From cdc8ff00159d9dd5ec9ec2995377c10ee57d61b8 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Pavel=20Zl=C3=A1mal?= <zlamal@cesnet.cz>
Date: Mon, 23 May 2022 13:45:08 +0200
Subject: [PATCH] fix(registrar): return empty value if no option selected in
 selectbox

- Previously generic "--- Not selected ---" option in the select box returned
  "null" string value.
- Now we return empty string which is correctly recognized as an empty/null
  value for the attribute on Perun side.
- This prevents bug when such value should be stored in attribute
  with checked syntax.
---
 .../perun/wui/registrar/widgets/items/Selectionbox.java         | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/perun-wui-registrar/src/main/java/cz/metacentrum/perun/wui/registrar/widgets/items/Selectionbox.java b/perun-wui-registrar/src/main/java/cz/metacentrum/perun/wui/registrar/widgets/items/Selectionbox.java
index 38c7a49f..418c197f 100644
--- a/perun-wui-registrar/src/main/java/cz/metacentrum/perun/wui/registrar/widgets/items/Selectionbox.java
+++ b/perun-wui-registrar/src/main/java/cz/metacentrum/perun/wui/registrar/widgets/items/Selectionbox.java
@@ -43,7 +43,7 @@ protected Widget initWidget() {
 		getSelect().clear();
 
 		if (!isRequired()) {
-			getSelect().addItem(translation.notSelected(), (String) null);
+			getSelect().addItem(translation.notSelected(), "");
 		}
 
 		Map<String, String> opts = parseItemOptions();