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<title>[31663] trunk: Improve 'orderby' syntax for `WP_User_Query`.</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/31663">31663</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/31663","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>2015-03-07 16:05:11 +0000 (Sat, 07 Mar 2015)</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'>Improve 'orderby' syntax for `WP_User_Query`.

This changeset ports a number of 'orderby' features from `WP_Query` and
`WP_Comment_Query`:

* Allow multiple 'orderby' values to be passed as a space-separated list.
* Allow multiple 'orderby' values to be passed as a flat array.
* Allow multi-dimensional 'orderby', with orderby fields as array keys and ASC/DESC as the corresponding values.

See <a href="https://core.trac.wordpress.org/ticket/31265">#31265</a>.</pre>

<h3>Modified Paths</h3>
<ul>
<li><a href="#trunksrcwpincludesuserphp">trunk/src/wp-includes/user.php</a></li>
<li><a href="#trunktestsphpunittestsuserqueryphp">trunk/tests/phpunit/tests/user/query.php</a></li>
</ul>

</div>
<div id="patch">
<h3>Diff</h3>
<a id="trunksrcwpincludesuserphp"></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/user.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-includes/user.php    2015-03-07 15:44:28 UTC (rev 31662)
+++ trunk/src/wp-includes/user.php      2015-03-07 16:05:11 UTC (rev 31663)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -500,7 +500,8 @@
</span><span class="cx" style="display: block; padding: 0 10px">         * Prepare the query variables.
</span><span class="cx" style="display: block; padding: 0 10px">         *
</span><span class="cx" style="display: block; padding: 0 10px">         * @since 3.1.0
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-         * @since 4.2.0 Added 'meta_value_num' support for `$orderby` parameter.
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+  * @since 4.2.0 Added 'meta_value_num' support for `$orderby` parameter. Added multi-dimensional array syntax
+        *              for `$orderby` parameter.
</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 string|array $query {
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -521,13 +522,18 @@
</span><span class="cx" style="display: block; padding: 0 10px">         *                                         column to search in based on search string. Default empty.
</span><span class="cx" style="display: block; padding: 0 10px">         *     @type array        $search_columns  Array of column names to be searched. Accepts 'ID', 'login',
</span><span class="cx" style="display: block; padding: 0 10px">         *                                         'nicename', 'email', 'url'. Default empty array.
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-         *     @type string       $orderby         Field to sort the retrieved users by. Accepts 'ID', 'display_name',
-        *                                         'login', 'nicename', 'email', 'url', 'registered', 'post_count',
-        *                                         'meta_value' or 'meta_value_num'. To use 'meta_value' or
-        *                                         'meta_value_num', `$meta_key` must be also be defined.
-        *                                         Default 'user_login'.
-        *     @type string       $order           Designates ascending or descending order of users. Accepts 'ASC',
-        *                                         'DESC'. Default 'ASC'.
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+  *     @type string|array $orderby         Field to sort the retrieved users by. May be a single value,
+        *                                         an array of values, or a multi-dimensional array with fields as keys
+        *                                         and orders ('ASC' or 'DESC') as values. Accepted values are'ID',
+        *                                         'display_name' (or 'name'), 'user_login' (or 'login'),
+        *                                         'user_nicename' (or 'nicename'), 'user_email' (or 'email'),
+        *                                         'user_url' (or 'url'), 'user_registered' (or 'registered'),
+        *                                         'post_count', 'meta_value', or 'meta_value_num'. To use 'meta_value'
+        *                                         or 'meta_value_num', `$meta_key` must be also be defined.
+        *                                         Default 'user_login'.
+        *     @type string       $order           Designates ascending or descending order of users. Order values
+        *                                         passed as part of an `$orderby` array take precedence over this
+        *                                         parameter. Accepts 'ASC', 'DESC'. Default 'ASC'.
</ins><span class="cx" style="display: block; padding: 0 10px">          *     @type int          $offset          Number of users to offset in retrieved results. Can be used in
</span><span class="cx" style="display: block; padding: 0 10px">         *                                         conjunction with pagination. Default 0.
</span><span class="cx" style="display: block; padding: 0 10px">         *     @type int          $number          Number of users to limit the query for. Can be used in conjunction
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -611,48 +617,50 @@
</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">                // sorting
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                if ( isset( $qv['orderby'] ) ) {
-                       if ( in_array( $qv['orderby'], array('nicename', 'email', 'url', 'registered') ) ) {
-                               $orderby = 'user_' . $qv['orderby'];
