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<title>[36485] trunk: Allow `get_terms()` results to ordered by metadata.</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/36485">36485</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/36485","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>2016-02-06 04:41:26 +0000 (Sat, 06 Feb 2016)</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'>Allow `get_terms()` results to ordered by metadata.
The `$orderby` parameter of `get_terms()` now accepts the following values,
related to term meta:
* 'meta_value'
* 'meta_value_num'
* the value of the `$meta_key` parameter
* any key from the `$meta_query` array
This brings order-by-meta support for terms in line with post, comment, and
user queries.
As a byproduct of these improvements, `$meta_key` and `$meta_value` parameters
have been introduced to `get_terms()`. They interact with `$meta_query` in the
same way as in `WP_Query` and other query classes.
Props jadpm, eherman24.
Fixes <a href="https://core.trac.wordpress.org/ticket/34996">#34996</a>.</pre>
<h3>Modified Paths</h3>
<ul>
<li><a href="#trunksrcwpincludestaxonomyphp">trunk/src/wp-includes/taxonomy.php</a></li>
<li><a href="#trunktestsphpunitteststermgetTermsphp">trunk/tests/phpunit/tests/term/getTerms.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 2016-02-06 03:57:33 UTC (rev 36484)
+++ trunk/src/wp-includes/taxonomy.php 2016-02-06 04:41:26 UTC (rev 36485)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -1060,6 +1060,7 @@
</span><span class="cx" style="display: block; padding: 0 10px"> * @since 4.4.0 Introduced the ability to pass 'term_id' as an alias of 'id' for the `orderby` parameter.
</span><span class="cx" style="display: block; padding: 0 10px"> * Introduced the 'meta_query' and 'update_term_meta_cache' parameters. Converted to return
</span><span class="cx" style="display: block; padding: 0 10px"> * a list of WP_Term objects.
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ * @since 4.5.0 Introduced 'meta_key' and 'meta_value' parameters. Introduced the ability to order results by metadata.
</ins><span class="cx" style="display: block; padding: 0 10px"> *
</span><span class="cx" style="display: block; padding: 0 10px"> * @global wpdb $wpdb WordPress database abstraction object.
</span><span class="cx" style="display: block; padding: 0 10px"> * @global array $wp_filter
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -1071,7 +1072,9 @@
</span><span class="cx" style="display: block; padding: 0 10px"> * @type string $orderby Field(s) to order terms by. Accepts term fields ('name', 'slug',
</span><span class="cx" style="display: block; padding: 0 10px"> * 'term_group', 'term_id', 'id', 'description'), 'count' for term
</span><span class="cx" style="display: block; padding: 0 10px"> * taxonomy count, 'include' to match the 'order' of the $include param,
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- * or 'none' to skip ORDER BY. Defaults to 'name'.
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ * 'meta_value', 'meta_value_num', the value of `$meta_key`, the array
+ * keys of `$meta_query`, or 'none' to omit the ORDER BY clause.
+ * Defaults to 'name'.
</ins><span class="cx" style="display: block; padding: 0 10px"> * @type string $order Whether to order terms in ascending or descending order.
</span><span class="cx" style="display: block; padding: 0 10px"> * Accepts 'ASC' (ascending) or 'DESC' (descending).
</span><span class="cx" style="display: block; padding: 0 10px"> * Default 'ASC'.
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -1119,6 +1122,10 @@
</span><span class="cx" style="display: block; padding: 0 10px"> * @type bool $update_term_meta_cache Whether to prime meta caches for matched terms. Default true.
</span><span class="cx" style="display: block; padding: 0 10px"> * @type array $meta_query Meta query clauses to limit retrieved terms by.
</span><span class="cx" style="display: block; padding: 0 10px"> * See `WP_Meta_Query`. Default empty.
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ * @type string $meta_key Limit terms to those matching a specific metadata key. Can be used in
+ * conjunction with `$meta_value`.
+ * @type string $meta_value Limit terms to those matching a specific metadata value. Usually used
+ * in conjunction with `$meta_key`.
