Add metadata for users, tasks and projects

app/Model/ProjectMetadata.php

@@ -0,0 +1,30 @@
+<?php
+
+namespace Kanboard\Model;
+
+/**
+ * Project Metadata
+ *
+ * @package  model
+ * @author   Frederic Guillot
+ */
+class ProjectMetadata extends Metadata
+{
+    /**
+     * SQL table name
+     *
+     * @var string
+     */
+    const TABLE = 'project_has_metadata';
+
+    /**
+     * Define the entity key
+     *
+     * @access protected
+     * @return string
+     */
+    protected function getEntityKey()
+    {
+        return 'project_id';
+    }
+}