module YourApp
  class Logger < Ougai::Logger
    include ActiveSupport::LoggerThreadSafeLevel
    include LoggerSilence
    def initialize(*args)
      super
      after_initialize if respond_to?(:after_initialize) && ActiveSupport::VERSION::MAJOR < 6
    end
    def create_formatter
      if Rails.env.development? || Rails.env.test?
        Ougai::Formatters::Readable.new
      else
        Ougai::Formatters::Bunyan.new
      end
    end
  end
end

Rails.application.configure do
  ...
  config.logger = YourApp::Logger.new(STDOUT)
end

Rails.application.configure do
  ...
  if ENV["RAILS_LOG_TO_STDOUT"].present?
    config.logger = YourApp::Logger.new(STDOUT)
  else
    config.logger = YourApp::Logger.new(config.paths['log'].first)
  end
end

Rails.application.configure do
  config.lograge.enabled = true
  config.lograge.formatter = Class.new do |fmt|
    def fmt.call(data)
      { msg: 'Request', request: data }
    end
  end
end

class ApplicationController < ActionController::Base
  protect_from_forgery with: :exception
  def hello
    logger.debug 'Call action', somefield: 'somevalue'
    render plain: 'Hello!'
  end
end

Rails.application.configure do
  ...
  module ActiveSupport::TaggedLogging::Formatter
    def call(severity, time, progname, data)
      data = { msg: data.to_s } unless data.is_a?(Hash)
      tags = current_tags
      data[:tags] = tags if tags.present?
      _call(severity, time, progname, data)
    end
  end
  config.logger = ActiveSupport::TaggedLogging.new(YourApp::Logger.new(STDOUT))
end