-                       } elseif ( in_array( $qv['orderby'], array('user_nicename', 'user_email', 'user_url', 'user_registered') ) ) {
-                               $orderby = $qv['orderby'];
-                       } elseif ( 'name' == $qv['orderby'] || 'display_name' == $qv['orderby'] ) {
-                               $orderby = 'display_name';
-                       } elseif ( 'post_count' == $qv['orderby'] ) {
-                               // todo: avoid the JOIN
-                               $where = get_posts_by_author_sql('post');
-                               $this->query_from .= " LEFT OUTER JOIN (
-                                       SELECT post_author, COUNT(*) as post_count
-                                       FROM $wpdb->posts
-                                       $where
-                                       GROUP BY post_author
-                               ) p ON ({$wpdb->users}.ID = p.post_author)
-                               ";
-                               $orderby = 'post_count';
-                       } elseif ( 'ID' == $qv['orderby'] || 'id' == $qv['orderby'] ) {
-                               $orderby = 'ID';
-                       } elseif ( 'meta_value' == $qv['orderby'] ) {
-                               $orderby = "$wpdb->usermeta.meta_value";
-                       } elseif ( 'meta_value_num' == $qv['orderby'] ) {
-                               $orderby = "$wpdb->usermeta.meta_value+0";
-                       } elseif ( 'include' === $qv['orderby'] && ! empty( $include ) ) {
-                               // Sanitized earlier.
-                               $include_sql = implode( ',', $include );
-                               $orderby = "FIELD( $wpdb->users.ID, $include_sql )";
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         $qv['order'] = isset( $qv['order'] ) ? strtoupper( $qv['order'] ) : '';
+               $order = $this->parse_order( $qv['order'] );
+
+               if ( empty( $qv['orderby'] ) ) {
+                       // Default order is by 'user_login'.
+                       $ordersby = array( 'user_login' => $order );
+               } else if ( is_array( $qv['orderby'] ) ) {
+                       $ordersby = $qv['orderby'];
+               } else {
+                       // 'orderby' values may be a comma- or space-separated list.
+                       $ordersby = preg_split( '/[,\s]+/', $qv['orderby'] );
+               }
+
+               $orderby_array = array();
+               foreach ( $ordersby as $_key => $_value ) {
+                       if ( ! $_value ) {
+                               continue;
+                       }
+
+                       if ( is_int( $_key ) ) {
+                               // Integer key means this is a flat array of 'orderby' fields.
+                               $_orderby = $_value;
+                               $_order = $order;
</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 = 'user_login';
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                         // Non-integer key means this the key is the field and the value is ASC/DESC.
+                               $_orderby = $_key;
+                               $_order = $_value;
</ins><span class="cx" style="display: block; padding: 0 10px">                         }
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+
+                       $parsed = $this->parse_orderby( $_orderby );
+
+                       if ( ! $parsed ) {
+                               continue;
+                       }
+
+                       $orderby_array[] = $parsed . ' ' . $this->parse_order( $_order );
</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 ( empty( $orderby ) )
-                       $orderby = 'user_login';
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         // If no valid clauses were found, order by user_login.
+               if ( empty( $orderby_array ) ) {
+                       $orderby_array[] = "user_login $order";
+               }
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                $qv['order'] = isset( $qv['order'] ) ? strtoupper( $qv['order'] ) : '';
-               if ( 'ASC' == $qv['order'] )
-                       $order = 'ASC';
-               else
-                       $order = 'DESC';
-               $this->query_orderby = "ORDER BY $orderby $order";
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         $this->query_orderby = 'ORDER BY ' . implode( ', ', $orderby_array );
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">                // limit
</span><span class="cx" style="display: block; padding: 0 10px">                if ( isset( $qv['number'] ) && $qv['number'] ) {
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -925,6 +933,74 @@
</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">+         * Parse and sanitize 'orderby' keys passed to the user query.
+        *
+        * @since 4.2.0
+        * @access protected
+        *
+        * @global wpdb $wpdb WordPress database abstraction object.
+        *
+        * @param string $orderby Alias for the field to order by.
+        * @return string|bool Value to used in the ORDER clause, if `$orderby` is valid. False otherwise.
+        */
+       protected function parse_orderby( $orderby ) {
+               global $wpdb;
+
+               $_orderby = '';
+               if ( in_array( $orderby, array( 'login', 'nicename', 'email', 'url', 'registered' ) ) ) {
+                       $_orderby = 'user_' . $orderby;
+               } elseif ( in_array( $orderby, array( 'user_login', 'user_nicename', 'user_email', 'user_url', 'user_registered' ) ) ) {
+                       $_orderby = $orderby;
+               } elseif ( 'name' == $orderby || 'display_name' == $orderby ) {
+                       $_orderby = 'display_name';
