ruby - Unsupported field datatype: metadata -


i have error message:

unsupported field datatype: metadata. extracted source (around line #23):  21      end 22 23  configure :block, :metadata 24       25  configure :sticky, :metadata 26      view_helper :check_box

i'm doing presentation gem rails_admin. , in slide 29 put in post , has error. files:

/lib/rails_admin/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

/models/blog/post.rb

class blog::post < activerecord::base     has_many :comments     belongs_to :user      accepts_nested_attributes_for :comments      serialize :metadata, hash      rails_admin           configure :user             visible                 bindings[:controller].current_ability.can? :edit, user             end         end          configure :comments             visible                 bindings[:controller].current_ability.can? :edit, blog::comment             end         end          configure :block, :metadata         configure :sticky, :metadata             view_helper :check_box         end          configure :published, :metadata             view_helper :check_box         end          configure :priority, :metadata             view_helper :number_field             defaul_value 0         end     end end

you have require "#{rails.root}/lib/rails_admin/metadata" in head of rails_admin initializer.

or add lib folder in rails autoload paths.

in config/application.rb add: config.autoload_paths = %w(#{config.root}/lib)

btw serialized datatype in rails_admin implemented: https://github.com/sferik/rails_admin/blob/master/lib/rails_admin/config/fields/types/serialized.rb


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