</ins><span class="cx" style="display: block; padding: 0 10px"> * }
</span><span class="cx" style="display: block; padding: 0 10px"> * @return array|int|WP_Error List of WP_Term instances and their children. Will return WP_Error, if any of $taxonomies
</span><span class="cx" style="display: block; padding: 0 10px"> * do not exist.
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -1414,13 +1421,53 @@
</span><span class="cx" style="display: block; padding: 0 10px"> // Meta query support.
</span><span class="cx" style="display: block; padding: 0 10px"> $join = '';
</span><span class="cx" style="display: block; padding: 0 10px"> $distinct = '';
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- if ( ! empty( $args['meta_query'] ) ) {
- $mquery = new WP_Meta_Query( $args['meta_query'] );
- $mq_sql = $mquery->get_sql( 'term', 't', 'term_id' );
</del><span class="cx" style="display: block; padding: 0 10px">
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ $mquery = new WP_Meta_Query();
+ $mquery->parse_query_vars( $args );
+ $mq_sql = $mquery->get_sql( 'term', 't', 'term_id' );
+ $meta_clauses = $mquery->get_clauses();
+
+ if ( ! empty( $meta_clauses ) ) {
</ins><span class="cx" style="display: block; padding: 0 10px"> $join .= $mq_sql['join'];
</span><span class="cx" style="display: block; padding: 0 10px"> $where .= $mq_sql['where'];
</span><span class="cx" style="display: block; padding: 0 10px"> $distinct .= "DISTINCT";
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+
+ // 'orderby' support.
+ $allowed_keys = array();
+ $primary_meta_key = null;
+ $primary_meta_query = reset( $meta_clauses );
+ if ( ! empty( $primary_meta_query['key'] ) ) {
+ $primary_meta_key = $primary_meta_query['key'];
+ $allowed_keys[] = $primary_meta_key;
+ }
+ $allowed_keys[] = 'meta_value';
+ $allowed_keys[] = 'meta_value_num';
+ $allowed_keys = array_merge( $allowed_keys, array_keys( $meta_clauses ) );
+
+ if ( ! empty( $args['orderby'] ) && in_array( $args['orderby'], $allowed_keys ) ) {
+ switch( $args['orderby'] ) {
+ case $primary_meta_key:
+ case 'meta_value':
+ if ( ! empty( $primary_meta_query['type'] ) ) {
+ $orderby = "ORDER BY CAST({$primary_meta_query['alias']}.meta_value AS {$primary_meta_query['cast']})";
+ } else {
+ $orderby = "ORDER BY {$primary_meta_query['alias']}.meta_value";
+ }
+ break;
+
+ case 'meta_value_num':
+ $orderby = "ORDER BY {$primary_meta_query['alias']}.meta_value+0";
+ break;
+
+ default:
+ if ( array_key_exists( $args['orderby'], $meta_clauses ) ) {
+ // $orderby corresponds to a meta_query clause.
+ $meta_clause = $meta_clauses[ $args['orderby'] ];
+ $orderby = "ORDER BY CAST({$meta_clause['alias']}.meta_value AS {$meta_clause['cast']})";
+ }
+ break;
+ }
+ }
</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"> $selects = array();
</span></span></pre></div>
<a id="trunktestsphpunitteststermgetTermsphp"></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/getTerms.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/tests/phpunit/tests/term/getTerms.php 2016-02-06 03:57:33 UTC (rev 36484)
+++ trunk/tests/phpunit/tests/term/getTerms.php 2016-02-06 04:41:26 UTC (rev 36485)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -1233,6 +1233,337 @@
</span><span class="cx" style="display: block; padding: 0 10px"> $this->assertEquals( array( $t1, $t2, $t3 ), $found );
</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">+ /**
+ * @ticket 34996
+ */
+ public function test_orderby_meta_value() {
+ register_taxonomy( 'wptests_tax', 'post' );
+ $terms = self::factory()->term->create_many( 3, array( 'taxonomy' => 'wptests_tax' ) );
+ add_term_meta( $terms[0], 'foo', 'zzz' );
+ add_term_meta( $terms[0], 'fee', 'ber' );
+ add_term_meta( $terms[1], 'foo', 'aaa' );
+ add_term_meta( $terms[1], 'fee', 'ber' );
+ add_term_meta( $terms[2], 'foo', 'jjj' );
+ add_term_meta( $terms[2], 'fee', 'ber' );
+
+ // Matches the first meta query clause.
