#5 楼 @zj0713001 我看了下测试，不是Object.name，ActiveSupport::Autoload.name # "ActiveSupport::Autoload"，但是我不会 binding，不知道 binding 意思

module MyLib
  extend ActiveSupport::Autoload
  autoload :Model

  eager_autoload do
    autoload :Cache
  end
end
MyLib.name # => "MyLib"

test "the location of autoloaded constants defaults to :name.underscore" do
  module ::Fixtures::Autoload
    autoload :SomeClass
  end

  assert !$LOADED_FEATURES.include?(@some_class_path)
  assert_nothing_raised { ::Fixtures::Autoload::SomeClass }
end

test "the location of :eager autoloaded constants defaults to :name.underscore" do
  module ::Fixtures::Autoload
    eager_autoload do
      autoload :SomeClass
    end
  end

  assert !$LOADED_FEATURES.include?(@some_class_path)
  ::Fixtures::Autoload.eager_load!
  assert $LOADED_FEATURES.include?(@some_class_path)
  assert_nothing_raised { ::Fixtures::Autoload::SomeClass }
end

自动生产 migration，model，controller，view 等的模板文件，通常继承Rails::Generator::NamedBase或者Rails::Generator::Base https://github.com/rails/rails/tree/master/railties/lib/rails/generators

#12 楼 @chairy11 部署到一台服务器一般不用写 server 那部分 server 'xxx', user: 'root', roles: %w{web app}, my_property: :my_value 就可以了

地址是你本机的私钥地址

# server 'example.com',
#   user: 'user_name',
#   roles: %w{web app},
#   ssh_options: {
#     user: 'user_name', # overrides user setting above
#     keys: %w(/home/user_name/.ssh/id_rsa),
#     forward_agent: false,
#     auth_methods: %w(publickey password)
#     # password: 'please use keys'
#   }

～/.ssh/config

Host bitbucket.org
  User flowerwrong
    Hostname bitbucket.org
    PreferredAuthentications publickey
    IdentityFile ~/.ssh/id_rsa_bitbucket

Host github.com
  User flowerwrong
    Hostname github.com
    PreferredAuthentications publickey
    IdentityFile ~/.ssh/id_rsa_github

Host ip
  IdentityFile ~/.ssh/id_rsa_xx

require 'capistrano/setup'
require 'capistrano/deploy'

require 'capistrano/rvm' # 看下是不是没有加入rvm
# require 'capistrano/rbenv'
# require 'capistrano/chruby'
require 'capistrano/bundler'
require 'capistrano/rails/assets'
require 'capistrano/rails/migrations'

Dir.glob('lib/capistrano/tasks/*.rake').each { |r| import r }

手动git pull最新代码 不用，cap production deploy:check 会创建基础环境，过后cap production deploy 要不先玩这个 demo 吧 [email protected]:FlowerWrong/capdemo.git

# https://github.com/FlowerWrong/capdemo/blob/master/config/deploy.rb
set :deploy_to, '/home/ubuntu/www/capdemo'

# https://github.com/FlowerWrong/capdemo/blob/master/config/deploy/production.rb
role :app, %w{ubuntu@xxx}
role :web, %w{ubuntu@xxx}
role :db, %w{ubuntu@2xxx}
# Extended Server Syntax
# ======================
# This can be used to drop a more detailed server definition into the
# server list. The second argument is a, or duck-types, Hash and is
# used to set extended properties on the server.
server 'xxx', user: 'ubuntu', roles: %w{web app}, my_property: :my_value

昨天听你说你的 gemfile.lock 里面 cap 是 2，你把他删掉，重新重新 bundle install 试下

rm Gemfile.lock
bundle install

[email protected]:FlowerWrong/capdemo.git

Engine is a gem. Rails is also a gem with many dependency gem.

To see demonstrations of other engines, check out Devise, an engine that provides authentication for its parent applications, or Forem, an engine that provides forum functionality. There's also Spree which provides an e-commerce platform, and RefineryCMS, a CMS engine.

换句话说，engine 更像一个模块。

建议先学习配置 ssh 连接自己服务器，github，bitbucket. 再回头就简单多了。

可以的，但推荐新建 migration 第二个问题：先rake db:drop

问题 1：你的本地工作环境中就可以，至于development还是test，或者tools，无所谓，他只是一个cli程序， 在 3 里面，cap production deploy默认就是在rails的production环境下执行命令。

问题 2： require: false就是不加载进入 rails 内部，也就是你不能在 rails 里面的文件里面直接用他或者没必要用它。

问题 3：不知道了。

capistrano (3.2.1)
  i18n
  rake (>= 10.0.0)
  sshkit (~> 1.3)
capistrano-bundler (1.1.3)
  capistrano (~> 3.1)
  sshkit (~> 1.2)
capistrano-rails (1.1.2)
  capistrano (~> 3.1)
  capistrano-bundler (~> 1.1)
capistrano-rvm (0.1.2)
  capistrano (~> 3.0)
  sshkit (~> 1.2)

这图片不行 http://rubygems.org/red.jpg

:sym 比 'sym' 看起来爽

get '*path1/*path2/*path3' => 'pages#unknown' 我确实没有更好的解决办法了

看到 https://github.com/qhwa/huaban_exporter/blob/master/hb_exporter.gemspec#L9 有种醉了的感觉，

#2 楼 @bianlimit 和 rails 没关系，你应该学习 html , css , javascript

<div class="">
  <div class="a"></div>
  <div class="b"></div>
  <div class="c"></div>
</div>

http://guides.rubyonrails.org/routing.html get '*path' => 'pages#unknown' 这个勉强符合需求，更好的我自己也没有发现. 例如我新建了一个 about 页面，在 page 这个 model 里面，那么我想他的路由是 pages/about，在 unknown action 里面我查找 about 这个关键字，返回 page model.

# routes.rb
get '*path' => 'pages#unknown'

# page_controller.rb
class PageController < ApplicationController
  def unknown
    @element = find_by_title(params[:path])
  end
end

http://stackoverflow.com/questions/18481458/dynamic-routes-on-runtime-in-rails

模型1
class Course < ActiveRecord::Base
    has_many :datums # not datum
end

#1 楼 @Rei good!

按照这个来 https://github.com/carrierwaveuploader/carrierwave#installation

http://api.jquery.com/focus/ http://api.jquery.com/blur/ http://api.jquery.com/jQuery.ajax/

......

namespace :admin do
  resources :posts, :comments
end
# 对应controller在controller/admin/xxx_controller.rb

scope '/admin' do
  resources :posts, :comments
end
# 对应controller在controller/xxx_controller.rb

就是多了一个 admin 空间，看你自己的需求了。 我一般配合 cancancan，就用第二种。

Akira Matsuda

黄家驹

#6 楼 @lgn21st thx

#1 楼 @Peter 能云一份不？云梯连不上。

参考新浪微博，微信 api 的设计

#3 楼 @flowerwrong

"Ruby": {
    "ruby": "~/.rvm/rubies/default",
    "rubyExtraPaths": ["~/.rvm/gems/ruby-2.1.4"]
}

ubuntu 14.04 work for me

参考 http://hyperneetprogrammer.hatenablog.com/entry/2014/09/14/001053 maybe help

"Ruby": {
    "ruby": "~/.rvm/rubies/default",
    "rubyExtraPaths": ["~/.rvm/gems/ruby-2.1.1"]
}