ARのオブジェクトを生成しているところがどこか探すコード

application_record.rb

class ApplicationRecord < ActiveRecord::Base
  @ar_initialize_counter = Hash.new(0)
  @ar_find_counter = Hash.new(0)

  after_initialize :count_initialize

  def count_initialize
    return unless ApplicationRecord.enable_counter?
    gems_paths = (Gem.path | [Gem.default_dir]).map { |p| Regexp.escape(p) }
    caller_in_app = caller.find { |file_and_lineno| file_and_lineno !~ gems_paths}
    ApplicationRecord.instance_variable_get(:@ar_initialize_counter)[caller_in_app] += 1
  end

  after_find :count_find

  def count_find
    return unless ApplicationRecord.enable_counter?
    gems_paths = (Gem.path | [Gem.default_dir]).map { |p| Regexp.escape(p) }
    caller_in_app = caller.find { |file_and_lineno| !gems_paths.any? { |gem_path| file_and_lineno.match?(gem_path) } }
    ApplicationRecord.instance_variable_get(:@ar_find_counter)[caller_in_app] += 1
  end

  def self.enable_counter?
    @enable_counter
  end

  def self.enable_counter
    @enable_counter = true
  end

  def self.disable_counter
    @enable_counter = false
  end

  def self.log_counter
    File.open('hoge.log', 'w') do |file|
      file.puts 'ar_initialize_counter'
      file.write @ar_initialize_counter.inspect
      file.puts 'ar_find_counter'
      file.write @ar_find_counter.inspect
    end
  end

  def self.reset_counter
    @ar_initialize_counter = Hash.new(0)
    @ar_find_counter = Hash.new(0)
  end
end