+ $found = get_terms( 'wptests_tax', array(
+ 'hide_empty' => false,
+ 'meta_query' => array(
+ 'relation' => 'AND',
+ array(
+ 'key' => 'foo',
+ 'compare' => 'EXISTS',
+ ),
+ array(
+ 'key' => 'fee',
+ 'compare' => 'EXISTS',
+ ),
+ ),
+ 'orderby' => 'meta_value',
+ 'order' => 'ASC',
+ 'fields' => 'ids',
+ ) );
+
+ $this->assertEqualSets( array( $terms[1], $terms[2], $terms[0] ), $found );
+ }
+
+ /**
+ * @ticket 34996
+ */
+ public function test_orderby_meta_value_num() {
+ register_taxonomy( 'wptests_tax', 'post' );
+ $terms = self::factory()->term->create_many( 3, array( 'taxonomy' => 'wptests_tax' ) );
+ add_term_meta( $terms[0], 'foo', '999' );
+ add_term_meta( $terms[0], 'fee', 'ber' );
+ add_term_meta( $terms[1], 'foo', '111' );
+ add_term_meta( $terms[1], 'fee', 'ber' );
+ add_term_meta( $terms[2], 'foo', '555' );
+ add_term_meta( $terms[2], 'fee', 'ber' );
+
+ // Matches the first meta query clause.
+ $found = get_terms( 'wptests_tax', array(
+ 'hide_empty' => false,
+ 'meta_query' => array(
+ 'relation' => 'AND',
+ array(
+ 'key' => 'foo',
+ 'compare' => 'EXISTS',
+ ),
+ array(
+ 'key' => 'fee',
+ 'compare' => 'EXISTS',
+ ),
+ ),
+ 'orderby' => 'meta_value_num',
+ 'order' => 'ASC',
+ 'fields' => 'ids',
+ ) );
+
+ $this->assertEqualSets( array( $terms[1], $terms[2], $terms[0] ), $found );
+ }
+
+ /**
+ * @ticket 34996
+ */
+ public function test_orderby_meta_value_with_meta_key() {
+ register_taxonomy( 'wptests_tax', 'post' );
+ $terms = self::factory()->term->create_many( 3, array( 'taxonomy' => 'wptests_tax' ) );
+ add_term_meta( $terms[0], 'foo', 'bar' );
+ add_term_meta( $terms[0], 'fee', 'zzz' );
+ add_term_meta( $terms[0], 'faa', 'jjj' );
+ add_term_meta( $terms[1], 'foo', 'bar' );
+ add_term_meta( $terms[1], 'fee', 'aaa' );
+ add_term_meta( $terms[1], 'faa', 'aaa' );
+ add_term_meta( $terms[2], 'foo', 'bar' );
+ add_term_meta( $terms[2], 'fee', 'jjj' );
+ add_term_meta( $terms[2], 'faa', 'zzz' );
+
+ $found = get_terms( 'wptests_tax', array(
+ 'hide_empty' => false,
+ 'meta_key' => 'fee',
+ 'orderby' => 'meta_value',
+ 'order' => 'ASC',
+ 'fields' => 'ids',
+ ) );
+
+ $this->assertEqualSets( array( $terms[1], $terms[2], $terms[0] ), $found );
+
+ $found = get_terms( 'wptests_tax', array(
+ 'hide_empty' => false,
+ 'meta_query' => array(
+ array(
+ 'key' => 'foo',
+ 'compare' => 'EXISTS',
+ ),
+ ),
+ 'meta_key' => 'fee',
+ 'orderby' => 'meta_value',
+ 'order' => 'ASC',
+ 'fields' => 'ids',
+ ) );
+
+ $this->assertEqualSets( array( $terms[1], $terms[2], $terms[0] ), $found );
+
+ // Matches the first meta query clause.
