Capistrano 部署时没有生成 current 目录是什么原因？

hanhor — Mon, 11 Mar 2013 12:12:27 +0800

各位好，最近有个小项目，参考 railscasts 以及 @happypeter 的 happycasts.net 上面讲的方法，部署在局域网内的一台机器上面。在执行 cap deploy:check 时，没有发现报错，然后执行 cap deploy:setup ，登录服务器上 apps 下项目的目录查看，只有 releases 和 shared 目录，没有 currrent 目录，其中 releases 目录为空， shared/cached-copy/ 目录中有项目的代码. 以下是 deploy.rb 的代码：

require "bundler/capistrano"

server "192.168.1.111", :web, :app, :db, primary: true
set :application, "tick"
set :user, "deployer"
set :deploy_to, "/home/#{user}/apps/#{application}"
set :deploy_via, :remote_cache
set :use_sudo, false
set :scm, "git"
set :repository, "git@github.com:HorX/#{application}.git"
set :branch, "master"
default_run_options[:pty] = true

after "deploy", "deploy:cleanup" # keep only the last 5 releases

namespace :deploy do
  %w[start stop restart].each do |command|
    desc "#{command} unicorn server"
    task command, roles: :app, except: {no_release: true} do
      run "/etc/init.d/unicorn_#{application} #{command}"
    end
  end

  task :setup_config, roles: :app do
    sudo "ln -nfs #{current_path}/config/nginx.conf /etc/nginx/sites-enabled/#{application}"
    sudo "ln -nfs #{current_path}/config/unicorn_init.sh /etc/init.d/unicorn_#{application}"
    run "mkdir -p #{shared_path}/config"
    put File.read("config/database.example.yml"), "#{shared_path}/config/database.yml"
    puts "Now edit the config files in #{shared_path}."
  end
  after "deploy:setup", "deploy:setup_config"

  task :symlink_config, roles: :app do
    run "ln -nfs #{shared_path}/config/database.yml #{release_path}/config/database.yml"
  end
  after "deploy:finalize_update", "deploy:symlink_config"

  desc "Make sure local git is in sync with remote."
  task :check_revision, roles: :web do
    unless `git rev-parse HEAD` == `git rev-parse origin/master`
      puts "WARNING: HEAD is not the same as origin/master"
      puts "Run `git push` to sync changes."
      exit
    end
  end
  before "deploy", "deploy:check_revision"

end

这个项目是放在 github 上面的私有项目，从局域网内的服务器可以 clone github 上的这个项目。

尝试在执行 cap deploy 时发现最终报错如下

failed: "sh -c 'cd /home/deployer/apps/tick/releases/20130311041014 && bundle install --gemfile /home/deployer/apps/tick/releases/20130311041014/Gemfile --path /home/deployer/apps/tick/shared/bundle --deployment --quiet --without development test'" on 192.168.1.111

折腾了很久了，还是没找出原因，求助各位帮帮忙，谢谢～

求助:rails 3.26 生成 model 自动生成 attr_accessible 的问题

hanhor — Fri, 06 Jul 2012 09:55:19 +0800

RT，学习 @Terry老师在http://railscasts-china.com 的视频教程时，我电脑使用的 rails 版本: rails -v:Rails 3.2.6,每次生产一个 model 时。都会在 model 中自动加上 attr_accessible，现在用 omniauth 时，出现了这个问题，代码是这样的，

class User < ActiveRecord::Base
  attr_accessible :email, :nickname
  validates :nickname, :presence => true
  validates :email, :presence => true, :uniqueness => true
  has_many :authentications
  has_many :posts

  accepts_nested_attributes_for :authentications

  def add_auth(auth)
    authentications.create(:provider => auth[:provider],
      :uid => auth[:uid])
  end

  class << self
    def from_auth(auth)
      locate_auth(auth) || locate_email(auth) || create_auth(auth)
    end

    def locate_auth(auth)
      Authentication.find_by_provider_and_uid(auth[:provider],
                                              auth[:uid]).try(:user)
    end

    def locate_email(auth)
      user = find_by_email(auth[:info][:email])
      return unless user
      user.add_auth(auth)
      user
    end

    def create_auth(auth)
      create!(
        :nickname => auth[:info][:nickname],
        :email => auth[:info][:email],
        :authentications_attributes => [
          Authentication.new(:provider => auth[:provider],
                             :uid => auth[:uid]
                            ).attributes
      ])

    end
  end
end

代码是视频教程中 @Terry老师的，我自己手动打出来的。第二行attr_accessible :email, :nickname是生成这个 model 时自己生成的. 现在我访问http://127.0.0.1:3000/auth/github/ 或者http://127.0.0.1:3000/auth/identity/register 时，都会报这个错误：

ActiveModel::MassAssignmentSecurity::Error in SessionsController#create

Can't mass-assign protected attributes: authentications_attributes

其中 SessionsController 中的代码是这样的：

class SessionsController < ApplicationController
  def create
    user = User.from_auth(request.env['omniauth.auth'])
    session[:user_id] = user.id
    flash[:notice] = "Welcome #{user.nickname}"
    redirect_to posts_path
  end

  def new
    flash[:failure_provider] = request.env['omniauth.error.strategy'].name
    flash[:failure_type] = request.env['omniauth.error.type']
  end
end

. 自己尝试这样解决: 将authentications_attributes也加在user_model 的 attr_accessible :email, :nickname中，即 attr_accessible :email, :nickname, :authentications_attributes,这时，又报错

ActiveModel::MassAssignmentSecurity::Error in SessionsController#create

Can't mass-assign protected attributes: created_at, updated_at

发到这里，恳请各位帮忙下。谢谢~

hanhor (HorX)

Capistrano 部署时没有生成 current 目录是什么原因？

求助:rails 3.26 生成 model 自动生成 attr_accessible 的问题