Returning json in Rails 4 using MongoMapper

gistfile1.rb

# Model

class Job
  include MongoMapper::Document
  
  key :title, String
  key :description, String
end

# Controller

class Api::V1::JobsController < ApplicationController
  respond_to :json
  
  def index
    respond_with Job.all
  end
end

# Visiting /api/v1/jobs.json I get the following json

# {"jobs":[{"jobs":{"description":"Another Test!","id":"53963d2189fd48c1b2000001","title":"Test job!"}}]}

##
# Working Example
##

class Api::V1::JobsController < ActionController
  ...
  def index
    respond_with jobs: Job.all
  end
  ...
end 

# {"jobs":[{"description":"Another Test!","id":"53963d2189fd48c1b2000001","title":"Test job!"}]}