The following snippet shows how to filter recipients on any transfer form recipients autocomplete based on a specific meta value.
If you don’t know exactly the name of a meta key, you can use a plugin like JSM’s Show User Meta to see all stored user meta keys.
function my_prefix_filter_transfers_recipients_by_meta( $query_vars, $user_id, $search ) {
global $wpdb;
$meta_key = 'your_meta_key'; // Set the meta key you want to filter
$meta_value = 'Your meta value'; // Set the meta value you want to filter
$compare = '='; // Accepted values: =, !=, >, <, >=, <=
$query_vars['join'][] = "LEFT JOIN {$wpdb->usermeta} AS umeta ON ( umeta.user_id = u.ID )";
$query_vars['where'][] = "( umeta.meta_key = '{$meta_key}' AND umeta.meta_value {$compare} '{$meta_value}' )";
return $query_vars;
}
add_filter( 'gamipress_transfers_users_autocomplete_pre_query_vars', 'my_prefix_filter_transfers_recipients_by_meta', 10, 3 );