How to create advance reference qualifier with if and else conditions

[rahul16]

I am using a variable set and I am filtering conditions like

Application<category<sub-category

if there is no application then category<sub-category

javascript&colon; 'u_type=category^u_inactive=false^u_catalog_item='+(current.cat_item.sys_id||current.request_item.cat_item.sys_id)+'^u_application='+current.variables.application;

This will work only if user select application

How can I use it if the application is empty set the application as empty?

if(current.variables.application){
return current.variables.application;
}else{
return '';
}

I created like this 

javascript&colon;if (current.variables.application != "") 'u_type=category^u_inactive=false^u_catalog_item='+(current.cat_item.sys_id||current.request_item.cat_item.sys_id)+'^u_application='+current.variables.application;else 'u_type=category^u_inactive=false^u_catalog_item='+(current.cat_item.sys_id||current.request_item.cat_item.sys_id);

but else part not working

[rahul16]

Yes thank you what is the difference between "!current.variables.application" and this current.variables.application != "" ? 

Why for me !current.variables.application this worked

[Ankur Bawiskar]

when you use this !current.variables.application it means the value is not empty or not null

[Kenneth Zabrisk]

From a syntax perspective, I was expecting the last part to be "return query" rather than just "query".   But I'm still a novice in javascript.

[TejasriK]

javascript&colon; current.variables.application != "" ? 'u_type=category^u_inactive=false^u_catalog_item='+(current.cat_item.sys_id||current.request_item.cat_item.sys_id)+'^u_application='+current.variables.application : 'u_type=category^u_inactive=false^u_catalog_item='+(current.cat_item.sys_id||current.request_item.cat_item.sys_id);

syntax for if else condition is - condition ? executes if true : executes if false
specify the condition and if it is true then the line before colon will executes if the condition is false the line after the colon will executes.

[TejasriK]

javascript: current.variables.application != "" ? 'u_type=category^u_inactive=false^u_catalog_item='+(current.cat_item.sys_id||current.request_item.cat_item.sys_id)+'^u_application='+current.variables.application : 'u_type=category^u_inactive=false^u_catalog_item='+(current.cat_item.sys_id||current.request_item.cat_item.sys_id);

syntax for if else condition is - condition ? executes if true : executes if false
specify the condition and if it is true then the line before colon will executes if the condition is false the line after the colon will executes.