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<title>[30900] trunk: Remove caching for `get_term_by()` calls.</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/30900">30900</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/30900","name":"Review Commit"}}</script></dd>
<dt style="float: left; width: 6em; font-weight: bold">Author</dt> <dd>boonebgorges</dd>
<dt style="float: left; width: 6em; font-weight: bold">Date</dt> <dd>2014-12-16 13:26:19 +0000 (Tue, 16 Dec 2014)</dd>
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<pre style='padding-left: 1em; margin: 2em 0; border-left: 2px solid #ccc; line-height: 1.25; font-size: 105%; font-family: sans-serif'>Remove caching for `get_term_by()` calls.
The new cache group scheme causes term invalidation to be overly broad, so
that busting the cache for one term will bust the cache for all terms in the
taxonomy. We'll have another go at more focused use of the 'last_changed'
incrementor in a future release.
Reverts <a href="https://core.trac.wordpress.org/changeset/29915">[29915]</a>, <a href="https://core.trac.wordpress.org/changeset/30073">[30073]</a>, <a href="https://core.trac.wordpress.org/changeset/30080">[30080]</a>, <a href="https://core.trac.wordpress.org/changeset/30108">[30108]</a>, <a href="https://core.trac.wordpress.org/changeset/30112">[30112]</a>.
See <a href="https://core.trac.wordpress.org/ticket/21760">#21760</a>.</pre>
<h3>Modified Paths</h3>
<ul>
<li><a href="#trunksrcwpincludestaxonomyphp">trunk/src/wp-includes/taxonomy.php</a></li>
<li><a href="#trunktestsphpunitteststermcachephp">trunk/tests/phpunit/tests/term/cache.php</a></li>
</ul>
</div>
<div id="patch">
<h3>Diff</h3>
<a id="trunksrcwpincludestaxonomyphp"></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/taxonomy.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-includes/taxonomy.php 2014-12-16 13:24:38 UTC (rev 30899)
+++ trunk/src/wp-includes/taxonomy.php 2014-12-16 13:26:19 UTC (rev 30900)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -1305,24 +1305,19 @@
</span><span class="cx" style="display: block; padding: 0 10px"> return $error;
</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">- $incrementor = wp_cache_get( 'last_changed', 'terms' );
</del><span class="cx" style="display: block; padding: 0 10px"> if ( is_object($term) && empty($term->filter) ) {
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- wp_cache_add( $term->term_id, $term, $taxonomy . ':terms:' . $incrementor );
- wp_cache_add( $term->slug, $term->term_id, $taxonomy . ':slugs:' . $incrementor );
- wp_cache_add( $term->name, $term->term_id, $taxonomy . ':names:' . $incrementor );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ wp_cache_add( $term->term_id, $term, $taxonomy );
</ins><span class="cx" style="display: block; padding: 0 10px"> $_term = $term;
</span><span class="cx" style="display: block; padding: 0 10px"> } else {
</span><span class="cx" style="display: block; padding: 0 10px"> if ( is_object($term) )
</span><span class="cx" style="display: block; padding: 0 10px"> $term = $term->term_id;
</span><span class="cx" style="display: block; padding: 0 10px"> if ( !$term = (int) $term )
</span><span class="cx" style="display: block; padding: 0 10px"> return null;
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- if ( ! $_term = wp_cache_get( $term, $taxonomy . ':terms:' . $incrementor ) ) {
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ if ( ! $_term = wp_cache_get( $term, $taxonomy ) ) {
</ins><span class="cx" style="display: block; padding: 0 10px"> $_term = $wpdb->get_row( $wpdb->prepare( "SELECT t.*, tt.* FROM $wpdb->terms AS t INNER JOIN $wpdb->term_taxonomy AS tt ON t.term_id = tt.term_id WHERE tt.taxonomy = %s AND t.term_id = %d LIMIT 1", $taxonomy, $term) );
</span><span class="cx" style="display: block; padding: 0 10px"> if ( ! $_term )
</span><span class="cx" style="display: block; padding: 0 10px"> return null;
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- wp_cache_add( $term, $_term, $taxonomy . ':terms:' . $incrementor );
- wp_cache_add( $_term->slug, $term, $taxonomy . ':slugs:' . $incrementor );
- wp_cache_add( $_term->name, $term, $taxonomy . ':names:' . $incrementor );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ wp_cache_add( $term, $_term, $taxonomy );
</ins><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px">
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -1393,47 +1388,31 @@
</span><span class="cx" style="display: block; padding: 0 10px"> if ( ! taxonomy_exists($taxonomy) )
</span><span class="cx" style="display: block; padding: 0 10px"> return false;
