#1 楼 @blacktulip 听起来很高端的样子，我想想哈……

#8 楼 @chenge #6 楼 @themorecolor #4 楼 @Rei 发现我的这个项目竟然内置了 gem 'responders'，不过我又单独在 gemfile 里声明了，免得下次升级时就找不到它了…… 决定用 respond_with 版本，因为我看到个帖子respond_to Without All the Pain，感觉的确不错

#8 楼 @chenge 有些地方简短了，有些也多了啊！比如：

# 旧
def index
    @projects = Project.all
end

# 新
def index
    @tries = Try.all
    # 非要这样声明结果么？
    respond_with(@tries)
end

话说，到底哪种才是最好的用法？

#6 楼 @themorecolor #8 楼 @chenge

我以为这个 respond_with 是新式用法，可是昨天查官方 Guide 也没看到，要不我还是用回之前的那款 respond_to 好了……

respond_to do |format|
      format.html { redirect_to projects_url, notice: 'Project was successfully destroyed.' }
      format.json { head :no_content }
    end

#4 楼 @Rei 我明明记得我那旧项目一开始就是用的 Rails4.2.0…… 本来我用 4.1.8 写了一部分，后来我看到 4.2 出了，就直接 rails new project，用的就是 4.2，没升级…… 哎呀呀，真的很诡异……

#1 楼 @Rei 尼玛，好吓人！我在这个项目生成的 scaffold 得到的 controller 依然是这些 respond_with!

class TriesController < ApplicationController
  before_action :set_try, only: [:show, :edit, :update, :destroy]

  respond_to :html

  def index
    @tries = Try.all
    respond_with(@tries)
  end

  def show
    respond_with(@try)
  end

  def new
    @try = Try.new
    respond_with(@try)
  end

  def edit
  end

  def create
    @try = Try.new(try_params)
    @try.save
    respond_with(@try)
  end

  def update
    @try.update(try_params)
    respond_with(@try)
  end

  def destroy
    @try.destroy
    respond_with(@try)
  end

  private
    def set_try
      @try = Try.find(params[:id])
    end

    def try_params
      params.require(:try).permit(:try1, :try2)
    end
end

#1 楼 @Rei 我的妈呀！太神奇了！这下我也不明白了！我刚刚 rails new 新建了个项目，生成的 scaffold 也是

class ProjectsController < ApplicationController
  before_action :set_project, only: [:show, :edit, :update, :destroy]

  # GET /projects
  # GET /projects.json
  def index
    @projects = Project.all
  end

  # GET /projects/1
  # GET /projects/1.json
  def show
  end

  # GET /projects/new
  def new
    @project = Project.new
  end

  # GET /projects/1/edit
  def edit
  end

  # POST /projects
  # POST /projects.json
  def create
    @project = Project.new(project_params)

    respond_to do |format|
      if @project.save
        format.html { redirect_to @project, notice: 'Project was successfully created.' }
        format.json { render :show, status: :created, location: @project }
      else
        format.html { render :new }
        format.json { render json: @project.errors, status: :unprocessable_entity }
      end
    end
  end

  # PATCH/PUT /projects/1
  # PATCH/PUT /projects/1.json
  def update
    respond_to do |format|
      if @project.update(project_params)
        format.html { redirect_to @project, notice: 'Project was successfully updated.' }
        format.json { render :show, status: :ok, location: @project }
      else
        format.html { render :edit }
        format.json { render json: @project.errors, status: :unprocessable_entity }
      end
    end
  end

  # DELETE /projects/1
  # DELETE /projects/1.json
  def destroy
    @project.destroy
    respond_to do |format|
      format.html { redirect_to projects_url, notice: 'Project was successfully destroyed.' }
      format.json { head :no_content }
    end
  end

  private
    # Use callbacks to share common setup or constraints between actions.
    def set_project
      @project = Project.find(params[:id])
    end

    # Never trust parameters from the scary internet, only allow the white list through.
    def project_params
      params.require(:project).permit(:backgroud, :result)
    end
end

不行，我要在我刚才那旧项目新建个 scaffold 试试，这简直灵异事件了！！！哪来的代码？！！！

#1 楼 @Rei 啊？那我的项目代码哪来的？我新建个项目试试……我明明都是用 scaffold 生成的啊！

#1 楼 @hz_qiuyuanxin #2 楼 @michael_roshen #3 楼 @gothic #4 楼 @JeskTop 好了，谢谢各位：）

请问，如果我在一个页面使用多个 textarea，也就是需要多个富文本编辑器，这时候会显示很奇怪的现象，怎么办？

#21 楼 @liujianhei 哦，谢谢，我消化一下……

#17 楼 @liujianhei

#1 楼 @Rei 我发现一个问题，手动执行 backup perform --trigger a_project 与 cron 自动执行输出结果差别：

[2015/01/12 23:57:32][warn]   Pipeline STDERR Messages:
[2015/01/12 23:57:32][warn]   (Note: may be interleaved if multiple commands returned error messages)
[2015/01/12 23:57:32][warn] 
[2015/01/12 23:57:32][warn]   Warning: Using a password on the command line interface can be insecure.

