itself). In pseudo-code my implementation looks like this:

while ( $mb -> have_fields_and_multi( ‘foo’ ) ) {
// Open a new container for a parent item listing
// e.g. a category of sorts. These should be able
// to be added as the user wishes.

while ( $mb -> have_fields_and_multi( ‘bar’ ) ) {
// Make repeating fields inside the parent
// category loop.
} // child loop

} // parent loop

(I’ve properly inserted group opens and closes, also the add/delete buttons in their correct locations.)

This creates an infinite loop and the controls are not working properly (e.g. the inner loop has a ‘dodelete’ -button, but it removes everything including the parent loop in its entirety).

Is there any workaround to get this functioning properly or should I try some other approach?

Could you help me troubleshoot something? I’m pretty much following your example exactly for an endlessly repeating field, but the “Add” button isn’t actually replicating the field.

Here is how I create the meta_box instance:

$sidebar_images_metabox = new WPAlchemy_MetaBox(array
(
'id' => '_sidebar_images_meta',
'title' => 'Sidebar Images',
'template' => TEMPLATEPATH . '/custom/sidebar_images_meta.php',
'types' => array('page'),
'exclude_template' => 'index.php',
'priority' => 'high'
));


Here is my template:

<?php while($mb->have_fields_and_multi('sidebar_image')): ?>

<?php $mb->the_group_open(); ?>
 
	<label>The Image Path</label>
 
	<p>
		<?php $mb->the_field('src'); ?>
		<input type="text" name="<?php $mb->the_name(); ?>" value="<?php $mb->the_value(); ?>"/>
		<span>Using the "<em>Add an Image</em>" button, Upload an image and paste the URL here. Images will be resized automatically.</span>
	</p>
 
	<label>ALT Description <span>(optional)</span></label>
 
	<p>
		<?php $mb->the_field('alt'); ?>
		<textarea name="<?php $mb->the_name(); ?>" rows="3"><?php $mb->the_value(); ?></textarea>
		<span>Enter in an ALT description.</span>
	</p>

</div>
<?php $mb->the_group_close(); ?>
<?php endwhile; ?>
 
<p style="margin-bottom:15px; padding-top:5px;"><a href="#" class="docopy-sidebar_image button">Add Anoter Image</a></p>

Again, just can’t get the field to replicate when clicking “Add Another Image.” Any ideas?

There currently isn’t a discussion group for the code, but I am looking into something better than the WordPress commenting system for discussion. For now you can post your comments and questions on the wpalchemy page.

Horia, I think your pretty close and seems like you already know what the solution will be, try something like:

<?php while($mb->have_fields('book',sizeof($the_books))): ?>

	<?php $the_book = $the_books[$mb->get_the_index()]; ?>

	<input type="checkbox" name="<?php $mb->the_name(); ?>" id="<?php $mb->the_name(); ?>" value="<?php echo $the_book->name; ?>"<?php if($mb->is_value($the_book->name)) echo ' checked="checked"'; ?>/>
		<label for="<?php $mb->the_name(); ?>"><?php echo $the_book->name; ?>

<?php endwhile; ?>

I take the list of books from the db, store them in $the_books array and try to create a checkbox and a label for every book using WPAlchemy loop :
while($metabox->have_fields('book', sizeof($the_books))):

Perhaps my thinking here is wrong, but how would you create something like this ?

When I check a book and update page, the value is saved fine and I can read it fine on the frontend, but I can’t make it display right in the admin. The problem I think is that when I create this inputs and labels, I use $metabox->the_name() but can’t use $metabox->the_value() because I have to display the name of the books from the array : $the_books[$count_books]->name;.

Hope you understood the problem and let me know if you think this is possible.
Thank you.

Here is the full code I am using in the metabox template :

get_results('SELECT name FROM wp_wpsc_product_list WHERE active = 1 AND publish = 1');
?>

have_fields('book', sizeof($the_books))): ?>
	
    	<input type="checkbox" name="the_name(); ?>" id="the_name(); ?>" value="name; ?>" get_the_value()) echo ' checked="checked"'; ?> />
        <label for="the_name(); ?>">name; ?> get_the_value()) echo 'value= '.$metabox->get_the_value(); ?>

@Derbois, I am glad you found your solution … let me know what adjustments you made to solve your problem, this will definitely help me improve the code overall.

My code is a bit “tricky” but if I’ll enhance.it, I will share it.

The problem was in the “clone js script” in your MetaBox class. Your original clone script duplicate form elements “id” thats why my other script(which return the url to the field couldn’t work) (the duplicated field with the “display:none” field and with the class ” last tocopy” haved the same Id as the field with the class “last “.