Merge pull request #1106 - get correct MetaModel

The property "pid" reference in dca settings refers to to dca config.
So we have to go one reference higher to obtain the MetaModel.

Author: discordier

contao/dca/tl_metamodel_dcasetting.php

@@ -20,6 +20,7 @@
  * @author     Stefan Heimes <stefan_heimes@hotmail.com>
  * @author     Richard Henkenjohann <richardhenkenjohann@googlemail.com>
  * @author     Cliff Parnitzky <github@cliff-parnitzky.de>
+ * @author     Sven Baumann <baumann.sv@gmail.com>
  * @copyright  2012-2017 The MetaModels team.
  * @license    https://github.com/MetaModels/core/blob/master/LICENSE LGPL-3.0
  * @filesource
@@ -77,6 +78,15 @@
                     ),
                 ),
                 'filter' => array
+                (
+                    array
+                    (
+                        'local'     => 'pid',
+                        'remote'    => 'id',
+                        'operation' => '=',
+                    ),
+                ),
+                'inverse' => array
                 (
                     array
                     (

src/MetaModels/DcGeneral/Events/Table/InputScreens/Subscriber.php

@@ -3,7 +3,7 @@
 /**
  * This file is part of MetaModels/core.
  *
- * (c) 2012-2015 The MetaModels team.
+ * (c) 2012-2017 The MetaModels team.
  *
  * For the full copyright and license information, please view the LICENSE
  * file that was distributed with this source code.
@@ -14,6 +14,7 @@
  * @subpackage Core
  * @author     Christian Schiffler <c.schiffler@cyberspectrum.de>
  * @author     Cliff Parnitzky <github@cliff-parnitzky.de>
+ * @author     Sven Baumann <baumann.sv@gmail.com>
  * @copyright  2012-2017 The MetaModels team.
  * @license    https://github.com/MetaModels/core/blob/master/LICENSE LGPL-3.0
  * @filesource
@@ -357,7 +358,7 @@ public function buildMandatoryWidget(BuildWidgetEvent $event)
         }
 
         $model     = $event->getModel();
-        $metaModel = $this->getMetaModelById($model->getProperty('pid'));
+        $metaModel = $this->getMetaModelById($this->getMetaModelId($event));
 
         if ($metaModel->getAttributeById($model->getProperty('attr_id'))->get('isunique')) {
             Message::addInfo(
@@ -617,4 +618,44 @@ public function buildPaletteRestrictions(BuildDataDefinitionEvent $event)
             }
         }
     }
+
+    /**
+     * Get the id from the meta model.
+     *
+     * @param BuildWidgetEvent $event The event.
+     *
+     * @return string
+     */
+    protected function getMetaModelId(BuildWidgetEvent $event)
+    {
+        $environment          = $event->getEnvironment();
+        $dataDefinition       = $environment->getDataDefinition();
+        $parentDataDefinition = $environment->getParentDataDefinition();
+        $parentDataProvider   = $environment->getDataProvider($parentDataDefinition->getName());
+        $relationship         = $dataDefinition->getModelRelationshipDefinition();
+        $parentRelationship   = $parentDataDefinition->getModelRelationshipDefinition();
+
+        $childCondition =
+            $relationship->getChildCondition($parentDataDefinition->getName(), $dataDefinition->getName());
+
+        $parentModel = $parentDataProvider->fetch(
+            $parentDataProvider->getEmptyConfig()
+                ->setFilter($childCondition->getInverseFilterFor($event->getModel()))
+        );
+
+        $metaModelDataProvider =
+            $environment->getDataProvider($parentDataDefinition->getBasicDefinition()->getParentDataProvider());
+
+        $parentChildCondition = $parentRelationship->getChildCondition(
+            $parentDataDefinition->getBasicDefinition()->getParentDataProvider(),
+            $parentDataDefinition->getName()
+        );
+
+        $metaModel = $metaModelDataProvider->fetch(
+            $metaModelDataProvider->getEmptyConfig()
+                ->setFilter($parentChildCondition->getInverseFilterFor($parentModel))
+        );
+
+        return $metaModel->getId();
+    }
 }