+               } elseif ( 'post_count' == $orderby ) {
+                       // todo: avoid the JOIN
+                       $where = get_posts_by_author_sql( 'post' );
+                       $this->query_from .= " LEFT OUTER JOIN (
+                               SELECT post_author, COUNT(*) as post_count
+                               FROM $wpdb->posts
+                               $where
+                               GROUP BY post_author
+                       ) p ON ({$wpdb->users}.ID = p.post_author)
+                       ";
+                       $_orderby = 'post_count';
+               } elseif ( 'ID' == $orderby || 'id' == $orderby ) {
+                       $_orderby = 'ID';
+               } elseif ( 'meta_value' == $orderby ) {
+                       $_orderby = "$wpdb->usermeta.meta_value";
+               } elseif ( 'meta_value_num' == $orderby ) {
+                       $_orderby = "$wpdb->usermeta.meta_value+0";
+               } elseif ( 'include' === $orderby && ! empty( $this->query_vars['include'] ) ) {
+                       $include = wp_parse_id_list( $this->query_vars['include'] );
+                       $include_sql = implode( ',', $include );
+                       $_orderby = "FIELD( $wpdb->users.ID, $include_sql )";
+               }
+
+               return $_orderby;
+       }
+
+       /**
+        * Parse an 'order' query variable and cast it to ASC or DESC as necessary.
+        *
+        * @since 4.2.0
+        * @access protected
+        *
+        * @param string $order The 'order' query variable.
+        * @return string The sanitized 'order' query variable.
+        */
+       protected function parse_order( $order ) {
+               if ( ! is_string( $order ) || empty( $order ) ) {
+                       return 'DESC';
+               }
+
+               if ( 'ASC' === strtoupper( $order ) ) {
+                       return 'ASC';
+               } else {
+                       return 'DESC';
+               }
+       }
+
+       /**
</ins><span class="cx" style="display: block; padding: 0 10px">          * Make private properties readable for backwards compatibility.
</span><span class="cx" style="display: block; padding: 0 10px">         *
</span><span class="cx" style="display: block; padding: 0 10px">         * @since 4.0.0
</span></span></pre></div>
<a id="trunktestsphpunittestsuserqueryphp"></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/user/query.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/tests/phpunit/tests/user/query.php  2015-03-07 15:44:28 UTC (rev 31662)
+++ trunk/tests/phpunit/tests/user/query.php    2015-03-07 16:05:11 UTC (rev 31663)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -231,6 +231,93 @@
</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">+         * @ticket 31265
+        */
+       public function test_orderby_space_separated() {
+               global $wpdb;
+
+               $q = new WP_User_Query( array(
+                       'orderby' => 'login nicename',
+                       'order' => 'ASC',
+               ) );
+
+               $this->assertContains( "ORDER BY user_login ASC, user_nicename ASC", $q->query_orderby );
+       }
+
+       /**
+        * @ticket 31265
+        */
+       public function test_orderby_flat_array() {
+               global $wpdb;
+
+               $q = new WP_User_Query( array(
+                       'orderby' => array( 'login', 'nicename' ),
+               ) );
+
+               $this->assertContains( "ORDER BY user_login ASC, user_nicename ASC", $q->query_orderby );
+       }
+
+       /**
+        * @ticket 31265
+        */
+       public function test_orderby_array_contains_invalid_item() {
+               global $wpdb;
+
+               $q = new WP_User_Query( array(
+                       'orderby' => array( 'login', 'foo', 'nicename' ),
+               ) );
+
+               $this->assertContains( "ORDER BY user_login ASC, user_nicename ASC", $q->query_orderby );
+       }
+
+       /**
+        * @ticket 31265
+        */
+       public function test_orderby_array_contains_all_invalid_items() {
+               global $wpdb;
+
+               $q = new WP_User_Query( array(
+                       'orderby' => array( 'foo', 'bar', 'baz' ),
+               ) );
+
+               $this->assertContains( "ORDER BY user_login", $q->query_orderby );
+       }
+
+       /**
+        * @ticket 31265
+        */
+       public function test_orderby_array() {
+               global $wpdb;
+
+               $q = new WP_User_Query( array(
+                       'orderby' => array(
+                               'login' => 'DESC',
+                               'nicename' => 'ASC',
+                               'email' => 'DESC',
+                       ),
+               ) );
+
+               $this->assertContains( "ORDER BY user_login DESC, user_nicename ASC, user_email DESC", $q->query_orderby );
+       }
+
+       /**
+        * @ticket 31265
+        */
+       public function test_orderby_array_should_discard_invalid_columns() {
+               global $wpdb;
+
+               $q = new WP_User_Query( array(
+                       'orderby' => array(
+                               'login' => 'DESC',
+                               'foo' => 'ASC',
+                               'email' => 'ASC',
+                       ),
+               ) );
+
+               $this->assertContains( "ORDER BY user_login DESC, user_email ASC", $q->query_orderby );
+       }
+
+       /**
</ins><span class="cx" style="display: block; padding: 0 10px">          * @ticket 21119
</span><span class="cx" style="display: block; padding: 0 10px">         */
</span><span class="cx" style="display: block; padding: 0 10px">        function test_prepare_query() {
</span></span></pre>
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