Allow Load object by calculated value. (#483)

* Allow Load object by calculated value.

* allow read only calculated fields.

Author: cancan101

src/Mapping/Type/TransformationDataTypeService.php

@@ -65,6 +65,8 @@ class TransformationDataTypeService
 
     const COUNTRY_ARRAY = 'countryArray';
 
+    const CALCULATED = 'calculated';
+
     protected $transformationDataTypesMapping = [
         self::DEFAULT_TYPE => [
             'input',
@@ -78,7 +80,7 @@ class TransformationDataTypeService
             'firstname',
             'lastname',
             'email',
-            'gender'
+            'gender',
         ],
         self::NUMERIC => [
             'numeric',
@@ -152,7 +154,10 @@ class TransformationDataTypeService
         ],
         self::COUNTRY_ARRAY => [
             'countrymultiselect'
-        ]
+        ],
+        self::CALCULATED =>[
+            'calculatedValue'
+        ],
     ];
 
     public function appendTypeMapping(string $pimcoreDataType, string $transformationTargetType): void
@@ -235,6 +240,10 @@ public function getPimcoreDataTypes(string $classId, $transformationTargetType,
 
         if (in_array(self::DEFAULT_TYPE, $transformationTargetType)) {
             if ($includeSystemRead) {
+                // Allow reading from calculated fields
+                foreach ($class->getFieldDefinitions() as $definition) {
+                    $this->addTypesToAttributesArray($definition, self::CALCULATED, $attributes);
+                }
                 $attributes['id'] = [
                     'key' => 'id',
                     'title' => 'SYSTEM ID',