diff --git a/src/admin/common/abstract/model.php b/src/admin/common/abstract/model.php
index 6046df4..e77a31d 100644
--- a/src/admin/common/abstract/model.php
+++ b/src/admin/common/abstract/model.php
@@ -8,8 +8,12 @@ defined('_JEXEC') or die;
 
 abstract class AbstractCommonClubsModel
 {
-    protected $id; // TODO private possible?
-    protected $new;
+    // TODO Adddata validator
+    // TODO Make setting of values attribute fail in case of problems
+    // FIXME Add Joins in select statements
+    
+    private $id;
+    private $new;
     
     public function getId()
     {
@@ -98,7 +102,73 @@ abstract class AbstractCommonClubsModel
         $db->setQuery($q);
         $db->execute();
         
-        $this->values = $db->loadAssoc();
+        $values = $db->loadAssoc();
+        
+        $values = $this->unpackExternalReferencesFromKeys($values);
+        
+        $this->values = $values;
+    }
+    
+    private function packExternalReferencesAsKeys($vals)
+    {
+        foreach($this->getFactory()->getAttributes() as $k => $v)
+        {
+            if($v['type'] !== 'ref')
+                continue;
+            
+            $vals[$k] = $vals[$k]->getId();
+        }
+        
+        return $vals;
+    }
+    
+    private function unpackExternalReferencesFromKeys($vals)
+    {
+        foreach($this->getFactory()->getAttributes() as $k => $v)
+        {
+            if($v['type'] !== 'ref')
+                continue;
+            
+            if(empty($v['ref']))
+                throw new Exception('External reference of unknown class found.');
+            
+            $vals[$k] = $this->loadExternalReferenceAsObject($v['ref'], $vals[$k]);
+        }
+        
+        return $vals;
+    }
+    
+    private function loadExternalReferenceAsObject($className, $value)
+    {
+        if(! is_int($value))
+            throw new Exception('Reference with non-integer value');
+        
+        $factory = $this->getFactoryOfClass($className);
+        return $factory->loadById($value);
+    }
+    
+    private static const CLASSNAME_MAP = array(
+        
+    );
+    
+    /**
+     * @todo This must be done better and more cleanly
+     * @param string $className
+     * @return AbstractCommonClubsModelFactory
+     */
+    private function getFactoryOfClass($className)
+    {
+        if(empty(self::CLASSNAME_MAP[$className]))
+        {
+            $parts = array();
+            if(preg_match('/^CommonClubsModel(.*)/', $className, $parts))
+            {
+                return "CommonClubsModelFactory{$parts[1]}";
+            }
+            throw new Exception("Unknown mapping of class $className");
+        }
+        
+        return self::CLASSNAME_MAP[$className];
     }
     
     /**
@@ -146,12 +216,12 @@ abstract class AbstractCommonClubsModel
         return $quotedData;
     }
     
-    protected function filterRawData($values)
+    protected function filterDatabaseRawData($values)
     {
         return $values;
     }
     
-    protected function filterQuotedData($quoted)
+    protected function filterDatabaseQuotedData($quoted)
     {
         return $quoted;
     }
@@ -165,10 +235,10 @@ abstract class AbstractCommonClubsModel
     private function getQuotedData($attribs, $q)
     {
         $rawData = $this->getValues();
-        $rawData = $this->filterRawData($rawData);
+        $rawData = $this->filterDatabaseRawData($rawData);
         
         $quotedData = $this->quoteData($rawData, $attribs, $q);
-        $quotedData = $this->filterQuotedData($quotedData);
+        $quotedData = $this->filterDatabaseQuotedData($quotedData);
         
         return $quotedData;
     }
@@ -239,14 +309,47 @@ abstract class AbstractCommonClubsModel
         $db->transactionCommit();
     }
     
+    /**
+     * 
+     * @param AbstractCommonClubsModelFactory $factory
+     * @param string $colName
+     */
+    protected function fetchAssociatedElements($factory, $colName)
+    {
+        $condition = "main.$colName = {$this->id}";
+        return $factory->loadElements($condition);
+    }
+    
+    protected function filterPackData($values)
+    {
+        return $values;
+    }
+    
+    protected function filterUnpackData($values)
+    {
+        return $values;
+    }
+    
     public function pack()
     {
-        // TODO
+        $vals = $this->getValues();
+        
+        $vals = $this->packExternalReferencesAsKeys($vals);
+        $vals = $this->filterPackData($vals);
+        
+        $json = json_encode($vals);
+        return urldecode($json);
     }
     
     public function unpack($str)
     {
-        // TODO
+        $json = urlencode($str);
+        $data = json_decode($json, true);
+        
+        $vals = $this->unpackExternalReferencesFromKeys($data);
+        $vals = $this->filterUnpackData($vals);
+        
+        $this->setValues($vals);
     }
     
 }
diff --git a/src/admin/common/abstract/modelfactory.php b/src/admin/common/abstract/modelfactory.php
index 7eafc1b..ebb3169 100644
--- a/src/admin/common/abstract/modelfactory.php
+++ b/src/admin/common/abstract/modelfactory.php
@@ -55,13 +55,13 @@ abstract class AbstractCommonClubsModelFactory
         $q = $db->getQuery(true);
         
 //         $columns = array_map(function($arr) use ($q){ return $q->qn('main' . $arr['col']); }, $this->fetchAttributes());
-        $columns = array();
-        foreach($this->fetchAttributes() as $k=>$v)
-        {
-            $columns[] = $q->qn('main' . $v['col'], $k);
-        }
+//         $columns = array();
+//         foreach($this->fetchAttributes() as $k=>$v)
+//         {
+//             $columns[] = $q->qn('main' . $v['col'], $k);
+//         }
         
-        $q->select('main.id')->select($columns);
+        $q->select('main.id AS id');//->select($columns);
         $q->from($this->getTableName(), 'main');
         
         // TODO Joins
@@ -111,8 +111,11 @@ abstract class AbstractCommonClubsModelFactory
         $obj = $this->generatePlainObject($row['id']);
         $obj->marksAsNew(false);
         
-        unset($row['id']);
-        $obj->setValues($row);
+        //unset($row['id']);
+        //$obj->setValues($row);
+        
+        // Do not trigger cache if no needed
+        //$obj->getValues();
         
         return $obj;
     }