Backport of MAGETWO-80198 for Magento 2.1: Fix issue #10565 #10575

omiroshnichenko · hostep · commit d95e15c3f12e · 2018-02-07T16:48:23.000+01:00
(cherry picked from commit b73d513)
diff --git a/app/code/Magento/Ui/view/base/web/js/form/element/multiselect.js b/app/code/Magento/Ui/view/base/web/js/form/element/multiselect.js
@@ -49,7 +49,7 @@ define([
          * @param {Array} data - current component value
          */
         setPrepareToSendData: function (data) {
-            if (!data.length) {
+            if (_.isUndefined(data) || !data.length) {
                 data = '';
             }
 

Original file line number	Diff line number	Diff line change
`@@ -49,7 +49,7 @@ define([`
`49`	`49`	`* @param {Array} data - current component value`
`50`	`50`	`*/`
`51`	`51`	`setPrepareToSendData: function (data) {`
`52`		`- if (!data.length) {`
	`52`	`+ if (_.isUndefined(data) \|\| !data.length) {`
`53`	`53`	`data = '';`
`54`	`54`	`}`
`55`	`55`