[BUGFIX] Adding NULL as option in Extends type select list on editType form

A type doesn't need to extend a type.

Classes/SGalinski/TypoScriptReferenceFrontend/Controller/TsrefController.php

@@ -78,6 +78,9 @@ class TsrefController extends \TYPO3\Flow\Mvc\Controller\ActionController {
 	public function submitTypeAction(
 		Attribute $theType, $editForm, $typo3Version = TsrefRestService::TYPO3_CURRENT_VERSION_LABEL
 	) {
+		if ($theType->getParent() === -1) {
+			$theType->setParent(NULL);
+		}
 		if ($editForm) {
 			$result = $this->tsrefRestService->editAttribute($theType);
 		} else {
@@ -107,10 +110,12 @@ class TsrefController extends \TYPO3\Flow\Mvc\Controller\ActionController {
 
 		$this->prepareTypeMenu($typeId, $typo3Version);
 		$typo3Groups = $this->tsrefRestService->getAllTypo3Groups();
+		$selectMenuTypes = $this->tsrefRestService->getTypesWithNull($typo3Version);
 
 		$this->view->assign('typo3Groups', $typo3Groups);
 		$this->view->assign('theType', $theType);
 		$this->view->assign('editForm', ($typeId !== NULL));
+		$this->view->assign('selectMenuTypes', $selectMenuTypes);
 	}
 
 	/**

Classes/SGalinski/TypoScriptReferenceFrontend/Service/TsrefRestService.php

@@ -3,6 +3,7 @@
 namespace SGalinski\TypoScriptReferenceFrontend\Service;
 
 use SGalinski\TypoScriptReferenceFrontend\Domain\Model\Attribute;
+use SGalinski\TypoScriptReferenceFrontend\Utilities\Conversion;
 use TYPO3\Flow\Annotations as Flow;
 
 /**
@@ -290,4 +291,16 @@ class TsrefRestService {
 			'all' => 'All',
 		];
 	}
+
+	/**
+	 * Gets en array of types for given TYPO3 version. The types are fetched with name and id only.
+	 *
+	 * @param string $typo3Version
+	 * @return array
+	 */
+	public function getTypesWithNull($typo3Version) {
+		$typesAssociative =Conversion::toAssociativeIdNamesArray($this->getTypes(TRUE, $typo3Version));
+		$typesAssociative = [-1 => 'No type (NULL)'] + $typesAssociative;
+		return $typesAssociative;
+	}
 }
\ No newline at end of file

Resources/Private/Templates/Tsref/EditType.html

@@ -33,7 +33,7 @@
 						<label for="extends" class="col-sm-2 control-label">Extends</label>
 
 						<div class="col-sm-10">
-							<f:form.select property="parent" options="{types}" id="extends" class="form-control" />
+							<f:form.select property="parent" options="{selectMenuTypes}" id="extends" class="form-control" />
 						</div>
 					</div>