Meta Box

Thanks for letting us know. Let me check and fix it.

Sorry, the docs is incorrect. The submitted post ID is added separately as the 2nd parameter of the hook. Please change the code to this:

add_action ('rwmb_frontend_after_process','emnsh_rwmb_frontend_after_process', 10, 2);
function emnsh_rwmb_frontend_after_process($config, $post_id) {
    if ($post_id') {
        $name = rwmb_meta('emnsh-name');
        wp_update_post(array(
            'ID' =>  $config['post_id'],
            'post_title'=>$name
        ));
    }
}

I also updated the docs.

This code:

$birra = isset( $passaggio['et2018-nome_birra'] ) ? $passaggio['et2018-nome_birra'] : '<a href="'.get_the_permalink().'" title="'.get_the_title().'"><p>Birra: '.$birra.'</p></a>';

is wrong and can't work.

This code:

if (isset($passaggio['et2018-nome_birra'])){
                    $birra = $passaggio['et2018-nome_birra'];
                }
echo '<a href="'.get_the_permalink().'" title="'.get_the_title().'"><p>Birra: '.$birra.'</p></a>';

works. But it will show a warning if there is no value for $passaggio['et2018-nome_birra']. And in case there's no value, it still show the <a> link.

Please try this instead:

$birra = isset($passaggio['et2018-nome_birra']) ? $passaggio['et2018-nome_birra'] : '';
if ($birra) {
    echo '<a href="'.get_the_permalink().'" title="'.get_the_title().'"><p>Birra: '.$birra.'</p></a>';
}

I think it's better to check like this:

$birra = isset( $passaggio['et2018-nome_birra'] ) ? $passaggio['et2018-nome_birra'] : '';

So the variable is always available and won't display any warning if you do echo $birra;.

PS: You can get the group value your way or use the helper function like this:

$passaggio = rwmb_meta( 'gruppo_birra' );

In your code, please make sure the global $post is available. Otherwise it won't work. You can try this instead:

$passaggio = get_post_meta( get_the_ID(), 'gruppo_birra', true );

Hi,

The filter:

$new = apply_filters( "rwmb_{$field['id']}_value", $new, $field, $old );

means that the value of the field ($new) will run through a filter called rwmb_YOURFIELDID_value. This filter has 3 params:

• $new: the submitted value of the field
• $field: field settings (array)
• $old: the current value of the field, which is stored in the custom field. If field is new, then it's an empty string.

So, to add a filter to change the field value, please run:

add_filter( 'rwmb_YOURFIELDID_value', function( $new, $field, $old ) {
    $new = 'Your new value';
    return $new;
}, 10, 3 );

Just add it to your functions.php file of your theme. That's all.

Hope that's clear 🙂

You can use rwmb_{$field_type}_value or rwmb_{$field_id}_value. Please see this docs.

Ooops, I was thinking you're using the taxonomy field from Meta Box. If you're using the WordPress's core meta box for post tag, then it's out of the scope of the plugin. Maybe you should open a ticket for WordPress team?

Hi Mark,

It's kind of impossible for group. Group saves value as an serialized array, that's unable to query by. If you really need to query by a field, please make it a standalone field, not in a group.