</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 = false;
- $incrementor = wp_cache_get( 'last_changed', 'terms' );
</del><span class="cx" style="display: block; padding: 0 10px"> if ( 'slug' == $field ) {
</span><span class="cx" style="display: block; padding: 0 10px"> $field = 't.slug';
</span><span class="cx" style="display: block; padding: 0 10px"> $value = sanitize_title($value);
</span><span class="cx" style="display: block; padding: 0 10px"> if ( empty($value) )
</span><span class="cx" style="display: block; padding: 0 10px"> return false;
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-
- $term_id = wp_cache_get( $value, $taxonomy . ':slugs:' . $incrementor );
- if ( $term_id ) {
- $value = $term_id;
- $cache = true;
- }
</del><span class="cx" style="display: block; padding: 0 10px"> } else if ( 'name' == $field ) {
</span><span class="cx" style="display: block; padding: 0 10px"> // Assume already escaped
</span><span class="cx" style="display: block; padding: 0 10px"> $value = wp_unslash($value);
</span><span class="cx" style="display: block; padding: 0 10px"> $field = 't.name';
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- $term_id = wp_cache_get( $value, $taxonomy . ':names:' . $incrementor );
- if ( $term_id ) {
- $value = $term_id;
- $cache = true;
- }
</del><span class="cx" style="display: block; padding: 0 10px"> } else if ( 'term_taxonomy_id' == $field ) {
</span><span class="cx" style="display: block; padding: 0 10px"> $value = (int) $value;
</span><span class="cx" style="display: block; padding: 0 10px"> $field = 'tt.term_taxonomy_id';
</span><span class="cx" style="display: block; padding: 0 10px"> } else {
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- $cache = true;
- }
-
- if ( $cache ) {
- $term = get_term( (int) $value, $taxonomy, $output, $filter);
- if ( is_wp_error( $term ) ) {
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ $term = get_term( (int) $value, $taxonomy, $output, $filter );
+ if ( is_wp_error( $term ) )
</ins><span class="cx" style="display: block; padding: 0 10px"> $term = false;
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- }
- } else {
- $term = $wpdb->get_row( $wpdb->prepare( "SELECT t.*, tt.* FROM $wpdb->terms AS t INNER JOIN $wpdb->term_taxonomy AS tt ON t.term_id = tt.term_id WHERE tt.taxonomy = %s AND $field = %s LIMIT 1", $taxonomy, $value) );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ return $term;
</ins><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px">
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- if ( !$term )
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ $term = $wpdb->get_row( $wpdb->prepare( "SELECT t.*, tt.* FROM $wpdb->terms AS t INNER JOIN $wpdb->term_taxonomy AS tt ON t.term_id = tt.term_id WHERE tt.taxonomy = %s AND $field = %s LIMIT 1", $taxonomy, $value ) );
+ if ( ! $term )
</ins><span class="cx" style="display: block; padding: 0 10px"> return false;
</span><span class="cx" style="display: block; padding: 0 10px">
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ wp_cache_add( $term->term_id, $term, $taxonomy );
+
</ins><span class="cx" style="display: block; padding: 0 10px"> /** This filter is documented in wp-includes/taxonomy.php */
</span><span class="cx" style="display: block; padding: 0 10px"> $term = apply_filters( 'get_term', $term, $taxonomy );
</span><span class="cx" style="display: block; padding: 0 10px">
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -1442,10 +1421,6 @@
</span><span class="cx" style="display: block; padding: 0 10px">
</span><span class="cx" style="display: block; padding: 0 10px"> $term = sanitize_term($term, $taxonomy, $filter);
</span><span class="cx" style="display: block; padding: 0 10px">
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- wp_cache_add( $term->term_id, $term, $taxonomy . ':terms:' . $incrementor );
- wp_cache_add( $term->slug, $term->term_id, $taxonomy . ':slugs:' . $incrementor );
- wp_cache_add( $term->name, $term->term_id, $taxonomy . ':names:' . $incrementor );
-
</del><span class="cx" style="display: block; padding: 0 10px"> if ( $output == OBJECT ) {
</span><span class="cx" style="display: block; padding: 0 10px"> return $term;
</span><span class="cx" style="display: block; padding: 0 10px"> } elseif ( $output == ARRAY_A ) {
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -3649,12 +3624,8 @@
</span><span class="cx" style="display: block; padding: 0 10px"> * @param bool $clean_taxonomy Whether to clean taxonomy wide caches (true), or just individual term object caches (false). Default is true.
