在oiselect angularjs中显示默认选定的选项

Question

<oi-select oi-options="student.name for student in students track by student._id" 
multiple placeholder="Select student(s)" autofocus>

这是template.html

我在directive.js中有$ scope.selectedStudents。我想在$ scope.selectedStudents中为oiselect中的默认选择选项创建名称。感谢。