model.rake

namespace :db do
  namespace :data do
    task :check, [:padding] => [:environment] do |t, args|
      # padding between columns
      padding = (args[:padding] || 30).to_i

      # load all models
      Rails.application.eager_load!

      # header
      puts "%s | %s | %s" % ["Model", "Invalid", "Total"].map{|s| s.ljust(padding) }
      puts "-" * 3 * padding

      # body
      puts ActiveRecord::Base.descendants.reject{ |klass|
        # Ignore Globalize's translation tables
        klass.name.include?("::Translation")
      }.map { |klass, count = 0|
        # Count invalid models
        klass.find_each{ |model| count += 1 if model.invalid? }
        # Format result
        "%s | %s | %s" % [klass.name, count, klass.count].map{ |cell| cell.to_s.ljust(padding) }
      }
    end
  end
end