Made Offers a bit more robust and operation atomic

src/admin/common/models/club.php

@@ -1,5 +1,7 @@
 <?php
 
+use Joomla\CMS\Factory;
+
 // No direct access.
 defined('_JEXEC') or die;
 
@@ -162,22 +164,35 @@ class CommonClubsModelClub extends AbstractCommonClubsModel
         $offerAssocFactory = new CommonClubsModelFactoryOfferassoc();
         $offerFactory = new CommonClubsModelFactoryOffer();
         
-        foreach($delIds as $id)
+        $db = Factory::getDbo();
+        $db->transactionStart(true);
+        
+        try
         {
-            $delId = (int) $id;
+            foreach($delIds as $id)
-            $delObjs = $offerAssocFactory->loadElements("clubid = {$this->getId()} AND offerid = $delId");
+            {
-            foreach($delObjs as $o)
+                $delId = (int) $id;
-                $o->delete();
+                $delObjs = $offerAssocFactory->loadElements("clubid = {$this->getId()} AND offerid = $delId");
+                foreach($delObjs as $o)
+                    $o->delete();
+            }
+            
+            foreach($newIds as $id)
+            {
+                $newId = (int) $id;
+                $o = $offerAssocFactory->createNew();
+                $o->setOffer($offerFactory->loadById($newId));
+                $o->setClub($this);
+                $o->save();
+            }
+        }
+        catch (Exception $ex)
+        {
+            $db->transactionRollback(true);
+            throw $ex;
         }
         
-        foreach($newIds as $id)
+        $db->transactionCommit(true);
-        {
-            $newId = (int) $id;
-            $o = $offerAssocFactory->createNew();
-            $o->setOffer($offerFactory->loadById($newId));
-            $o->setClub($this);
-            $o->save();
-        }
     }
     
     public function getUsers()

src/site/controllers/parts.json.php

@@ -349,8 +349,14 @@ class ClubsHelperControllerClub extends AbstractClubsHelperController
         
         // TODO ACL needed
         
-        $this->club->setOfferIds($ids);
+        try
-        $this->club->save();
+        {
+            $this->club->setOfferIds($ids);
+        }
+        catch(ElementNotFoundException $ex)
+        {
+            throw new InvalidUserDataException('Es gab ein Problem mit der Eingabe. Bitte Seite neu laden und Daten erneut eintragen.');
+        }
     }
 }