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<title>[16974] trunk/wp-includes/user.php:
  Fetch only the required field in wp_dropdown_users().</title>
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<div id="msg">
<dl>
<dt>Revision</dt> <dd><a href="http://trac.wordpress.org/changeset/16974">16974</a></dd>
<dt>Author</dt> <dd>scribu</dd>
<dt>Date</dt> <dd>2010-12-15 23:56:53 +0000 (Wed, 15 Dec 2010)</dd>
</dl>

<h3>Log Message</h3>
<pre>Fetch only the required field in wp_dropdown_users(). See <a href="http://trac.wordpress.org/ticket/14572">#14572</a></pre>

<h3>Modified Paths</h3>
<ul>
<li><a href="#trunkwpincludesuserphp">trunk/wp-includes/user.php</a></li>
</ul>

</div>
<div id="patch">
<h3>Diff</h3>
<a id="trunkwpincludesuserphp"></a>
<div class="modfile"><h4>Modified: trunk/wp-includes/user.php (16973 => 16974)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/wp-includes/user.php        2010-12-15 23:21:07 UTC (rev 16973)
+++ trunk/wp-includes/user.php        2010-12-15 23:56:53 UTC (rev 16974)
</span><span class="lines">@@ -351,7 +351,8 @@
</span><span class="cx">          */
</span><span class="cx">         var $total_users = 0;
</span><span class="cx"> 
</span><del>-        // SQL pieces
</del><ins>+        // SQL clauses
+        var $query_fields;
</ins><span class="cx">         var $query_from;
</span><span class="cx">         var $query_where;
</span><span class="cx">         var $query_orderby;
</span><span class="lines">@@ -406,9 +407,20 @@
</span><span class="cx"> 
</span><span class="cx">                 $qv = &amp;$this-&gt;query_vars;
</span><span class="cx"> 
</span><del>-                $this-&gt;query_from = &quot; FROM $wpdb-&gt;users&quot;;
-                $this-&gt;query_where = &quot; WHERE 1=1&quot;;
</del><ins>+                if ( is_array( $qv['fields'] ) ) {
+                        $qv['fields'] = array_unique( $qv['fields'] );
</ins><span class="cx"> 
</span><ins>+                        $this-&gt;query_fields = array();
+                        foreach ( $qv['fields'] as $field )
+                                $this-&gt;query_fields[] = $wpdb-&gt;users . '.' . esc_sql( $field );
+                        $this-&gt;query_fields = implode( ',', $this-&gt;query_fields );
+                } else {
+                        $this-&gt;query_fields = &quot;$wpdb-&gt;users.ID&quot;;
+                }
+
+                $this-&gt;query_from = &quot;FROM $wpdb-&gt;users&quot;;
+                $this-&gt;query_where = &quot;WHERE 1=1&quot;;
+
</ins><span class="cx">                 // sorting
</span><span class="cx">                 if ( in_array( $qv['orderby'], array('nicename', 'email', 'url', 'registered') ) ) {
</span><span class="cx">                         $orderby = 'user_' . $qv['orderby'];
</span><span class="lines">@@ -437,14 +449,14 @@
</span><span class="cx">                         $order = 'ASC';
</span><span class="cx">                 else
</span><span class="cx">                         $order = 'DESC';
</span><del>-                $this-&gt;query_orderby = &quot; ORDER BY $orderby $order&quot;;
</del><ins>+                $this-&gt;query_orderby = &quot;ORDER BY $orderby $order&quot;;
</ins><span class="cx"> 
</span><span class="cx">                 // limit
</span><span class="cx">                 if ( $qv['number'] ) {
</span><span class="cx">                         if ( $qv['offset'] )
</span><del>-                                $this-&gt;query_limit = $wpdb-&gt;prepare(&quot; LIMIT %d, %d&quot;, $qv['offset'], $qv['number']);
</del><ins>+                                $this-&gt;query_limit = $wpdb-&gt;prepare(&quot;LIMIT %d, %d&quot;, $qv['offset'], $qv['number']);
</ins><span class="cx">                         else
</span><del>-                                $this-&gt;query_limit = $wpdb-&gt;prepare(&quot; LIMIT %d&quot;, $qv['number']);
</del><ins>+                                $this-&gt;query_limit = $wpdb-&gt;prepare(&quot;LIMIT %d&quot;, $qv['number']);
</ins><span class="cx">                 }
</span><span class="cx"> 
</span><span class="cx">                 $search = trim( $qv['search'] );
</span><span class="lines">@@ -510,13 +522,17 @@
</span><span class="cx">         function query() {
</span><span class="cx">                 global $wpdb;
</span><span class="cx"> 
</span><del>-                $this-&gt;results = $wpdb-&gt;get_col(&quot;SELECT $wpdb-&gt;users.ID&quot; . $this-&gt;query_from . $this-&gt;query_where . $this-&gt;query_orderby . $this-&gt;query_limit);
</del><ins>+                if ( is_array( $this-&gt;query_vars['fields'] ) ) {
+                        $this-&gt;results = $wpdb-&gt;get_results(&quot;SELECT $this-&gt;query_fields $this-&gt;query_from $this-&gt;query_where $this-&gt;query_orderby $this-&gt;query_limit&quot;);
+                } else {
+                        $this-&gt;results = $wpdb-&gt;get_col(&quot;SELECT $this-&gt;query_fields $this-&gt;query_from $this-&gt;query_where $this-&gt;query_orderby $this-&gt;query_limit&quot;);
+                }
</ins><span class="cx"> 
</span><span class="cx">                 if ( !$this-&gt;results )
</span><span class="cx">                         return;
</span><span class="cx"> 
</span><span class="cx">                 if ( $this-&gt;query_vars['count_total'] )
</span><del>-                        $this-&gt;total_users = $wpdb-&gt;get_var(&quot;SELECT COUNT($wpdb-&gt;users.ID)&quot; . $this-&gt;query_from . $this-&gt;query_where);
</del><ins>+                        $this-&gt;total_users = $wpdb-&gt;get_var(&quot;SELECT COUNT($wpdb-&gt;users.ID) $this-&gt;query_from $this-&gt;query_where $this-&gt;query_orderby $this-&gt;query_limit&quot;);
</ins><span class="cx"> 
</span><span class="cx">                 if ( 'all' == $this-&gt;query_vars['fields'] ) {
</span><span class="cx">                         cache_users($this-&gt;results);
</span><span class="lines">@@ -967,8 +983,11 @@
</span><span class="cx">         $r = wp_parse_args( $args, $defaults );
</span><span class="cx">         extract( $r, EXTR_SKIP );
</span><span class="cx"> 
</span><del>-        $users = get_users( wp_array_slice_assoc( $r, array( 'blog_id', 'include', 'exclude', 'orderby', 'order' ) ) );
</del><ins>+        $query_args = wp_array_slice_assoc( $r, array( 'blog_id', 'include', 'exclude', 'orderby', 'order' ) );
+        $query_args['fields'] = array( 'ID', $show );
</ins><span class="cx"> 
</span><ins>+        $users = get_users( $query_args );
+
</ins><span class="cx">         $output = '';
</span><span class="cx">         if ( !empty($users) ) {
</span><span class="cx">                 $name = esc_attr( $name );
</span></span></pre>
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