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

Override is a good idea, but if you use the super the attributes will be calculated before you remove what you want. If it does not make difference to you, ok, but when it does, you can use it:

def attributes(options={})
  attributes =
    if options[:fields]
      self.class._attributes & options[:fields]
    else
      self.class._attributes.dup
    end

  attributes.delete_if {|attr| attr == :attribute_name } if condition

  attributes.each_with_object({}) do |name, hash|
    unless self.class._fragmented
      hash[name] = send(name)
    else
      hash[name] = self.class._fragmented.public_send(name)
    end
  end
end

ps: v0.10.0.rc3