2 files changed, 22 insertions, 1 deletions
diff --git a/application/config/migration.php b/application/config/migration.php
index bfcc3aed7..ad75f740c 100644
--- a/application/config/migration.php
+++ b/application/config/migration.php
@@ -21,7 +21,7 @@ $config['migration_enabled'] = true;
 | be upgraded / downgraded to.
 |
 */
-$config['migration_version'] = 5;
+$config['migration_version'] = 6;
 
 
 /*
diff --git a/application/migrations/006_add_username_index.php b/application/migrations/006_add_username_index.php
new file mode 100644
index 000000000..cdeefedc4
--- /dev/null
+++ b/application/migrations/006_add_username_index.php
@@ -0,0 +1,21 @@
+<?php
+defined('BASEPATH') OR exit('No direct script access allowed');
+
+class Migration_Add_username_index extends CI_Migration {
+
+	public function up()
+	{
+		$this->db->query("
+			ALTER TABLE `users`
+			ADD UNIQUE `username` (`username`);
+		");
+	}
+
+	public function down()
+	{
+		$this->db->query("
+			ALTER TABLE `files`
+			DROP INDEX `username`;
+		");
+	}
+}