The search is based on item from database

[raphox]

https://github.com/activerecord-hackery/ransack/blob/85fc41b329ca2b316bab32c464dd8920fae74998/lib/ransack/nodes/bindable.rb#L21

I'm using ransack-mongoid. When I try filter by reference (like role_id_eq) the value of parent is a constant refering model Role. So the code try check if exists a item on collection roles on database. Why?

Maybe the correct check is parent.to_s.present?.

activerecord-hackery/ransack#1063