Need to create an approval on purchase order table related list by using workflow

[rahul kumar10]

Need to create an approver approval on Purchase Order table related list by using runscript in workflow, because workflow is on RITM and approval approver should be taken from a user reference field which is available as (approver 1 and approver 2)on purchase order table.

[BharathChintala]

@rahul kumar10 found the issue

in relationship just keep any one query only

current.addQuery('document_id', parent.getUniqueValue());

or

current.addQuery('sysapproval',parent.getUniqueValue());

[rahul kumar10]

Still facing the same issue .