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<title>[31312] trunk: Improve support for ordering `WP_Query` results by postmeta.</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/31312">31312</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/31312","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>2015-01-31 15:47:51 +0000 (Sat, 31 Jan 2015)</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'>Improve support for ordering `WP_Query` results by postmeta.
`WP_Meta_Query` clauses now support a 'name' parameter. When building a
`WP_Query` object, the value of 'orderby' can reference this 'name', so that
it's possible to order by any clause in a meta_query, not just the first one
(as when using 'orderby=meta_value'). This improvement also makes it possible
to order by multiple meta query clauses (or by any other eligible field plus
a meta query clause), using the array syntax for 'orderby' introduced in <a href="https://core.trac.wordpress.org/changeset/29027">[29027]</a>.
Props Funkatronic, boonebgorges.
Fixes <a href="https://core.trac.wordpress.org/ticket/31045">#31045</a>.</pre>
<h3>Modified Paths</h3>
<ul>
<li><a href="#trunksrcwpincludesmetaphp">trunk/src/wp-includes/meta.php</a></li>
<li><a href="#trunksrcwpincludesqueryphp">trunk/src/wp-includes/query.php</a></li>
<li><a href="#trunktestsphpunittestsquerymetaQueryphp">trunk/tests/phpunit/tests/query/metaQuery.php</a></li>
</ul>
</div>
<div id="patch">
<h3>Diff</h3>
<a id="trunksrcwpincludesmetaphp"></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/meta.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-includes/meta.php 2015-01-31 02:11:46 UTC (rev 31311)
+++ trunk/src/wp-includes/meta.php 2015-01-31 15:47:51 UTC (rev 31312)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -934,9 +934,19 @@
</span><span class="cx" style="display: block; padding: 0 10px"> protected $table_aliases = array();
</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">+ * A flat list of clauses, keyed by clause 'name'.
+ *
+ * @since 4.2.0
+ * @var array
+ */
+ protected $clauses = array();
+
+ /**
</ins><span class="cx" style="display: block; padding: 0 10px"> * Constructor.
</span><span class="cx" style="display: block; padding: 0 10px"> *
</span><span class="cx" style="display: block; padding: 0 10px"> * @since 3.2.0
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ * @since 4.2.0 Introduced the `$name` parameter, for improved `$orderby` support in the parent query.
+ *
</ins><span class="cx" style="display: block; padding: 0 10px"> * @access public
</span><span class="cx" style="display: block; padding: 0 10px"> *
</span><span class="cx" style="display: block; padding: 0 10px"> * @param array $meta_query {
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -957,6 +967,8 @@
</span><span class="cx" style="display: block; padding: 0 10px"> * comparisons. Accepts 'NUMERIC', 'BINARY', 'CHAR', 'DATE',
</span><span class="cx" style="display: block; padding: 0 10px"> * 'DATETIME', 'DECIMAL', 'SIGNED', 'TIME', or 'UNSIGNED'.
</span><span class="cx" style="display: block; padding: 0 10px"> * Default is 'CHAR'.
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ * @type string $name Optional. A unique identifier for the clause. If provided, `$name` can be
+ * referenced in the `$orderby` parameter of the parent query.
</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">@@ -1374,6 +1386,15 @@
</span><span class="cx" style="display: block; padding: 0 10px"> // Save the alias to this clause, for future siblings to find.
</span><span class="cx" style="display: block; padding: 0 10px"> $clause['alias'] = $alias;
</span><span class="cx" style="display: block; padding: 0 10px">
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ // Determine the data type.
+ $_meta_type = isset( $clause['type'] ) ? $clause['type'] : '';
+ $meta_type = $this->get_cast_for_type( $_meta_type );
+ $clause['cast'] = $meta_type;
+
+ // Store the clause in our flat array.
+ $clause_name = isset( $clause['name'] ) ? $clause['name'] : $clause['alias'];
+ $this->clauses[ $clause_name ] =& $clause;
+
</ins><span class="cx" style="display: block; padding: 0 10px"> // Next, build the WHERE clause.
