rails admin module for serailize data

metadata.rb

require 'rails_admin/config/fields/base'

module RailsAdmin
class Metadata < RailsAdmin::Config::Fields::Base
   RailsAdmin::Config::Fields::Types::register(self)

   def value
     raise 'No metadata!' unless bindings[:object].respond_to?(:metadata)
     bindings[:object].metadata[method_name]
   end

   def allowed_methods
     'metadata'
   end

   def parse_input(params)
     params['metadata'] ||=bindings[:object].metadata
     params['metadata'][method_name] = params.delete(method_name)
   end

end
end