bullet 检查N+1查询问题

1、安装

gem install bullet  
#或者加入 Gemfile
group :development do  
  gem 'bullet', '~> 5.6.0'
end

2、配置

#config/environments/development.rb

config.after_initialize do    
  Bullet.enable = true    
  Bullet.alert = true    
  Bullet.bullet_logger = true    
  Bullet.console = true  
end