I’m not familiar with that plugin. Is this something you are using to set custom fields in the post? In which case the hidden field’s name should start with “meta_”. I think it should handle setting multiple values in the same field.
If I’m not understanding, please provide more context about ACF Repeater Fields.
I looked into this a bit further and it’s a bit more complicated than I originally thought. ACF has its own method of creating posts, and with Repeater Fields I found no other solution than to use ACF’s method.
$field_key = 'field_123123123123'; // corresponds with a meta_ field
$subfield_key = 'field_456456456456'; // repeating sub-field of $field_key
$post_id = $the_post_id; // gets the current post ID
$items = array('foo','bar','meh','cat','dog');
foreach ($items as $items_value) {
$value[] = array($subfield_key => $items_value);
update_field( $field_key, $value, $post_id );
}
The issue is that you when you use Repeater Fields, you can’t get a meta_ field by its name. You have to get it by its field key, which is generated by ACF when you create a custom field. Repeater sub-fields also have their own field keys.
Also, I couldn’t get this to work with update_post_meta, which FtP uses. I had to use update_field (which is native to ACF).
Sorry, I thought this would be an open-and-shut issue. I’ve posted a similar question on ACF’s forums – if they indicate a solution that allows FtP integration, I’ll share it here.
Thanks for writing back. Note that there are a couple of hook in F2P, form_to_post_before_create_post and form_to_post_set_values. Perhaps you can add code to those and call ACF functions to do what you want.
