Question

Is there a way to see which MySQL queries are fired from ActiveRecord in the rails console?

Answer 1

Yes, this can be achieved through redirecting rails log to standard output.

Write these in your console prompt:

ActiveRecord::Base.logger = Logger.new(STDOUT)
ActiveRecord::Base.connection_pool.clear_reloadable_connections!

Furthermore, you can put these lines in ~/.irbrc file, so that each time you don’t need to manually write these 2 lines:

require 'rubygems'

if ENV.include?('RAILS_ENV') && ENV["RAILS_ENV"] == 'development'
    ActiveRecord::Base.logger = Logger.new(STDOUT)
    ActiveRecord::Base.connection_pool.clear_reloadable_connections!
end

Hope this helps…