Clark caok

gem 'delayed_job_active_record'
bundle install

rails generate delayed_job:active_record
rake db:migrate

Rails 3 Mailers

gem "paperclip", "~> 4.2"

paperclip

class User < ActiveRecord::Base
  has_attached_file :avatar, :styles => { :medium => "300x300>", :thumb => "100x100>" }, :default_url => "/images/:style/missing.png"
  validates_attachment_content_type :avatar, :content_type => /\Aimage\/.*\Z/
end

rails generate devise:install
rails rails generate devise MODEL
rake db:migrate
rails generate devise:views
rails generate devise:controllers [scope]

you need to set up the default URL options for the Devise mailer in each environment. Here is a possible configuration for config/environments/development.rb:

config.action_mailer.default_url_options = { host: 'localhost', port: 3000 }

安装

sudo apt-get install postgresql
sudo apt-get install libpq-dev
# for hstore
sudo apt-get install postgresql-contrib

安装9.5

更新源

sudo apt-get update

安装系统包

sudo apt-get -y install git-core curl exuberant-ctags vim autoconf automake openssl \
  build-essential libc6-dev libreadline6 libreadline6-dev zlib1g zlib1g-dev libssl-dev libyaml-dev \
  mysql-server libmysqlclient-dev libsqlite3-0 libsqlite3-dev sqlite3 \

	第1列分钟1～59
	第2列小时1～23（0表示子夜）
	第3列日1～31
	第4列月1～12
	第5列星期0～6（0表示星期天）
	第6列要运行的命令

	下面是crontab的格式：
	分时日月星期要运行的命令

	namespace :chideo do
	namespace :votes do
	desc "Import votes via the existing API and import into the database"
	task import: :environment do

	Rake::Task["chideo:votes:generate_seed_file"].invoke
	Rake::Task["chideo:votes:import_seed_file"].invoke
	end

	desc "Generate votes seed file"

	# Puma
	# ==============================================================================
	namespace :puma do
	set :puma_pid, "#{app_path}/tmp/pids/puma.pid"
	set :start_puma, %{
	cd #{app_path}
	bundle exec puma --config #{app_path}/config/puma.rb --environment #{rails_env}
	}

	# Start task

	统计某文件夹下文件的个数
	ls -l \|grep "^-"\|wc -l

	统计某文件夹下目录的个数
	ls -l \|grep "^ｄ"\|wc -l

	统计文件夹下文件的个数，包括子文件夹里的
	ls -lR\|grep "^-"\|wc -l

	假如在一个目录中保留最近30天的文件，30天前的文件自动删除

	before_save :encrypt_note
	def encrypt_note
	salt = SecureRandom.random_bytes(64)
	key = encrypt_key \|\| ActiveSupport::KeyGenerator.new(ENV["SECRET_KEY"]).generate_key(salt)
	crypt = ActiveSupport::MessageEncryptor.new(key)

	%w(client_note food medicines hydration md_appointments activity mood positive_thinking positive_action listener_note).each_with_index do \|att\|

	val = if !new_record? and send("#{att}_changed?")
	read_attribute(att.to_sym)