JetEngine. Register and process custom contexts.

custom-context.php

<?php
/**
 * Here we're regsitering our context to show in allowed context option
 */
add_filter( 'jet-engine/listings/allowed-context-list', function( $context_list ) {
	$context_list['_my_parent_object'] = 'Parent Property';
	$context_list['_my_child_object'] = 'Child Attraction';
	return $context_list;
} );

/**
 * Here we're propcessing cstom context '_my_parent_object' when it selected by user
 */
add_filter( 'jet-engine/listings/data/object-by-context/_my_parent_object', function() {

	$current_object = jet_engine()->listings->data->get_current_object();

	if ( ! isset( $current_object->parent_object_id ) ) {
		return false;
	}
	
	$object = get_post( $current_object->parent_object_id );
	$object->post_status = get_post_meta( $object->ID, 'prop_coordinates', true );
	
	return $object;

} );

/**
 * Here we're propcessing cstom context '_my_child_object' when it selected by user
 */
add_filter( 'jet-engine/listings/data/object-by-context/_my_child_object', function() {

	$current_object = jet_engine()->listings->data->get_current_object();

	if ( ! isset( $current_object->child_object_id ) ) {
		return false;
	}
	
	$object = get_post( $current_object->child_object_id );
	$object->post_status = get_post_meta( $object->ID, 'coordinates', true );
	
	return $object;

} );