diff --git a/Admin/Installer.php b/Admin/Installer.php
index 92d4f83..4056dd4 100644
--- a/Admin/Installer.php
+++ b/Admin/Installer.php
@@ -54,14 +54,18 @@ class Installer extends InstallerAbstract
                             `projectmanagement_project_earnings` int(11) NOT NULL,
                             `projectmanagement_project_start` datetime NOT NULL,
                             `projectmanagement_project_end` datetime NOT NULL,
+                            `projectmanagement_project_created_at` datetime NOT NULL,
+                            `projectmanagement_project_created_by` int(11) NOT NULL,
                             PRIMARY KEY (`projectmanagement_project_id`),
-                            KEY `projectmanagement_project_calendar` (`projectmanagement_project_calendar`)
+                            KEY `projectmanagement_project_calendar` (`projectmanagement_project_calendar`),
+                            KEY `projectmanagement_project_created_by` (`projectmanagement_project_created_by`)
                         )ENGINE=InnoDB DEFAULT CHARSET=utf8 AUTO_INCREMENT=1;'
                 )->execute();
 
                 $dbPool->get('core')->con->prepare(
                     'ALTER TABLE `' . $dbPool->get('core')->prefix . 'projectmanagement_project`
-                            ADD CONSTRAINT `' . $dbPool->get('core')->prefix . 'projectmanagement_project_ibfk_1` FOREIGN KEY (`projectmanagement_project_calendar`) REFERENCES `' . $dbPool->get('core')->prefix . 'calendar` (`calendar_id`);'
+                            ADD CONSTRAINT `' . $dbPool->get('core')->prefix . 'projectmanagement_project_ibfk_1` FOREIGN KEY (`projectmanagement_project_calendar`) REFERENCES `' . $dbPool->get('core')->prefix . 'calendar` (`calendar_id`),
+                            ADD CONSTRAINT `' . $dbPool->get('core')->prefix . 'projectmanagement_project_ibfk_2` FOREIGN KEY (`projectmanagement_project_created_by`) REFERENCES `' . $dbPool->get('core')->prefix . 'account` (`account_id`);'
                 )->execute();
 
                 $dbPool->get('core')->con->prepare(
diff --git a/Models/ProjectMapper.php b/Models/ProjectMapper.php
index f534f71..2b744ac 100644
--- a/Models/ProjectMapper.php
+++ b/Models/ProjectMapper.php
@@ -20,6 +20,7 @@ use phpOMS\DataStorage\Database\DataMapperAbstract;
 use phpOMS\DataStorage\Database\Query\Builder;
 use phpOMS\DataStorage\Database\Query\Column;
 use phpOMS\DataStorage\Database\RelationType;
+use Modules\Tasks\Models\TaskMapper;
 
 /**
  * Mapper class.
@@ -51,6 +52,23 @@ class ProjectMapper extends DataMapperAbstract
         'projectmanagement_project_earnings'    => ['name' => 'projectmanagement_project_earnings', 'type' => 'Serializable', 'internal' => 'earnings'],
         'projectmanagement_project_start'       => ['name' => 'projectmanagement_project_start', 'type' => 'DateTime', 'internal' => 'start'],
         'projectmanagement_project_end'         => ['name' => 'projectmanagement_project_end', 'type' => 'DateTime', 'internal' => 'end'],
+        'projectmanagement_project_created_by' => ['name' => 'projectmanagement_project_created_by', 'type' => 'int', 'internal' => 'createdBy'],
+        'projectmanagement_project_created_at'  => ['name' => 'projectmanagement_project_created_at', 'type' => 'DateTime', 'internal' => 'createdAt'],
+    ];
+
+    /**
+     * Has many relation.
+     *
+     * @var array
+     * @since 1.0.0
+     */
+    protected static $hasMany = [
+        'tasks' => [
+            'mapper'         => TaskMapper::class,
+            'table'          => 'projectmanagement_task_relation',
+            'dst'            => 'projectmanagement_task_relation_dst',
+            'src'            => 'projectmanagement_task_relation_src',
+        ],
     ];
 
     /**
@@ -66,15 +84,6 @@ class ProjectMapper extends DataMapperAbstract
         ],
     ];
 
-    /**
-     * Has many relation.
-     *
-     * @var array
-     * @since 1.0.0
-     */
-    protected static $hasMany = [
-    ];
-
     /**
      * Primary table.
      *
@@ -83,6 +92,14 @@ class ProjectMapper extends DataMapperAbstract
      */
     protected static $table = 'projectmanagement_project';
 
+    /**
+     * Created at.
+     *
+     * @var string
+     * @since 1.0.0
+     */
+    protected static $createdAt = 'projectmanagement_project_created_at';
+
     /**
      * Primary field name.
      *