+ $found = get_terms( 'wptests_tax', array(
+ 'hide_empty' => false,
+ 'meta_query' => array(
+ 'relation' => 'AND',
+ array(
+ 'key' => 'foo',
+ 'compare' => 'EXISTS',
+ ),
+ array(
+ 'key' => 'fee',
+ 'compare' => 'EXISTS',
+ ),
+ ),
+ 'meta_key' => 'fee',
+ 'orderby' => 'meta_value',
+ 'order' => 'ASC',
+ 'fields' => 'ids',
+ ) );
+
+ $this->assertEqualSets( array( $terms[1], $terms[2], $terms[0] ), $found );
+
+ // Matches the meta query clause corresponding to the 'meta_key' param.
+ $found = get_terms( 'wptests_tax', array(
+ 'hide_empty' => false,
+ 'meta_query' => array(
+ 'relation' => 'AND',
+ array(
+ 'key' => 'foo',
+ 'compare' => 'EXISTS',
+ ),
+ array(
+ 'key' => 'fee',
+ 'compare' => 'EXISTS',
+ ),
+ ),
+ 'meta_key' => 'faa',
+ 'orderby' => 'meta_value',
+ 'order' => 'ASC',
+ 'fields' => 'ids',
+ ) );
+
+ $this->assertEqualSets( array( $terms[1], $terms[0], $terms[2] ), $found );
+ }
+
+ /**
+ * @ticket 34996
+ */
+ public function test_orderby_meta_value_num_with_meta_key() {
+ register_taxonomy( 'wptests_tax', 'post' );
+ $terms = self::factory()->term->create_many( 3, array( 'taxonomy' => 'wptests_tax' ) );
+ add_term_meta( $terms[0], 'foo', 'bar' );
+ add_term_meta( $terms[0], 'fee', '999' );
+ add_term_meta( $terms[0], 'faa', '555' );
+ add_term_meta( $terms[1], 'foo', 'bar' );
+ add_term_meta( $terms[1], 'fee', '111' );
+ add_term_meta( $terms[1], 'faa', '111' );
+ add_term_meta( $terms[2], 'foo', 'bar' );
+ add_term_meta( $terms[2], 'fee', '555' );
+ add_term_meta( $terms[2], 'faa', '999' );
+
+ $found = get_terms( 'wptests_tax', array(
+ 'hide_empty' => false,
+ 'meta_key' => 'fee',
+ 'orderby' => 'meta_value',
+ 'order' => 'ASC',
+ 'fields' => 'ids',
+ ) );
+
+ $this->assertEqualSets( array( $terms[1], $terms[2], $terms[0] ), $found );
+
+ $found = get_terms( 'wptests_tax', array(
+ 'hide_empty' => false,
+ 'meta_query' => array(
+ array(
+ 'key' => 'foo',
+ 'compare' => 'EXISTS',
+ ),
+ ),
+ 'meta_key' => 'fee',
+ 'orderby' => 'meta_value',
+ 'order' => 'ASC',
+ 'fields' => 'ids',
+ ) );
+
+ $this->assertEqualSets( array( $terms[1], $terms[2], $terms[0] ), $found );
+
+ $found = get_terms( 'wptests_tax', array(
+ 'hide_empty' => false,
+ 'meta_query' => array(
+ 'relation' => 'AND',
+ array(
+ 'key' => 'foo',
+ 'compare' => 'EXISTS',
+ ),
+ array(
+ 'key' => 'fee',
+ 'compare' => 'EXISTS',
+ ),
+ ),
+ 'meta_key' => 'fee',
+ 'orderby' => 'meta_value',
+ 'order' => 'ASC',
+ 'fields' => 'ids',
+ ) );
+
+ $this->assertEqualSets( array( $terms[1], $terms[2], $terms[0] ), $found );
+
+ $found = get_terms( 'wptests_tax', array(
+ 'hide_empty' => false,
+ 'meta_query' => array(
+ 'relation' => 'AND',
