ActiveRecordQueryCount is a Ruby gem designed to help you track and analyze SQL queries executed by your ActiveRecord models. By subscribing to ActiveSupport notifications, it provides detailed insights into the queries being run, including the tables involved and the locations in your code where the queries are generated. There are three things this gem allows you to do

1. You can compare two codes to view the difference in SQL counts on locations with a graph or a table.
2. You can view an overview of the SQL that a code does in a graph, a table or in the console.
3. (In progress) You can see an overview of the current request on a controller action

Add this line to your application's Gemfile:

gem 'active_record_query_count'

And then execute:

bundle install

Or install it yourself as:

gem install active_record_query_count

There are four ways of using this gem:

1. With a block of code

require 'active_record_query_count'
ActiveRecordQueryCount.start_with_block(printer: :html) do
    # your code goes here
end

this will open up a html table with the SQL stats of your code

2. Starting recording manually

require 'active_record_query_count'

ActiveRecordQueryCount.start_recording
# your code goes here
ActiveRecordQueryCount.end_recording(printer: :html)

3. Comparing two blocks of code (only available for html printer)

require 'active_record_query_count'
ActiveRecordQueryCount.compare do |bench|
    bench.code('script1') do
    end
    bench.code('script2') do
    end
    bench.compare!
end

this will open up a graph comparing the quantity of SQL of the two codes

4. (In progress) Enabling a middleware to see an overview of the current request SQL's in Rack Application. On config/development.rb or the initializer of the application.

  config.after_initialize do
    ActiveRecordQueryCount.configure do |configuration|
      configuration.enable_middleware = true
    end
  end

There are two ways of displaying the collected queries data, :console and :html, to select one pass the printer argument to start_with_block o end_recording methods.

If you use html with WSL enviroment, you need to set on your enviroments variables the WSL_DISTRIBUTION that you are using, so the dependency Launchy work as expected.

When visualizing the html table or the console output, tables with less than ignore_table_count will not be shown. Also, the ammount of locations to show is given by max_locations_per_table

config.after_initialize do
    ActiveRecordQueryCount.configure do |configuration|
      configuration.ignore_table_count = 1
      configuration.max_locations_per_table = 4
    end
  end
end

1. Console output
2. HTML output
3. Bar chart output

After checking out the repo, run bin/setup to install dependencies. Then, run rake test to run the tests.

To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and the created tag, and push the .gem file to rubygems.org.

Bug reports and pull requests are welcome on GitHub at https://github.com/[USERNAME]/active_record_query_count. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the code of conduct.

The gem is available as open source under the terms of the MIT License.

Everyone interacting in the ActiveRecordQueryCount project's codebases, issue trackers, chat rooms and mailing lists is expected to follow the code of conduct.