diff --git a/library/Director/Web/Controller/Extension/DirectorDb.php b/library/Director/Web/Controller/Extension/DirectorDb.php
new file mode 100644
index 00000000..912e33d6
--- /dev/null
+++ b/library/Director/Web/Controller/Extension/DirectorDb.php
@@ -0,0 +1,34 @@
+<?php
+
+namespace Icinga\Module\Director\Web\Controller\Extension;
+
+use Icinga\Module\Director\Db;
+
+trait DirectorDb
+{
+    /** @var Db */
+    private $db;
+
+    /**
+     * @throws \Icinga\Exception\ConfigurationError
+     *
+     * @return Db
+     */
+    public function db()
+    {
+        if ($this->db === null) {
+            $resourceName = $this->Config()->get('db', 'resource');
+            if ($resourceName) {
+                $this->db = Db::fromResourceName($resourceName);
+            } else {
+                if ($this->getRequest()->isApiRequest()) {
+                    throw new ConfigurationError('Icinga Director is not correctly configured');
+                } else {
+                    $this->redirectNow('director');
+                }
+            }
+        }
+
+        return $this->db;
+    }
+}