+ array(
+ 'key' => 'foo',
+ 'compare' => 'EXISTS',
+ ),
+ array(
+ 'key' => 'fee',
+ 'compare' => 'EXISTS',
+ ),
+ ),
+ 'meta_key' => 'faa',
+ 'orderby' => 'meta_value',
+ 'order' => 'ASC',
+ 'fields' => 'ids',
+ ) );
+
+ $this->assertEqualSets( array( $terms[1], $terms[0], $terms[2] ), $found );
+ }
+
+ /**
+ * @ticket 34996
+ */
+ public function test_orderby_clause_key() {
+ register_taxonomy( 'wptests_tax', 'post' );
+ $terms = self::factory()->term->create_many( 3, array( 'taxonomy' => 'wptests_tax' ) );
+ add_term_meta( $terms[0], 'foo', 'zzz' );
+ add_term_meta( $terms[0], 'fee', 'jjj' );
+ add_term_meta( $terms[1], 'foo', 'aaa' );
+ add_term_meta( $terms[1], 'fee', 'aaa' );
+ add_term_meta( $terms[2], 'foo', 'jjj' );
+ add_term_meta( $terms[2], 'fee', 'zzz' );
+
+ $found = get_terms( 'wptests_tax', array(
+ 'hide_empty' => false,
+ 'meta_query' => array(
+ 'relation' => 'AND',
+ 'foo_key' => array(
+ 'key' => 'foo',
+ 'compare' => 'EXISTS',
+ ),
+ 'fee_key' => array(
+ 'key' => 'fee',
+ 'compare' => 'EXISTS',
+ ),
+ ),
+ 'orderby' => 'foo_key',
+ 'order' => 'ASC',
+ 'fields' => 'ids',
+ ) );
+
+ $this->assertEqualSets( array( $terms[1], $terms[2], $terms[0] ), $found );
+
+ $found = get_terms( 'wptests_tax', array(
+ 'hide_empty' => false,
+ 'meta_query' => array(
+ 'relation' => 'AND',
+ 'foo_key' => array(
+ 'key' => 'foo',
+ 'compare' => 'EXISTS',
+ ),
+ 'fee_key' => array(
+ 'key' => 'fee',
+ 'compare' => 'EXISTS',
+ ),
+ ),
+ 'orderby' => 'fee_key',
+ 'order' => 'ASC',
+ 'fields' => 'ids',
+ ) );
+
+ $this->assertEqualSets( array( $terms[1], $terms[0], $terms[2] ), $found );
+
+ $expected = get_terms( 'wptests_tax', array(
+ 'hide_empty' => false,
+ 'meta_query' => array(
+ 'relation' => 'AND',
+ 'foo_key' => array(
+ 'key' => 'foo',
+ 'compare' => 'EXISTS',
+ ),
+ 'fee_key' => array(
+ 'key' => 'fee',
+ 'compare' => 'EXISTS',
+ ),
+ ),
+ 'fields' => 'ids',
+ ) );
+
+ $found = get_terms( 'wptests_tax', array(
+ 'hide_empty' => false,
+ 'meta_query' => array(
+ 'relation' => 'AND',
+ 'foo_key' => array(
+ 'key' => 'foo',
+ 'compare' => 'EXISTS',
+ ),
+ 'fee_key' => array(
+ 'key' => 'fee',
+ 'compare' => 'EXISTS',
+ ),
+ ),
+ 'orderby' => 'faa_key',
+ 'fields' => 'ids',
+ ) );
+
+ $this->assertEqualSets( $expected, $found );
+ }
+
</ins><span class="cx" style="display: block; padding: 0 10px"> public function test_hierarchical_false_with_parent() {
</span><span class="cx" style="display: block; padding: 0 10px"> $initial_terms = $this->create_hierarchical_terms();
</span><span class="cx" style="display: block; padding: 0 10px">
</span></span></pre>
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