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<title>[54634] trunk: Query: Remove placeholder from query cache key.</title>
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<dt style="float: left; width: 6em; font-weight: bold">Revision</dt> <dd><a style="font-weight: bold" href="https://core.trac.wordpress.org/changeset/54634">54634</a><script type="application/ld+json">{"@context":"http://schema.org","@type":"EmailMessage","description":"Review this Commit","action":{"@type":"ViewAction","url":"https://core.trac.wordpress.org/changeset/54634","name":"Review Commit"}}</script></dd>
<dt style="float: left; width: 6em; font-weight: bold">Author</dt> <dd>spacedmonkey</dd>
<dt style="float: left; width: 6em; font-weight: bold">Date</dt> <dd>2022-10-18 15:06:48 +0000 (Tue, 18 Oct 2022)</dd>
</dl>
<pre style='padding-left: 1em; margin: 2em 0; border-left: 2px solid #ccc; line-height: 1.25; font-size: 105%; font-family: sans-serif'>Query: Remove placeholder from query cache key.
Remove escape placeholder from query cache key, as placeholders are a based on a unique id on every request. This means that it is impossible for a cache to be reused, making queries that use escape placeholders such as `LIKE` searches, unable to be cached.
Props dhl, spacedmonkey, peterwilsoncc, desrosj, chaion07, davidbaumwald, mukesh27.
Fixes <a href="https://core.trac.wordpress.org/ticket/56802">#56802</a>.</pre>
<h3>Modified Paths</h3>
<ul>
<li><a href="#trunksrcwpincludesclasswpqueryphp">trunk/src/wp-includes/class-wp-query.php</a></li>
<li><a href="#trunktestsphpunittestsquerycacheResultsphp">trunk/tests/phpunit/tests/query/cacheResults.php</a></li>
</ul>
</div>
<div id="patch">
<h3>Diff</h3>
<a id="trunksrcwpincludesclasswpqueryphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/src/wp-includes/class-wp-query.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-includes/class-wp-query.php 2022-10-18 14:45:27 UTC (rev 54633)
+++ trunk/src/wp-includes/class-wp-query.php 2022-10-18 15:06:48 UTC (rev 54634)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -3115,10 +3115,12 @@
</span><span class="cx" style="display: block; padding: 0 10px"> $cache_args['update_post_meta_cache'],
</span><span class="cx" style="display: block; padding: 0 10px"> $cache_args['update_post_term_cache'],
</span><span class="cx" style="display: block; padding: 0 10px"> $cache_args['lazy_load_term_meta'],
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- $cache_args['update_menu_item_cache']
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ $cache_args['update_menu_item_cache'],
+ $cache_args['search_orderby_title']
</ins><span class="cx" style="display: block; padding: 0 10px"> );
</span><span class="cx" style="display: block; padding: 0 10px">
</span><span class="cx" style="display: block; padding: 0 10px"> $new_request = str_replace( $fields, "{$wpdb->posts}.*", $this->request );
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ $new_request = $wpdb->remove_placeholder_escape( $new_request );
</ins><span class="cx" style="display: block; padding: 0 10px"> $key = md5( serialize( $cache_args ) . $new_request );
</span><span class="cx" style="display: block; padding: 0 10px">
</span><span class="cx" style="display: block; padding: 0 10px"> $last_changed = wp_cache_get_last_changed( 'posts' );
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -3126,7 +3128,20 @@
</span><span class="cx" style="display: block; padding: 0 10px"> $last_changed .= wp_cache_get_last_changed( 'terms' );
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px">
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- $cache_key = "wp_query:$key:$last_changed";
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ $cache_key = "wp_query:$key:$last_changed";
+
+ /**
+ * Filters query cache key.
+ *
+ * @since 6.1.0
+ *
+ * @param string $cache_key Cache key.
+ * @param array $cache_args Query args used to generate the cache key.
+ * @param string $new_request SQL Query.
+ * @param WP_Query $query The WP_Query instance.
+ */
+ $cache_key = apply_filters( 'wp_query_cache_key', $cache_key, $cache_args, $new_request, $this );
+
</ins><span class="cx" style="display: block; padding: 0 10px"> $cache_found = false;
</span><span class="cx" style="display: block; padding: 0 10px"> if ( null === $this->posts ) {
</span><span class="cx" style="display: block; padding: 0 10px"> $cached_results = wp_cache_get( $cache_key, 'posts', false, $cache_found );
</span></span></pre></div>
<a id="trunktestsphpunittestsquerycacheResultsphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/tests/phpunit/tests/query/cacheResults.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/tests/phpunit/tests/query/cacheResults.php 2022-10-18 14:45:27 UTC (rev 54633)
+++ trunk/tests/phpunit/tests/query/cacheResults.php 2022-10-18 15:06:48 UTC (rev 54634)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -33,6 +33,16 @@
</span><span class="cx" style="display: block; padding: 0 10px"> */
</span><span class="cx" style="display: block; padding: 0 10px"> public static $author_id;
</span><span class="cx" style="display: block; padding: 0 10px">
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ /**
+ * @var array
+ */
+ protected $cache_args;
+
+ /**
+ * @var string
+ */
+ protected $new_request;
+
</ins><span class="cx" style="display: block; padding: 0 10px"> public static function wpSetUpBeforeClass( WP_UnitTest_Factory $factory ) {
</span><span class="cx" style="display: block; padding: 0 10px"> // Make some post objects.
