javascript - Angular Kendo Dropdownlist automatically adds blank option -

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i using angular kendo , having strange issue kendo's dropdownlist control field bound first dropdown control on form has default ? undefined:undefined ? in it. although generated html has selected="selected" in first option. when explicitly select value in dropdown model updated properly.

the dropdown filled array in root scope.

also noticed if enable chrome's extension angularjs batarang works well.

i did debugging of angular-kendo , found out kendo automatically adding blank option has value of ? undefined:undefined ?.

<select class="s-select" kendo-drop-down-list k-data-source="lookupcache.getlookupvalues('gender')" k-data-text-field="'displayname'" k-data-value-field="'id'" k-value="'m'" ng-model="model.gender" />

where model {} default

for dynamic data source can use data-option-label, follows:

     <select name="packagename" id="packagename"        kendo-drop-down-list         k-options="dropdownlistoptions"        k-ng-model="packageselected"         ng-model="packagetypeid"         data-option-label="{value:'select...',name:''}"/>

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