I need in Tasks modul, in ListView and Dashlet Listview, to filter Items by "Related to" without specifying any Item in Select field which means parent_id ~ empty and parent_type = 'Accounts'
For the moment I was able create a custom Filter, based on "Sugar_Developer_Guide" example.
This filter selects all Tasks having parent type "Account" and It works fine.
'filter_definition' => array(
'parent_type' => array(
'$equals' => 'Accounts',
From "Filter"->"Create" I am not able to create such filter because when "Select" from "Related to" is empty, this filter selects nothing.
Is any other way to achieve such a goal using Related to from this screen from above?