Relevanssi job search

relevanssi-custom-functions.php

// filter relevanssi based on job_region query

add_filter('relevanssi_modify_wp_query', 'region_tax_query');
function region_tax_query($query) {
	$tax_query = array();
	if (!empty($query->query_vars['job_region'])) {
		$tax_query[] = array(
			'taxonomy' => 'region',
			'field' => 'id',
			'terms' => $query->query_vars['job_region']
		);
	}
	if (!empty($tax_query)) {
		$tax_query['relation'] = 'AND'; // you can also use 'OR' here
		$query->set('tax_query', $tax_query);
	}
	return $query;
}

add_filter('relevanssi_search_ok', 'search_trigger');
function search_trigger($search_ok) {
	global $wp_query;
	if (!empty($wp_query->query_vars['job_region'])) {
		$search_ok = true;
	}
	return $search_ok;
}

add_action('relevanssi_hits_filter', 'allow_null_search');
function allow_null_search($hits) {
	global $wp_query;
	if(!empty($wp_query->query_vars['job_region'])) $region = $wp_query->query_vars['job_region'];
	if(!empty($wp_query->query_vars['post_type'])) $post_type = $wp_query->query_vars['post_type'];

	if ( $hits[0] == null ) {
		// no search hits, so must create new
		$args = array(
			'post_type' => $post_type,
			'tax_query' => array(
				array(
					'taxonomy' => 'region',
					'field'    => 'term_id',
					'terms'    => array($region)
				)
			),
			'posts_per_page' => -1
		);
		$hits[0] = get_posts( $args );
	} else {
		// posts available, take only those that match the conditions
		$ok = array();
		foreach ( $hits[0] as $hit ) {
			if (is_singular($post_type) && has_term( $region, 'region' ) )
			array_push( $ok, $hit );
		}
		$hits[0] = $ok;
	}
	return $hits;
}

relevanssi-job-search.php

<?php
global $division_slug;
if($division_slug = 'personnel') $job_post_type = 'vgc_personnel_jobs';
elseif($division_slug = 'labour') $job_post_type = 'vgc_jobs';
?>
<div class="widget">

	<h3>Job search</h3>

	<form role="search" method="get" id="job-search-form" class="form-job-search" action="<?php echo home_url('/'); ?>">
		<div class="form-group">
			<label class="hide" for="job-search-input"><?php _e('Search for:', 'roots'); ?></label>
			<input type="text" value="<?php if (is_search()) { echo get_search_query(); } ?>" name="s" id="job-search-input" class="search-query form-control" placeholder="<?php _e('Search', 'roots'); ?> <?php bloginfo('name'); ?>">
		</div>

		<input type="hidden" name="post_type" value="<?php echo $job_post_type; ?>" />

		<?php
		wp_dropdown_categories(array('name' => 'job_region', 'taxonomy' => 'region', 'class' => 'form-control', 'show_option_all' => 'Search all regions'));
		?>

		<input type="submit" id="job-search-submit" class="btn btn-primary btn-block" value="<?php _e('Search our jobs', 'roots'); ?>" />

	</form>

</div>