Use helper method in JSON with RABL?

Question

I have a simple index.json.rabl file with the following content:

collection @calls

attributes :time, :destination, :source, :duration

I also have a helper method which replaces the source value with a company name:

  def format_destination(destination_number)
    case destination_number
    when "12345
      "Name One"
    when "67891"
      "Name Two"
    else
      destination_number
    end
  end

Is it possible to replace the :source attribute in the RABL file with the helper method?

Answer 1

You can do that using node:

collection @calls
attributes :time, :destination, :duration
node(:source) { |call| format_destination(call.source) }