</span><span class="cx" style="display: block; padding: 0 10px">
</span><span class="cx" style="display: block; padding: 0 10px"> // meta_key.
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -1388,7 +1409,6 @@
</span><span class="cx" style="display: block; padding: 0 10px"> // meta_value.
</span><span class="cx" style="display: block; padding: 0 10px"> if ( array_key_exists( 'value', $clause ) ) {
</span><span class="cx" style="display: block; padding: 0 10px"> $meta_value = $clause['value'];
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- $meta_type = $this->get_cast_for_type( isset( $clause['type'] ) ? $clause['type'] : '' );
</del><span class="cx" style="display: block; padding: 0 10px">
</span><span class="cx" style="display: block; padding: 0 10px"> if ( in_array( $meta_compare, array( 'IN', 'NOT IN', 'BETWEEN', 'NOT BETWEEN' ) ) ) {
</span><span class="cx" style="display: block; padding: 0 10px"> if ( ! is_array( $meta_value ) ) {
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -1451,6 +1471,21 @@
</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">+ * Get a flattened list of sanitized meta clauses, indexed by clause 'name'.
+ *
+ * This array should be used for clause lookup, as when the table alias and CAST type must be determined for
+ * a value of 'orderby' corresponding to a meta clause.
+ *
+ * @since 4.2.0
+ * @access public
+ *
+ * @return array
+ */
+ public function get_clauses() {
+ return $this->clauses;
+ }
+
+ /**
</ins><span class="cx" style="display: block; padding: 0 10px"> * Identify an existing table alias that is compatible with the current
</span><span class="cx" style="display: block; padding: 0 10px"> * query clause.
</span><span class="cx" style="display: block; padding: 0 10px"> *
</span></span></pre></div>
<a id="trunksrcwpincludesqueryphp"></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/query.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-includes/query.php 2015-01-31 02:11:46 UTC (rev 31311)
+++ trunk/src/wp-includes/query.php 2015-01-31 15:47:51 UTC (rev 31312)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -2233,8 +2233,9 @@
</span><span class="cx" style="display: block; padding: 0 10px">
</span><span class="cx" style="display: block; padding: 0 10px"> $primary_meta_key = '';
</span><span class="cx" style="display: block; padding: 0 10px"> $primary_meta_query = false;
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- if ( ! empty( $this->meta_query->queries ) ) {
- $primary_meta_query = reset( $this->meta_query->queries );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ $meta_clauses = $this->meta_query->get_clauses();
+ if ( ! empty( $meta_clauses ) ) {
+ $primary_meta_query = reset( $meta_clauses );
</ins><span class="cx" style="display: block; padding: 0 10px">
</span><span class="cx" style="display: block; padding: 0 10px"> if ( ! empty( $primary_meta_query['key'] ) ) {
</span><span class="cx" style="display: block; padding: 0 10px"> $primary_meta_key = $primary_meta_query['key'];
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -2243,6 +2244,7 @@
</span><span class="cx" style="display: block; padding: 0 10px">
</span><span class="cx" style="display: block; padding: 0 10px"> $allowed_keys[] = 'meta_value';
</span><span class="cx" style="display: block; padding: 0 10px"> $allowed_keys[] = 'meta_value_num';
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ $allowed_keys = array_merge( $allowed_keys, array_keys( $meta_clauses ) );
</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"> if ( ! in_array( $orderby, $allowed_keys ) ) {
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -2260,29 +2262,36 @@
</span><span class="cx" style="display: block; padding: 0 10px"> case 'ID':
</span><span class="cx" style="display: block; padding: 0 10px"> case 'menu_order':
</span><span class="cx" style="display: block; padding: 0 10px"> case 'comment_count':
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- $orderby = "$wpdb->posts.{$orderby}";
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ $orderby_clause = "$wpdb->posts.{$orderby}";
</ins><span class="cx" style="display: block; padding: 0 10px"> break;
