Oh dear, I’m a dumb!
My problem was that the reference ID was wrong, so would never work. But not to be so ugly, I share my finding.
The code to create a form based on another is:
Front End
<?php
$customtype = get_field('page_customtype');
$idform = get_field('page_idform');
$args = array(
'post_id' => 'newpost_'.$customtype ,
'field_groups' => array( $idform ),
'return' => add_query_arg( 'updated', 'true', "#" ),
);
acf_form( $args );
?>
And the part that makes me proud is how to treat the data to insert without having to have the reference (KeyField) of each field:
functions.php
function my_pre_save_post( $post_id ) {
$customtype = explode('_' , $post_id );
$post = array(
'post_status' => 'Publish',
'post_type' => $customtype[1],
);
$post_id = wp_insert_post( $post );
while (list($key, $value) = each($_POST['acf'])) {
$var = $var . "Key: $key; Value: $value<br />\n";
$namefield = get_field_object($key);
add_post_meta ($post_id, $namefield['name'] , $value, true);
}
}
add_filter('acf/pre_save_post' , 'my_pre_save_post', 10, 1 );
Thus a job that took hours (depending on the number of forms) only takes a few minutes.
I hope I can help in any way
