From 3f97b45d7b3dfe866872286f0e69e256b3f09b8c Mon Sep 17 00:00:00 2001
From: Oleg Smirnov <smirnov.os@gmail.com>
Date: Wed, 22 Oct 2014 16:17:31 -0400
Subject: [PATCH] An empty array should be considered as the empty value for
 multiple mode. ngOptions directive has the same behavior:
 https://github.com/angular/angular.js/issues/2365
 https://github.com/angular/angular.js/pull/5337

---
 src/select.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/select.js b/src/select.js
index b9abb8031..b29b99833 100644
--- a/src/select.js
+++ b/src/select.js
@@ -161,7 +161,7 @@
     ctrl.disableChoiceExpression = undefined; // Initialized inside uiSelect directive link function
 
     ctrl.isEmpty = function() {
-      return angular.isUndefined(ctrl.selected) || ctrl.selected === null || ctrl.selected === '';
+      return angular.isUndefined(ctrl.selected) || ctrl.selected === null || ctrl.selected === '' || (ctrl.multiple && ctrl.selected.length === 0);
     };
 
     var _searchInput = $element.querySelectorAll('input.ui-select-search');