Ticket #4170: nicename.diff

wp-includes/query.php

@@ -961 +961 @@
                                 }
                         }
                         $q['author_name'] = sanitize_title($q['author_name']);
-                        $q['author'] = $wpdb->get_var("SELECT ID FROM $wpdb->users WHERE user_nicename='".$q['author_name']."'");
+                        $q['author'] = get_user_by_nicename($q['author_name']);
                         $whichauthor .= ' AND (post_author = '.intval($q['author']).')';
                 }
 

wp-includes/registration.php

@@ -121 +121 @@
 
         wp_cache_delete($user_id, 'users');
         wp_cache_delete($user_login, 'userlogins');
+        wp_cache_delete($user_nicename, 'usernicenames');
 
         if ( $update )
                 do_action('profile_update', $user_id);
@@ -181 +182 @@
         return wp_create_user($username, $password, $email);
 }
 
-?>
- No newline at end of file
+?>

wp-includes/user.php

@@ -179 +179 @@
         $user_identity  = $user->display_name;
 }
 
+function get_user_by_nicename($nicename) {
+        global $wpdb;
+
+        $user = wp_cache_get($nicename, 'usernicenames');
+
+        if ( $user == -1 )
+                return false;
+
+        if ( $user )
+                return $user;
+
+        $cache = $user = $wpdb->get_var("SELECT ID FROM $wpdb->users WHERE user_nicename='$nicename'");
+
+        if ( ! $user )
+                $cache = -1;
+
+        wp_cache_add($nicename, $cache, 'usernicenames');
+
+        return $user;
+}
+
 ?>