Serialize array as RestfulX friendly JSON (with metadata)
# File lib/restfulx/rx_active_support.rb, line 135 def to_json(options = {}) attributes = options.delete(:attributes) return (attributes.nil?) ? to_json_original(options) : "[{#{'metadata'.inspect}: #{attributes.to_json}},#{to_json_original(options)[1..-1]}]" end