</span><span class="cx" style="display: block; padding: 0 10px"> self::$posts = $factory->post->create_many( 5 );
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -57,14 +67,28 @@
</span><span class="cx" style="display: block; padding: 0 10px"> );
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px">
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ function set_up() {
+ parent::set_up();
+ $this->cache_args = null;
+ $this->new_request = null;
+ add_filter( 'wp_query_cache_key', array( $this, 'filter_wp_query_cache_key' ), 15, 3 );
+ }
+
</ins><span class="cx" style="display: block; padding: 0 10px"> /**
</span><span class="cx" style="display: block; padding: 0 10px"> * @dataProvider data_query_cache
</span><span class="cx" style="display: block; padding: 0 10px"> * @ticket 22176
</span><span class="cx" style="display: block; padding: 0 10px"> */
</span><span class="cx" style="display: block; padding: 0 10px"> public function test_query_cache( $args ) {
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ global $wpdb;
+
</ins><span class="cx" style="display: block; padding: 0 10px"> $query1 = new WP_Query();
</span><span class="cx" style="display: block; padding: 0 10px"> $posts1 = $query1->query( $args );
</span><span class="cx" style="display: block; padding: 0 10px">
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ $placeholder = $wpdb->placeholder_escape();
+ $this->assertNotEmpty( $this->new_request, 'Check new request is not empty' );
+ $this->assertStringNotContainsString( $placeholder, $this->new_request, 'Check if request does not contain placeholder' );
+ $this->assertStringNotContainsString( $placeholder, wp_json_encode( $this->cache_args ), 'Check if cache arrays does not contain placeholder' );
+
</ins><span class="cx" style="display: block; padding: 0 10px"> $queries_before = get_num_queries();
</span><span class="cx" style="display: block; padding: 0 10px"> $query2 = new WP_Query();
</span><span class="cx" style="display: block; padding: 0 10px"> $posts2 = $query2->query( $args );
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -191,6 +215,30 @@
</span><span class="cx" style="display: block; padding: 0 10px"> ),
</span><span class="cx" style="display: block; padding: 0 10px"> ),
</span><span class="cx" style="display: block; padding: 0 10px"> ),
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ 'cache meta query search' => array(
+ 'args' => array(
+ 'cache_results' => true,
+ 'meta_query' => array(
+ array(
+ 'key' => 'color',
+ 'value' => '00',
+ 'compare' => 'LIKE',
+ ),
+ ),
+ ),
+ ),
+ 'cache meta query not search' => array(
+ 'args' => array(
+ 'cache_results' => true,
+ 'meta_query' => array(
+ array(
+ 'key' => 'color',
+ 'value' => 'ff',
+ 'compare' => 'NOT LIKE',
+ ),
+ ),
+ ),
+ ),
</ins><span class="cx" style="display: block; padding: 0 10px"> 'cache comment_count' => array(
</span><span class="cx" style="display: block; padding: 0 10px"> 'args' => array(
</span><span class="cx" style="display: block; padding: 0 10px"> 'cache_results' => true,
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -209,6 +257,18 @@
</span><span class="cx" style="display: block; padding: 0 10px"> ),
</span><span class="cx" style="display: block; padding: 0 10px"> ),
</span><span class="cx" style="display: block; padding: 0 10px"> ),
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ 'cache search query' => array(
+ 'args' => array(
+ 'cache_results' => true,
+ 's' => 'title',
+ ),
+ ),
+ 'cache search query multiple terms' => array(
+ 'args' => array(
+ 'cache_results' => true,
+ 's' => 'Post title',
+ ),
+ ),
</ins><span class="cx" style="display: block; padding: 0 10px"> );
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px">
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -827,6 +887,13 @@
</span><span class="cx" style="display: block; padding: 0 10px"> $this->assertNotSame( $query1->found_posts, $query2->found_posts );
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px">
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ public function filter_wp_query_cache_key( $cache_key, $cache_args, $new_request ) {
+ $this->cache_args = $cache_args;
+ $this->new_request = $new_request;
+
+ return $cache_key;
+ }
+
</ins><span class="cx" style="display: block; padding: 0 10px"> /**
</span><span class="cx" style="display: block; padding: 0 10px"> * @ticket 22176
</span><span class="cx" style="display: block; padding: 0 10px"> */
</span></span></pre>
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