</span><span class="cx" style="display: block; padding: 0 10px"> case 'rand':
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- $orderby = 'RAND()';
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ $orderby_clause = 'RAND()';
</ins><span class="cx" style="display: block; padding: 0 10px"> break;
</span><span class="cx" style="display: block; padding: 0 10px"> case $primary_meta_key:
</span><span class="cx" style="display: block; padding: 0 10px"> case 'meta_value':
</span><span class="cx" style="display: block; padding: 0 10px"> if ( ! empty( $primary_meta_query['type'] ) ) {
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- $sql_type = $this->meta_query->get_cast_for_type( $primary_meta_query['type'] );
- $orderby = "CAST($wpdb->postmeta.meta_value AS {$sql_type})";
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ $orderby_clause = "CAST({$primary_meta_query['alias']}.meta_value AS {$primary_meta_query['cast']})";
</ins><span class="cx" style="display: block; padding: 0 10px"> } else {
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- $orderby = "$wpdb->postmeta.meta_value";
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ $orderby_clause = "{$primary_meta_query['alias']}.meta_value";
</ins><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px"> break;
</span><span class="cx" style="display: block; padding: 0 10px"> case 'meta_value_num':
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- $orderby = "$wpdb->postmeta.meta_value+0";
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ $orderby_clause = "{$primary_meta_query['alias']}.meta_value+0";
</ins><span class="cx" style="display: block; padding: 0 10px"> break;
</span><span class="cx" style="display: block; padding: 0 10px"> default:
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- $orderby = "$wpdb->posts.post_" . $orderby;
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ if ( array_key_exists( $orderby, $meta_clauses ) ) {
+ // $orderby corresponds to a meta_query clause.
+ $meta_clause = $meta_clauses[ $orderby ];
+ $orderby_clause = "CAST({$meta_clause['alias']}.meta_value AS {$meta_clause['cast']})";
+ } else {
+ // Default: order by post field.
+ $orderby_clause = "$wpdb->posts.post_" . sanitize_key( $orderby );
+ }
+
</ins><span class="cx" style="display: block; padding: 0 10px"> break;
</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">- return $orderby;
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ return $orderby_clause;
</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">@@ -2813,6 +2822,12 @@
</span><span class="cx" style="display: block; padding: 0 10px">
</span><span class="cx" style="display: block; padding: 0 10px"> $where .= $search . $whichauthor . $whichmimetype;
</span><span class="cx" style="display: block; padding: 0 10px">
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ if ( ! empty( $this->meta_query->queries ) ) {
+ $clauses = $this->meta_query->get_sql( 'post', $wpdb->posts, 'ID', $this );
+ $join .= $clauses['join'];
+ $where .= $clauses['where'];
+ }
+
</ins><span class="cx" style="display: block; padding: 0 10px"> $rand = ( isset( $q['orderby'] ) && 'rand' === $q['orderby'] );
</span><span class="cx" style="display: block; padding: 0 10px"> if ( ! isset( $q['order'] ) ) {
</span><span class="cx" style="display: block; padding: 0 10px"> $q['order'] = $rand ? '' : 'DESC';
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -3030,12 +3045,6 @@
</span><span class="cx" style="display: block; padding: 0 10px"> $where .= ')';
</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">- if ( !empty( $this->meta_query->queries ) ) {
- $clauses = $this->meta_query->get_sql( 'post', $wpdb->posts, 'ID', $this );
- $join .= $clauses['join'];
- $where .= $clauses['where'];
- }
-
</del><span class="cx" style="display: block; padding: 0 10px"> /*
</span><span class="cx" style="display: block; padding: 0 10px"> * Apply filters on where and join prior to paging so that any
</span><span class="cx" style="display: block; padding: 0 10px"> * manipulations to them are reflected in the paging by day queries.
