I have a person table and a relation to a table for absents. When listing absents I get the name by the relationship and the person_id. But now I get an error because the person is deleted. How do I check if a relation is missing?
you can check for nil of course...
eg: <%= @absent.person.name if @absent.person %>
But that is weak db/model design.
-Either don't allow deletion of persons and use an is_active flag instead, (most likely the best way to handle this)
- or make sure that if you delete a person all related records get deleted too. You can do this manually in the destroy action of the PersonsController or by using :dependent => destroy for all the associations.
