create generic data transformer with get an object by id, and add test

for CalendarType

src/Bundle/ChillMainBundle/Form/DataTransformer/IdToEntityDataTransformer.php

@@ -14,6 +14,7 @@ namespace Chill\MainBundle\Form\DataTransformer;
 use Closure;
 use Doctrine\Persistence\ObjectRepository;
 use Symfony\Component\Form\DataTransformerInterface;
+use Symfony\Component\Form\Exception\TransformationFailedException;
 use function call_user_func;
 
 /**
@@ -59,7 +60,13 @@ class IdToEntityDataTransformer implements DataTransformerInterface
             return null;
         }
 
-        return $this->repository->findOneBy(['id' => (int) $value]);
+        $object = $this->repository->findOneBy(['id' => (int) $value]);
+
+        if (null === $object) {
+            throw new TransformationFailedException('could not find any object by object id');
+        }
+
+        return $object;
     }
 
     /**
@@ -71,12 +78,22 @@ class IdToEntityDataTransformer implements DataTransformerInterface
             $ids = [];
 
             foreach ($value as $v) {
-                $ids[] = call_user_func($this->getId, $v);
+                $ids[] = $id = call_user_func($this->getId, $v);
+
+                if (null === $id) {
+                    throw new TransformationFailedException('id is null');
+                }
             }
 
             return implode(',', $ids);
         }
 
-        return call_user_func($this->getId, $value);
+        $id = call_user_func($this->getId, $value);
+
+        if (null === $id) {
+            throw new TransformationFailedException('id is null');
+        }
+
+        return (string) $id;
     }
 }

src/Bundle/ChillMainBundle/Form/DataTransformer/IdToLocationDataTransformer.php

@@ -0,0 +1,22 @@
+<?php
+
+/**
+ * Chill is a software for social workers
+ *
+ * For the full copyright and license information, please view
+ * the LICENSE file that was distributed with this source code.
+ */
+
+declare(strict_types=1);
+
+namespace Chill\MainBundle\Form\DataTransformer;
+
+use Chill\MainBundle\Repository\LocationRepository;
+
+class IdToLocationDataTransformer extends IdToEntityDataTransformer
+{
+    public function __construct(LocationRepository $repository)
+    {
+        parent::__construct($repository, false);
+    }
+}

src/Bundle/ChillMainBundle/Form/DataTransformer/IdToUserDataTransformer.php

@@ -0,0 +1,22 @@
+<?php
+
+/**
+ * Chill is a software for social workers
+ *
+ * For the full copyright and license information, please view
+ * the LICENSE file that was distributed with this source code.
+ */
+
+declare(strict_types=1);
+
+namespace Chill\MainBundle\Form\DataTransformer;
+
+use Chill\MainBundle\Repository\UserRepository;
+
+class IdToUserDataTransformer extends IdToEntityDataTransformer
+{
+    public function __construct(UserRepository $repository)
+    {
+        parent::__construct($repository, false);
+    }
+}

src/Bundle/ChillMainBundle/Form/DataTransformer/IdToUsersDataTransformer.php

@@ -0,0 +1,22 @@
+<?php
+
+/**
+ * Chill is a software for social workers
+ *
+ * For the full copyright and license information, please view
+ * the LICENSE file that was distributed with this source code.
+ */
+
+declare(strict_types=1);
+
+namespace Chill\MainBundle\Form\DataTransformer;
+
+use Chill\MainBundle\Repository\UserRepository;
+
+class IdToUsersDataTransformer extends IdToEntityDataTransformer
+{
+    public function __construct(UserRepository $repository)
+    {
+        parent::__construct($repository, true);
+    }
+}