Conditional attributes in Active Model Serializers

Question

How do I render an attribute only if some condition is true?

For example, I want to render User\'s token attribute on create action.

Answer 1

you can override the attributes method, here is a simple example:

class Foo < ActiveModel::Serializer

  attributes :id

  def attributes(*args)
    hash = super
    hash[:last_name] = 'Bob' unless object.persisted?
    hash
  end

end