How to grayed out the New, Edit Buttons in Child incidents Tab

[harinya]

HI 
Can some one please help on this below requirement, 
I want to grayed out the Buttons (New, Edit) in child incidents tab , if the current incident that i opened is a child (in simple user can't add child to another child incident)
If for example, Inc123 is a child incident and if i open that Inc123 below New and Edit buttons should be Grayed out in child incidents tab

Thanks in Adnvance

[Mark Manders]

Why not create a UI policy to hide the related list when it's a child incident? You will never have childs on childs, so why show it? 
An example can be found here: https://www.servicenow.com/community/developer-forum/how-to-hide-a-related-lists-based-on-certain-co...
Next to that: you can hide the buttons, but not gray them out, as far as I know.

[harinya]

Thanks for Response , it was Really Helpful

[Community Alums]

Hi @harinya ,

I tried your problem in my PDI and it's works for me

Right click on header of related list and open List Control

Add below code in Omit New Condition and Omit Edit Condition

var answer ;
gs.log("Checck log incidnet 111 = " + current.sys_id);
gs.log("Checck log incidnet 222 = " + parent.child_incidents);

if (parent.child_incidents <= 0) { //Do not remove the 'New' button
   answer = false ;
}
else { //Remove the 'New' button
   answer = true ;
}

answer ;

Please mark my answer correct and helpful if this works for you

Thanks and Regards 

Sarthak

[harinya]

Thanks for Response