Migrate All Of Your Model Classes When Using MiniRecord with Padrino

minirecord.rake

# /rake/minirecord.rake
namespace :mini_record do
  desc "Auto migration of database"
  task :migrate => :environment do
    Dir["models/*.rb"].each do |file_path|
      basename = File.basename(file_path, File.extname(file_path))
      clazz = basename.camelize.constantize
      clazz.auto_upgrade! if clazz.ancestors.include?(ActiveRecord::Base)
    end
  end
end

many thx for your fix...