Thanks John for your answer.
Sorry for the lack of information from my side.
Firstly in the hook filter acf/prepare_field, I change the field name:
add_filter( 'acf/prepare_field/name=MY_FIELD', function ( $field ) {
$field['name'] = 'acf[' . $field['key'] . '-clone]';
return $field;
}, 10, 1 );
Secondly to get the value saved in my hidden field (used to save the data as a JSON) I’m using the hook filter acf/load_value:
add_filter( 'acf/load_value/name=MY_FIELD', function ( $value, $post_id, $field ) {
$field = acf_get_field( $field['name'] );
$json = get_field( $field['name'] . '-json', $post_id );
// $data proccessed here
return $data;
}, 10, 3 );
Finally, I’m using the hook acf/save_post to update my JSON field:
add_filter( 'acf/save_post', function ( $post_id ) {
$field_name = 'MY_FIELD';
if ( $field_name ) {
$field = false;
foreach ( array_keys( $_POST['acf'] ) as $k ) {
if ( ! str_contains( $k, '-clone' ) ) {
continue;
}
$field = get_field_object( str_replace( '-clone', '', $k ), $post_id );
if ( $field['name'] === $field_name ) {
break;
}
}
if ( $field ) {
$data = $_POST['acf'][ $field['key'] . '-clone' ];
update_field( $field['name'] . '-json', json_encode( $data ), $post_id );
}
}
}, 10, 1 );
—
To give you more context, my repeater is in a custom post type. For each post I’ve this repeater field containing a list of 250 countries. For each country I need to have 12 fields to get specific data from them for this post.