</span><span class="cx" style="display: block; padding: 0 10px"> */
</span><span class="cx" style="display: block; padding: 0 10px"> function clean_term_cache($ids, $taxonomy = '', $clean_taxonomy = true) {
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- global $_wp_suspend_cache_invalidation, $wpdb;
</del><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">
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- if ( ! empty( $_wp_suspend_cache_invalidation ) ) {
- return;
- }
-
</del><span class="cx" style="display: block; padding: 0 10px"> if ( !is_array($ids) )
</span><span class="cx" style="display: block; padding: 0 10px"> $ids = array($ids);
</span><span class="cx" style="display: block; padding: 0 10px">
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -3792,22 +3763,12 @@
</span><span class="cx" style="display: block; padding: 0 10px"> * @param string $taxonomy Optional. Update Term to this taxonomy in cache
</span><span class="cx" style="display: block; padding: 0 10px"> */
</span><span class="cx" style="display: block; padding: 0 10px"> function update_term_cache($terms, $taxonomy = '') {
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- global $_wp_suspend_cache_invalidation;
-
- if ( ! empty( $_wp_suspend_cache_invalidation ) ) {
- return;
- }
-
</del><span class="cx" style="display: block; padding: 0 10px"> foreach ( (array) $terms as $term ) {
</span><span class="cx" style="display: block; padding: 0 10px"> $term_taxonomy = $taxonomy;
</span><span class="cx" style="display: block; padding: 0 10px"> if ( empty($term_taxonomy) )
</span><span class="cx" style="display: block; padding: 0 10px"> $term_taxonomy = $term->taxonomy;
</span><span class="cx" style="display: block; padding: 0 10px">
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- $incrementor = wp_cache_set( 'last_changed', microtime(), 'terms' );
-
- wp_cache_add( $term->term_id, $term, $term_taxonomy . ':terms:' . $incrementor );
- wp_cache_add( $term->slug, $term->term_id, $taxonomy . ':slugs:' . $incrementor );
- wp_cache_add( $term->name, $term->term_id, $taxonomy . ':names:' . $incrementor );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ wp_cache_add( $term->term_id, $term, $term_taxonomy );
</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></pre></div>
<a id="trunktestsphpunitteststermcachephp"></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/term/cache.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/tests/phpunit/tests/term/cache.php 2014-12-16 13:24:38 UTC (rev 30899)
+++ trunk/tests/phpunit/tests/term/cache.php 2014-12-16 13:26:19 UTC (rev 30900)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -93,122 +93,4 @@
</span><span class="cx" style="display: block; padding: 0 10px">
</span><span class="cx" style="display: block; padding: 0 10px"> _unregister_taxonomy( $tax );
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-
- /**
- * @ticket 21760
- */
- function test_get_term_by_slug_cache() {
- global $wpdb;
- $term_id = $this->factory->term->create( array( 'slug' => 'burrito', 'taxonomy' => 'post_tag' ) );
-
- $queries = $wpdb->num_queries;
- get_term_by( 'slug', 'burrito', 'post_tag' );
- $initial = $queries + 1;
- $this->assertEquals( $initial, $wpdb->num_queries );
- $term = get_term_by( 'slug', 'burrito', 'post_tag' );
- $this->assertEquals( $initial, $wpdb->num_queries );
-
- $this->assertEquals( $term, wp_cache_get( $term_id, 'post_tag:terms:' . wp_cache_get( 'last_changed', 'terms' ) ) );
-
- $this->assertEquals( get_term( $term_id, 'post_tag' ), $term );
- $this->assertEquals( $initial, $wpdb->num_queries );
- }
-
- /**
- * @ticket 21760
- */
- function test_get_term_by_slug_cache_update() {
- global $wpdb;
- $term_id = $this->factory->term->create( array( 'slug' => 'burrito', 'taxonomy' => 'post_tag' ) );
-
- $queries = $wpdb->num_queries;
