Rails JSON API, how to deal with nil object in RABL?
I actually found the answer in the RABL documentation trying to solve another issue.
You can add an :unless block to keep it from blowing up trying to access properties on a nil object:
# questions/show.rablobject @questionattributes :id, :textnode(:answer_id, unless: lambda { |question| question.nil? }) do |question| answer = question.answers.first answer != nil ? answer.id : nilendSection in documentation: https://github.com/nesquena/rabl#attributes