count all rows in rails app

gistfile1.txt

(ActiveRecord::Base.send :subclasses).inject(0) do |sum, m|
  begin
    sum + m.all.size
  rescue ActiveRecord::StatementInvalid
   "no existe"
  end
 end


ActiveRecord::Base.each_model_class.inject .. add each model class method to active record module on base class

http://stackoverflow.com/questions/12701711/heroku-row-count-incorrect

https://gist.github.com/scottwb/546281