Remove checked in tickets from Attendees list (RSVP & WooCommerce)

remove-checkedin-attendees.php

<?php 
function attendee_screen_filter_out_checked_in_attendees( $query ) {
	$attendee_post_types = array(
		'tribe_rsvp_attendees',
		'tribe_wooticket'
	);

	if ( ! in_array( $query->get( 'post_type' ), $attendee_post_types ) ) {
		return;
	}

	// Reform meta query - filter out those already checked in
	$meta_query = array(
		array(
			'key' => $query->get( 'meta_key' ),
			'value' => $query->get( 'meta_value' )
		),
		array(
			'key' => '_tribe_rsvp_checkedin',
			'compare' => 'NOT EXISTS'
		),
		array(
			'key' => '_tribe_wooticket_checkedin',
			'compare' => 'NOT EXISTS'
		)
	);

	// Clear out previous meta query
	$query->set( 'meta_key', '' );
	$query->set( 'meta_value', '' );

	// Update
	$query->set( 'meta_query', $meta_query );
}

function attendee_screen_remove_checked_in_attendees_setup() {
	add_action( 'pre_get_posts', 'attendee_screen_filter_out_checked_in_attendees', 200 );
}

function attendee_screen_remove_checked_in_attendees_teardown( $passthru ) {
	remove_action( 'pre_get_posts', 'attendee_screen_filter_out_checked_in_attendees', 200 );
	return $passthru;
}

add_action( 'tribe_tickets_attendees_page_inside', 'attendee_screen_remove_checked_in_attendees_setup' );
add_filter( 'tribe_tickets_event_attendees', 'attendee_screen_remove_checked_in_attendees_teardown' );