creating assignee from custom field value

[Surender Reddy]

Hi friends,

      I am creating 3 subtasks with Quick Subtasks for JIRA post function which looks like

 Creates the following subtasks according to this subtask template: 

- NSS /  cfield:"Project Title:@inherit" cfield:"Date Request Received:@inherit"
	

The issue type for the subtasks is set to Access Termination NSS.
Created subtasks are prefixed by their parent issues summary: Yes .

this creates subtask my question of how can I add an assignee automatically from a custom field(user picker) value from parent. which code should I add? I tried some but failing to pull assignee from the custom field(user picker). please help

Thank you