rake db:migrate

dependencies.rb

require './lib/photo_associations'

environment.rb

# Load the Rails application.
require File.expand_path('../application', __FILE__)

# Initialize the Rails application.
Qjnavi::Application.initialize!

error

rake db:migrate
WARNING: Nokogiri was built against LibXML version 2.8.0, but has dynamically loaded 2.7.8
rake aborted!
NoMethodError: private method `include' called for ActiveRecord::Base:Class
/home/thinb/rqjn/lib/photo_associations.rb:15:in `<top (required)>'
/home/thinb/rqjn/config/initializers/dependencies.rb:1:in `<top (required)>'
/home/thinb/rqjn/config/environment.rb:5:in `<top (required)>'
Tasks: TOP => db:migrate => environment
(See full trace by running task with --trace)

Photo_associations.rb

module PhotoAssociations
  extend ActiveSupport::Concern

  module ClassMethods
    def has_many_photos(name)
      has_many name, -> { where(kind: name.to_s) }, { as: :photoable, class_name: 'Photo' }
    end

    def has_one_photo(name)
      has_one name, -> { where(kind: name.to_s).order('id desc') }, { as: :photoable, class_name: 'Photo' }
    end
  end
end

ActiveRecord::Base.include(PhotoAssociations)

rake db:migrate
WARNING: Nokogiri was built against LibXML version 2.8.0, but has dynamically loaded 2.7.8
rake aborted!
Dalli::RingError: No server available
/home/thinb/rqjn/config/environment.rb:5:in `<top (required)>'
Tasks: TOP => db:migrate => environment
(See full trace by running task with --trace)