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FutureMedia/example

Last active February 25, 2018 13:16
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Create predefined custom queries search using custom args using add_filter and pre_get_posts https://www.smashingmagazine.com/2016/03/advanced-wordpress-search-with-wp_query/
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example
You can search the site like this:
http://example.com/?type=apartment&area=athens
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form
function sm_setup() {
add_shortcode( 'sm_search_form', 'sm_search_form' );
}
add_action( 'init', 'sm_setup' );
function sm_search_form( $args ){
// our code here
}
// The Query
// meta_query expects nested arrays even if you only have one query
$sm_query = new WP_Query( array( 'post_type' => 'accommodation', 'posts_per_page' => '-1', 'meta_query' => array( array( 'key' => '_sm_accommodation_area' ) ) ) );
// The Loop
if ( $sm_query->have_posts() ) {
$areas = array();
while ( $sm_query->have_posts() ) {
$sm_query->the_post();
$area = get_post_meta( get_the_ID(), '_sm_accommodation_area', true );
// populate an array of all occurrences (non duplicated)
if( !in_array( $area, $areas ) ){
$areas[] = $area;
}
}
}
} else{
echo 'No accommodations yet!';
return;
}
/* Restore original Post Data */
wp_reset_postdata();
if( count($areas) == 0){
return;
}
asort($areas);
$select_area = '<select name="area" style="width: 100%">';
$select_area .= '<option value="" selected="selected">' . __( 'Select area', 'smashing_plugin' ) . '</option>';
foreach ($areas as $area ) {
$select_city .= '<option value="' . $city . '">' . $area . '</option>';
}
$select_area .= '</select>' . "\n";
reset($areas);
Raw
functions
/**
* Register custom query vars
*
* @link https://codex.wordpress.org/Plugin_API/Filter_Reference/query_vars
*/
function sm_register_query_vars( $vars ) {
$vars[] = 'type';
$vars[] = 'area';
return $vars;
}
add_filter( 'query_vars', 'sm_register_query_vars' );
/**
* Build a custom query based on several conditions
* The pre_get_posts action gives developers access to the $query object by reference
* any changes you make to $query are made directly to the original object - no return value is requested
*
* @link https://codex.wordpress.org/Plugin_API/Action_Reference/pre_get_posts
*
*/
function sm_pre_get_posts( $query ) {
// check if the user is requesting an admin page
// or current query is not the main query
if ( is_admin() || ! $query->is_main_query() ){
return;
}
// edit the query only when post type is 'accommodation'
// if it isn't, return
if ( !is_post_type_archive( 'accommodation' ) ){
return;
}
$meta_query = array();
// add meta_query elements
if( !empty( get_query_var( 'area' ) ) ){
$meta_query[] = array( 'key' => '_sm_accommodation_area', 'value' => get_query_var( 'area' ), 'compare' => 'LIKE' );
}
if( !empty( get_query_var( 'type' ) ) ){
$meta_query[] = array( 'key' => '_sm_accommodation_type', 'value' => get_query_var( 'type' ), 'compare' => 'LIKE' );
}
if( count( $meta_query ) > 1 ){
$meta_query['relation'] = 'AND';
}
if( count( $meta_query ) > 0 ){
$query->set( 'meta_query', $meta_query );
}
}
add_action( 'pre_get_posts', 'sm_pre_get_posts', 1 );
Raw
more
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