how to see post id variable ($post_id) in my site?
where do I put these scripts?
add_filter('acf/load_field/name=hidden_post_id', 'make_hidden_post_id_readonly');
function make_field_readonly($field) {
// sets readonly attribute for field
$field['readonly'] = 1;
return field;
}
add_filter('acf/load_value/name=hidden_post_id', 'set_hidden_post_id_value'), 10, 3);
function set_hidden_post_id_value($value, $post_id, $field) {
// set the value of the field to the current post id
return $post_id;
}
add_action('admin_head', 'hide_hidden_post_id');
function hide_hidden_post_id() {
?>
<style type="text/css">
/* the field key for the post id field */
div[data-key="field_566aa87938bba"] {
display: none;
}
</style>
<?php
}
add_filter('acf/validate_value/name=book_number', require_unique', 10, 4);
function require_unique($valid, $value, $field, $input) {
if (!$valid) {
return $valid;
}
// get the post id
// using field key of post id field
$post_id = $_POST['acf']['field_566aa87938bba'];
// query existing posts for matching value
$args = array(
'post_type' => 'post',
'posts_per_page' = 1, // only need to see if there is 1
'post_status' => 'publish, draft, trash',
// don't include the current post
'post__not_in' => array($post_id),
'meta_query' => array(
array(
'key' => $field['book_number'],
'value' => $value
)
)
);
$query = new WP_Query($args);
if (count($query->posts)){
$valid = 'This Value is not Unique';
}
return $valid;
}
