Why is wordpress filter not working with wp_query()?

Question

WordPress

I was killed about the question of the filter in wordpress through wp_query ().

<?php 
    $args = array(
    'post_type' => 'sale',
          'key' => 'price',
          'value' => '200',
);
$query = new WP_Query( $args );
if ( $query->have_posts() ) {
  while ( $query->have_posts() ) {
    $query->the_post();
    echo '<li>' . get_the_title() . '</li>';
  }
} else {	// Постов не найдено }
wp_reset_postdata();
    ?>

This code outputs all records from an arbitrary "sale" type, but does not want to filter by key and value in any way. I tried other types and fields and values, the result is the same. What is the reason?

Answer 1

There are two formats for postmeta, you need to use one of them