Did you ever figure this out?

The 0 key is where the ID is stored.
Update this:
$meal_chef_image = wp_get_attachment_image_src($meal_chef[‘chef_image’], ‘medium’);

To this (add [0]):
$meal_chef_image = wp_get_attachment_image_src($meal_chef[‘chef_image’][0], ‘medium’);

it’s always a good idea to output your data arrays so you can verify.

@bevislw– Welcome to the Piklist Community!

Here are a few options:
1. Many developers choose to save the data normally and then convert it to uppercase on output. For that you can use the PHP function strtoupper: https://www.w3schools.com/php/func_string_strtoupper.asp

2. To Validate I would recommend using a callback function with strtoupper. Something like this should work:

function my_check_uppercase($index, $value, $options, $field, $fields) {
    return $value === strtoupper($value) ? true : 'contains lowercase letters.';
 }

Using the callback is documented here: https://piklist.github.io/docs/actions-filters/filters/piklist_validation_rules/

3. If you want to convert the data on save you should use a Sanitization rule. Validation rules are true/false, where Sanitization rules can change your data. You can also use the strtoupper function to convert your data. Here are docs on Sanitization rules: https://piklist.github.io/docs/actions-filters/filters/piklist_sanitization_rules/

Let me know if any of these worked for you.

It looks like you are trying to load content.html, which won’t work. Shortcodes need to be in PHP files.

You may want to try the “Dynamic Bootstrap Modal with External URL” solution here: https://www.codexworld.com/bootstrap-modal-dynamic-content-jquery-ajax-php-mysql/

With something like <a href="javascript:void(0);" data-href="content.html?id=1" class="openPopup">About Us</a>, and id is the ID of the post you want to edit.

Absolutely! I’m not sure how you want to pass the data to your modal, but for example if you didn’t have a modal:

1. Create the links your user would click on like this, where the post_id is the id of the post to edit: https://mydomain.com/edit/?id=5
2. In your Piklist form code you can add this before your field code: $post_id = isset($_GET['id']) ? $_GET['id'] : null;. This would grab the query parameter.
3. Then pass it to the Piklist field

piklist('field', array(
    'type' => 'text'
    ,'scope' => 'post'
    ,'field' => 'post_title'
    ,'label' => 'Post Title'
    ,'required' => true
    ,'object_id' => $post_id
  ));

Again, you will need to figure out how to do something similar with JS for the modal.

Does that make sense?

What exactly are you trying to do?

If you have the time, feel free to leave a review on WordPress.org. It really helps the project. Thanks!

Ah… The reason the metabox wasn’t showing up is because you have this Piklist parameter set ,'hide_meta_box' => true, which hides the meta box: https://piklist.github.io/docs/actions-filters/filters/piklist_taxonomies/#hide_meta_box