kendo scheduler field event change and field validation trigger manually

[sun]

Hi,

     In this demo: https://demos.telerik.com/kendo-ui/scheduler/timeline

     I have three drives me crazy questions(Especially the last two T_t):

        1) How can I elegantly get field value that is DropDownList type in customize validation  function , for example:  roomId or attendees.

        2) How can I code field's  change event function in edit-form , for example:  roomId or attendees.

        3) For example, I code customize validation  function for field roomId and field attendees in schema-model-fields. In roomId customize validation  function, How can I  manual programming trigger attendees's customize validation  function  for edit-form?

    Thank you very much for your help.     

[sun]

I'm sorry to disturbe you, this question has been split apart, But I don't know how to remove this question.

Thank you for help.

[sun]

I'm sorry to disturbe you, this question has been split apart, But I don't know how to remove this question.

Thank you for help.