- get_term_by( 'slug', 'burrito', 'post_tag' );
- $initial = $queries + 1;
- $this->assertEquals( $initial, $wpdb->num_queries );
- $term = get_term_by( 'slug', 'burrito', 'post_tag' );
- $this->assertEquals( $initial, $wpdb->num_queries );
-
- $this->assertEquals( $term, wp_cache_get( $term_id, 'post_tag:terms:' . wp_cache_get( 'last_changed', 'terms' ) ) );
-
- wp_update_term( $term_id, 'post_tag', array( 'name' => 'Taco' ) );
- $this->assertNotEquals( $term, get_term( $term_id, 'post_tag' ) );
- $after_queries = $wpdb->num_queries;
- get_term_by( 'slug', 'burrito', 'post_tag' );
- $this->assertEquals( $after_queries, $wpdb->num_queries );
- }
-
- /**
- * @ticket 21760
- */
- function test_get_term_by_name_cache() {
- global $wpdb;
- $term_id = $this->factory->term->create( array( 'name' => 'burrito', 'taxonomy' => 'post_tag' ) );
-
- $queries = $wpdb->num_queries;
- get_term_by( 'name', 'burrito', 'post_tag' );
- $initial = $queries + 1;
- $this->assertEquals( $initial, $wpdb->num_queries );
- $term = get_term_by( 'name', 'burrito', 'post_tag' );
- $this->assertEquals( $initial, $wpdb->num_queries );
-
- $this->assertEquals( get_term( $term_id, 'post_tag' ), $term );
- $this->assertEquals( $initial, $wpdb->num_queries );
- }
-
- /**
- * @ticket 21760
- */
- function test_get_term_by_name_cache_update() {
- global $wpdb;
- $term_id = $this->factory->term->create( array( 'name' => 'burrito', 'taxonomy' => 'post_tag' ) );
-
- $queries = $wpdb->num_queries;
- get_term_by( 'name', 'burrito', 'post_tag' );
- $initial = $queries + 1;
- $this->assertEquals( $initial, $wpdb->num_queries );
- $term = get_term_by( 'name', 'burrito', 'post_tag' );
- $this->assertEquals( $initial, $wpdb->num_queries );
-
- wp_update_term( $term_id, 'post_tag', array( 'slug' => 'Taco' ) );
- $this->assertNotEquals( $term, get_term( $term_id, 'post_tag' ) );
- $after_queries = $wpdb->num_queries;
- get_term_by( 'name', 'burrito', 'post_tag' );
- $this->assertEquals( $after_queries, $wpdb->num_queries );
- }
-
- /**
- * @ticket 21760
- */
- function test_invalidating_term_caches_should_fail_when_invalidation_is_suspended() {
- $slug = 'taco';
- $name = 'Taco';
- $taxonomy = 'post_tag';
- $cache_key_slug = $slug;
- $cache_key_name = $name;
-
- $term_id = $this->factory->term->create( array( 'slug' => $slug, 'name' => $name, 'taxonomy' => $taxonomy ) );
-
- $last_changed = wp_cache_get( 'last_changed', 'terms' );
-
- $term = get_term_by( 'slug', $slug, $taxonomy );
-
- // Verify the term is cached by ID, slug and name
- $this->assertEquals( $term, wp_cache_get( $term_id, $taxonomy . ':terms:' . wp_cache_get( 'last_changed', 'terms' ) ) );
- $this->assertSame( $term_id, wp_cache_get( $cache_key_slug, $taxonomy . ':slugs:' . wp_cache_get( 'last_changed', 'terms' ) ) );
- $this->assertSame( $term_id, wp_cache_get( $cache_key_name, $taxonomy . ':names:' . wp_cache_get( 'last_changed', 'terms' ) ) );
-
- $suspend = wp_suspend_cache_invalidation();
- clean_term_cache( $term_id, $taxonomy );
-
- // Verify that the cached value still matches the correct value
- $this->assertEquals( $term, wp_cache_get( $term_id, $taxonomy . ':terms:' . wp_cache_get( 'last_changed', 'terms' ) ) );
- $this->assertSame( $term_id, wp_cache_get( $cache_key_slug, $taxonomy . ':slugs:' . wp_cache_get( 'last_changed', 'terms' ) ) );
- $this->assertSame( $term_id, wp_cache_get( $cache_key_name, $taxonomy . ':names:' . wp_cache_get( 'last_changed', 'terms' ) ) );
-
- // Verify that last changed has not been updated as part of an invalidation routine
- $this->assertSame( $last_changed, wp_cache_get( 'last_changed', 'terms' ) );
-
- // Clean up.
- wp_suspend_cache_invalidation( $suspend );
- }
</del><span class="cx" style="display: block; padding: 0 10px"> }
</span></span></pre>
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