Hi commnunity!
In my WordPress backend I have some custom posts and, in one of them, I want to display in a dropdown field some posts related with but ordered by post type. I want to display something like this.
<select multiple="multiple" style="height:200px; width:300px"> <optgroup label="Productos"> <option>Producto 1</option> <option>Producto 2</option> <option>Producto 3</option> <option>Producto 4</option> <option>Producto 5</option> <option>Producto 6</option> </optgroup> <optgroup label="Paso 1"> <option>Subpagina 1</option> <option>Subpagina 2</option> <option>Subpagina 3</option> </optgroup> </optgroup> <optgroup label="Paso 2"> <option>Subpagina 1</option> <option>Subpagina 2</option> <option>Subpagina 3</option> </optgroup> </optgroup> <optgroup label="Paso 3"> <option>Subpagina 1</option> <option>Subpagina 2</option> <option>Subpagina 3</option> </optgroup> </select>
Here is the code that displays all of posts that I want but without order. I figure out that I have to use the id of the custom post type but I do not how to, any idea?
Note: I`ll like to save more than one post at the same time.
// Add the Meta Box
function add_custom_meta_box_related() {
add_meta_box(
'custom_meta_box_related', // $id
'Related Information', // $title
'show_custom_meta_box_related', // $callback
'related', // $page
'normal', // $context
'high'); // $priority
}
add_action('add_meta_boxes', 'add_custom_meta_box_related');
// Field Array
$prefix_related = 'custom_';
$custom_meta_fields_related = array(
array(
'label' => 'Related Items',
'desc' => 'Select a related item(s)',
'id' => $prefix_materiales.'post_id',
'type' => 'post_list',
'post_type' => array('products','paso1','paso2','paso3','paso4','compra'),
)
);
// The Callback
function show_custom_meta_box_related() {
global $custom_meta_fields_related, $post;
// Use nonce for verification
echo '<input type="hidden" name="custom_meta_box_nonce" value="'.wp_create_nonce(basename(__FILE__)).'" />';
// Begin the field table and loop
echo '<table class="form-table">';
foreach ($custom_meta_fields_related as $field_related) {
// get value of this field if it exists for this post
$meta_related = get_post_meta($post->ID, $field_related['id'], true);
// begin a table row with
echo '<tr>
<th><label for="'.$field_related['id'].'">'.$field_related['label'].'</label></th>
<td>';
switch($field_related['type']) {
// case items will go here
// post_list
case 'post_list':
$items = get_posts( array (
'post_type' => $field_related['post_type'],
'posts_per_page' => -1
));
echo '<select multiple name="'.$field_related['id'].'" id="'.$field_related['id'].'">
<option value="">Select One or more</option>'; // Select One
foreach($items as $item) {
echo '<option value="'.$item->ID.'"',$meta_related == $item->ID ? ' selected="selected"' : '','> '.$item->post_title.'</option>';
} // end foreach
echo '</select><br /><span class="description">'.$field_related['desc'].'</span>';
break;
} //end switch
echo '</td></tr>';
} // end foreach
echo '</table>'; // end table
}
// Save the Data
function save_custom_meta_related($post_id) {
global $custom_meta_fields_related;
// verify nonce
if (!wp_verify_nonce($_POST['custom_meta_box_nonce'], basename(__FILE__)))
return $post_id;
// check autosave
if (defined('DOING_AUTOSAVE') && DOING_AUTOSAVE)
return $post_id;
// check permissions
if ('page' == $_POST['post_type']) {
if (!current_user_can('edit_page', $post_id))
return $post_id;
} elseif (!current_user_can('edit_post', $post_id)) {
return $post_id;
}
// loop through fields and save the data
foreach ($custom_meta_fields_related as $field_related) {
$old = get_post_meta($post_id, $field_related['id'], true);
$new = $_POST[$field_related['id']];
if ($new && $new != $old) {
update_post_meta($post_id, $field_related['id'], $new);
} elseif ('' == $new && $old) {
delete_post_meta($post_id, $field_related['id'], $old);
}
} // end foreach
}
add_action('save_post', 'save_custom_meta_related');
Thanks in advance
