Lograge::Sql is an extension to the famous Lograge gem, which adds SQL queries to the Lograge Event and disable default ActiveRecord logging. This is extremely useful if you're using Lograge together with the ELK stack.

Add this line to your application's Gemfile:

gem 'lograge-sql'

In order to enable SQL logging in your application, you'll simply need to add this on top of your lograge initializer:

# config/initializers/lograge
require 'lograge/sql/extension'

By default, the format is a string concatenation of the query name, the query duration and the query itself joined by \n newline:

method=GET path=/mypath format=html ...
Object Load (0.42) SELECT "objects.*" FROM "objects"
Associations Load (0.42) SELECT "associations.*" FROM "associations" WHERE "associations"."object_id" = "$1"

However, having Lograge::Formatters::Json.new, the relevant output is

{
    "sql_queries": "name1 ({duration1}) {query1}\nname2 ({duration2}) query2 ...",
    "sql_queries_count": 3
}

To customize the output:

# config/initializers/lograge.rb
Rails.application.configure do

  # Instead of extracting event as Strings, extract as Hash. You can also extract
  # additional fields to add to the formatter
  config.lograge_sql.extract_event = Proc.new do |event|
    { name: event.payload[:name], duration: event.duration.to_f.round(2), sql: event.payload[:sql] }
  end
  # Format the array of extracted events
  config.lograge_sql.formatter = Proc.new do |sql_queries|
    sql_queries
  end
end

Depending on the web server in your project you might benefit from improved thread-safety by adding request_store to your Gemfile. It will be automatically picked up by lograge-sql.

Bug reports and pull requests are welcome on GitHub at https://github.com/iMacTia/lograge-sql.