How do I get the last SQL query performed by ActiveRecord in Ruby on Rails?

Question

I\'m looking for something like CodeIgniter\'s:

$this->db->last_query();

(http://codeigniter.com/user_guide/database/helpers.html)

Answer 1

Probably because I have a newer version of ActiveRecord than when this question was asked, but to get it to work with ActiveRecord 3.2.3 I updated the script of Simone Carletti: I added the extra attribute binds and moved the call to alias_method_chain below the method definition because otherwise it would raise an error saying that it can't find the method.

ActiveRecord::ConnectionAdapters::AbstractAdapter.class_eval do

  attr_reader :last_query

  def log_with_last_query(sql, name, binds=[], &block)
    @last_query = [sql, name]
    log_without_last_query(sql, name, binds, &block)
  end
  alias_method_chain :log, :last_query

end

Getting the last query is still the same:

ActiveRecord::Base.connection.last_query # => ...