</span></span></pre></div>
<a id="trunktestsphpunittestsquerymetaQueryphp"></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/metaQuery.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/tests/phpunit/tests/query/metaQuery.php 2015-01-31 02:11:46 UTC (rev 31311)
+++ trunk/tests/phpunit/tests/query/metaQuery.php 2015-01-31 15:47:51 UTC (rev 31312)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -1558,4 +1558,101 @@
</span><span class="cx" style="display: block; padding: 0 10px"> $posts = wp_list_pluck( $posts, 'ID' );
</span><span class="cx" style="display: block; padding: 0 10px"> $this->assertEqualSets( array( $post_id, $post_id3, $post_id4, $post_id5, $post_id6 ), $posts );
</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 31045
+ */
+ public function test_orderby_name() {
+ $posts = $this->factory->post->create_many( 3 );
+ add_post_meta( $posts[0], 'foo', 'aaa' );
+ add_post_meta( $posts[1], 'foo', 'zzz' );
+ add_post_meta( $posts[2], 'foo', 'jjj' );
+
+ $q = new WP_Query( array(
+ 'fields' => 'ids',
+ 'meta_query' => array(
+ array(
+ 'name' => 'foo_name',
+ 'key' => 'foo',
+ 'compare' => 'EXISTS',
+ ),
+ ),
+ 'orderby' => 'foo_name',
+ 'order' => 'DESC',
+ ) );
+
+ $this->assertEquals( array( $posts[1], $posts[2], $posts[0] ), $q->posts );
+ }
+
+ /**
+ * @ticket 31045
+ */
+ public function test_orderby_name_as_secondary_sort() {
+ $p1 = $this->factory->post->create( array(
+ 'post_date' => '2015-01-28 03:00:00',
+ ) );
+ $p2 = $this->factory->post->create( array(
+ 'post_date' => '2015-01-28 05:00:00',
+ ) );
+ $p3 = $this->factory->post->create( array(
+ 'post_date' => '2015-01-28 03:00:00',
+ ) );
+
+ add_post_meta( $p1, 'foo', 'jjj' );
+ add_post_meta( $p2, 'foo', 'zzz' );
+ add_post_meta( $p3, 'foo', 'aaa' );
+
+ $q = new WP_Query( array(
+ 'fields' => 'ids',
+ 'meta_query' => array(
+ array(
+ 'name' => 'foo_name',
+ 'key' => 'foo',
+ 'compare' => 'EXISTS',
+ ),
+ ),
+ 'orderby' => array(
+ 'post_date' => 'asc',
+ 'foo_name' => 'asc',
+ ),
+ ) );
+
+ $this->assertEquals( array( $p3, $p1, $p2 ), $q->posts );
+ }
+
+ /**
+ * @ticket 31045
+ */
+ public function test_orderby_more_than_one_name() {
+ $posts = $this->factory->post->create_many( 3 );
+
+ add_post_meta( $posts[0], 'foo', 'jjj' );
+ add_post_meta( $posts[1], 'foo', 'zzz' );
+ add_post_meta( $posts[2], 'foo', 'jjj' );
+ add_post_meta( $posts[0], 'bar', 'aaa' );
+ add_post_meta( $posts[1], 'bar', 'ccc' );
+ add_post_meta( $posts[2], 'bar', 'bbb' );
+
+ $q = new WP_Query( array(
+ 'fields' => 'ids',
+ 'meta_query' => array(
+ array(
+ 'name' => 'foo_name',
+ 'key' => 'foo',
+ 'compare' => 'EXISTS',
+ ),
+ array(
+ 'name' => 'bar_name',
+ 'key' => 'bar',
+ 'compare' => 'EXISTS',
+ ),
+ ),
+ 'orderby' => array(
+ 'foo_name' => 'asc',
+ 'bar_name' => 'desc',
+ ),
+ ) );
+
+ $this->assertEquals( array( $posts[2], $posts[0], $posts[1] ), $q->posts );
+ }
</ins><span class="cx" style="display: block; padding: 0 10px"> }
</span></span></pre>
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