return default if content_terms_of_use_id is not set, fixes #3085

Closes #3085

Merge request studip/studip!2068

lib/classes/JsonApi/Schemas/FileRef.php

@@ -179,7 +179,7 @@ class FileRef extends SchemaProvider
     private function addTermsRelationship(array $relationships, \FileRef $resource)
     {
         $relationships[self::REL_TERMS] = [
-            self::RELATIONSHIP_DATA => $resource->content_terms_of_use_id ? $resource->terms_of_use : null,
+            self::RELATIONSHIP_DATA => $resource->terms_of_use,
             self::RELATIONSHIP_LINKS_SELF => true,
         ];
 

lib/classes/JsonApi/Schemas/LibraryFile.php

@@ -180,7 +180,7 @@ class LibraryFile extends SchemaProvider
     private function addTermsRelationship(array $relationships, \FileRef $resource)
     {
         $relationships[self::REL_TERMS] = [
-            self::RELATIONSHIP_DATA => $resource->content_terms_of_use_id ? $resource->terms_of_use : null,
+            self::RELATIONSHIP_DATA => $resource->terms_of_use,
             self::RELATIONSHIP_LINKS_SELF => true,
         ];