I have a custom post type, and have created an archive template, archive-custom_post_type.php, which includes a search form.
I am then using pre_get_posts to add parameters to the query to filter my results.
However, to make sure this only happens on this archive page, I want to check a few things. First I am checking if the post type matches.
But then I wanted to check the is_search() parameter, only to see that it is false.
How and when is this defined? Can I do anything to let WP know that a search is happening?
pre_get_posts callback
$post_type = get_query_var( 'post_type' );
if ( $post_type === 'document' ) {
$params = $_POST;
if ( $params ) {
$query->set( 's', $params['keyword'] );
$query->set( 'order', $params['order'] );
$query->set( 'orderby', $params['order_by'] );
}
}
archive-document.php
<?php get_header(); ?>
<?php get_template_part( 'my-slug', 'document-filter' ); ?>
<div id="search-results">
<?php if ( have_posts() ) : while ( have_posts() ) : the_post(); ?>
<div>
<?php the_title(); ?>
</div>
<?php endwhile; else : ?>
<p>Sorry, no posts matched your criteria</p>
<?php endif; ?>
</div>
<?php get_footer(); ?>
document-filter.php
<form id="document-filter" method="post">
<select name="order_by">
<option value="date">Date</option>
<option value="title">Name</option>
</select>
<select name="order">
<option value="desc">DESC</option>
<option value="asc">ASC</option>
</select>
<input name="keyword" type="text" placeholder="Filter by keyword" value=""/>
<input type="submit" />
</form>
