How to make one custom field to be required based on another custom field value?

[Valeriya Petrukhina]

FormField pro = getFieldByName("QA Status") 
FormField ecp = getFieldByName("Reason")    
 
String vpro = (String) pro.getFormValue() 
String vecp = (String) ecp.getFormValue()      
 
	if (vpro == "Test in Product") {               
    	ecp.setRequired(true)   
} 
	else {         
	ecp.setRequired(false)  
}

I tryed to use getFieldByID but no luck.

please, help!

Thank you!

[Valeriya Petrukhina]

Description was lost((

I have two custom field QA Status with id 10800 and Reason with id 13202

I need to make Reason required if QA Status is seet to "Test in product"

I try to use Behaviours (integrated wit Script Runner) on JIRA Standalone 6.3.3

My script is above.