[Feature]: Disabling of language fallback (#907)

* Added getFallbackLanguageValue argument

* Apply php-cs-fixer changes

* Added sample request

---------

Co-authored-by: mcop1 <[email protected]>

Author: mcop1

doc/10_GraphQL/04_Query/08_Localization.md

@@ -87,3 +87,18 @@ However, you can always provide an alternative language for a specific field.
   }
 }
 ```
+
+### Fallback Language
+
+You can disable getting the value of the fallback language by passing the `getFallbackLanguageValue` argument.
+Set it to `false` to disable the fallback language.
+
+#####  Sample Request
+```
+query {
+ getCar(id: 1229) 
+  {
+    name(language:"de", getFallbackLanguageValue:false)
+  }
+}
+```

src/GraphQL/DataObjectQueryFieldConfigGenerator/Base.php

@@ -61,7 +61,13 @@ public function enrichConfig($fieldDefinition, $class, $attribute, $graphQLConfi
         if ($container instanceof Data\Localizedfields) {
             $graphQLConfig['args'] = $graphQLConfig['args'] ?? [];
             $graphQLConfig['args'] = array_merge($graphQLConfig['args'],
-                ['language' => ['type' => Type::string()],
+                [
+                    'language' => [
+                        'type' => Type::string(),
+                    ],
+                    'getFallbackLanguageValue' => [
+                        'type' => Type::boolean(),
+                    ],
             ]);
         }
 

src/GraphQL/FieldHelper/DataObjectFieldHelper.php

@@ -387,7 +387,14 @@ public function doExtractData(FieldNode $ast, &$data, $container, $args, $contex
                     $container,
                     $getter
                 ) {
-                    return $container->$getter($args['language'] ?? null);
+                    $orgUseFallbackValues = Localizedfield::getGetFallbackValues();
+                    Localizedfield::setGetFallbackValues(
+                        $args['getFallbackLanguageValue'] ?? $orgUseFallbackValues
+                    );
+                    $localizedValue = $container->$getter($args['language'] ?? null);
+                    Localizedfield::setGetFallbackValues($orgUseFallbackValues);
+
+                    return $localizedValue;
                 };
             } else {
                 $data[$astName] = $container->$getter();