手动比 cron 执行多了一个密码的警句，看来的确是用户权限和密码问题。 但我手动时也没有附带密码啊，密码应该已经写在 backup 文件里的了啊！ 这应该修改哪里呢？

#17 楼 @liujianhei 恩，是这样，它执行了，也生成了相应的文件，就是文件内容为空，很奇怪。手动 backup 的话，这个文件就不会为空。

#18 楼 @hanluner 还是很感激啊，各种解决的可能方案都很重要啊！

#11 楼 @hanluner 是 centos，但你说的 tab 占位符，指的是哪个文件里的？

#9 楼 @liujianhei 唉，没看到什么有用的信息。还得得到空白的结果……

[2015/01/09 07:50:01][info] Performing Backup for 'xxx周报系统备份生成 (a_project)'!
[2015/01/09 07:50:01][info] [ backup 4.1.5 : ruby 2.2.0p0 (2014-12-25 revision 49005) [x86_64-linux] ]
[2015/01/09 07:50:01][info] Database::MySQL Started...
[2015/01/09 07:50:01][info] Using Compressor::Gzip for compression.
[2015/01/09 07:50:01][info]   Command: '/usr/bin/gzip'
[2015/01/09 07:50:01][info]   Ext: '.gz'
[2015/01/09 07:50:01][info] Database::MySQL Finished!
[2015/01/09 07:50:01][info] Packaging the backup files...
[2015/01/09 07:50:02][info] Packaging Complete!
[2015/01/09 07:50:02][info] Cleaning up the temporary files...
[2015/01/09 07:50:02][info] Storage::Local Started...
[2015/01/09 07:50:02][info] Storing '/root/backups/a_project/2015.01.09.07.50.01/a_project.tar'...
[2015/01/09 07:50:02][info] Cycling Started...
[2015/01/09 07:50:02][info] Removing backup package dated 2014.12.28.11.00.02...
[2015/01/09 07:50:02][info] Storage::Local Finished!
[2015/01/09 07:50:02][info] Cleaning up the package files...
[2015/01/10 07:50:02][info] Performing Backup for 'xxx周报系统备份生成 (a_project)'!
[2015/01/10 07:50:02][info] [ backup 4.1.5 : ruby 2.2.0p0 (2014-12-25 revision 49005) [x86_64-linux] ]
[2015/01/10 07:50:02][info] Database::MySQL Started...
[2015/01/10 07:50:02][info] Using Compressor::Gzip for compression.
[2015/01/10 07:50:02][info]   Command: '/usr/bin/gzip'
[2015/01/10 07:50:02][info]   Ext: '.gz'
[2015/01/10 07:50:02][info] Database::MySQL Finished!
[2015/01/10 07:50:02][info] Packaging the backup files...
[2015/01/10 07:50:02][info] Packaging Complete!
[2015/01/10 07:50:02][info] Cleaning up the temporary files...
[2015/01/10 07:50:02][info] Storage::Local Started...
[2015/01/10 07:50:02][info] Storing '/root/backups/a_project/2015.01.10.07.50.02/a_project.tar'...
[2015/01/10 07:50:02][info] Cycling Started...
[2015/01/10 07:50:02][info] Removing backup package dated 2014.12.30.11.00.02...
[2015/01/10 07:50:02][info] Storage::Local Finished!
[2015/01/10 07:50:02][info] Cleaning up the package files...
[2015/01/11 07:50:02][info] Performing Backup for 'xxx周报系统备份生成 (a_project)'!
[2015/01/11 07:50:02][info] [ backup 4.1.5 : ruby 2.2.0p0 (2014-12-25 revision 49005) [x86_64-linux] ]
[2015/01/11 07:50:02][info] Database::MySQL Started...
[2015/01/11 07:50:02][info] Using Compressor::Gzip for compression.
[2015/01/11 07:50:02][info]   Command: '/usr/bin/gzip'
[2015/01/11 07:50:02][info]   Ext: '.gz'
[2015/01/11 07:50:02][info] Database::MySQL Finished!
[2015/01/11 07:50:02][info] Packaging the backup files...
[2015/01/11 07:50:02][info] Packaging Complete!
[2015/01/11 07:50:02][info] Cleaning up the temporary files...
[2015/01/11 07:50:02][info] Storage::Local Started...
[2015/01/11 07:50:02][info] Storing '/root/backups/a_project/2015.01.11.07.50.02/a_project.tar'...
"/tmp/cron.log" 48L, 3162C

#7 楼 @liujianhei 噢，这是 UTC 时间吧？还得等……我今天折腾不下去了，各种 bug 各种坑……下周再看好了…… 谢谢啊……周末愉快啊……

#5 楼 @liujianhei 哭……看不懂你这“50 15 * * * ”指的是几点？是不是已经过了？

#2 楼 @liujianhei 你意思是在 whenever 的设置里改吗？ 改成这样吗？

every 1.day, :at => '19:00' do
  command "backup perform --trigger a_project"
  set :output, "/tmp/cron.log"
end

那一天才备份一次，我得明天才能检查结果哦……

#1 楼 @Rei 没明白你的意思耶…… 我之前的设想是：

1. 对于整个服务器，设置一个非 root 的超级用户，用来部署。
2. 对于 mysql，设置一个非 root 的超级用户，用来项目交互。

结果是：

1. 对于整个服务器，我创建的用户总是受到各种限制（sudoer 没成功吧），我觉得麻烦，就一直用 root 了。
2. 对于 mysql，超级用户创建成功，所以我一直用 bibi 这个用户名。

所以：

1. 你说的切换 root 用户，指的是服务器的用户，还是 mysql 的用户？
2. crontab 静默退出，那它为什么能每天生成一个表面正确的备份的？ 比如，它会在目录下生成 2015.01.08.19.29.54/a_project.tar， 解压之后，里面是 weekly_report/databases/MySQL.sql.gz，再解压得到一个 MySQL.sql。 只是手动备份时，里面是有内容的。自动备份时，里面是空白的。但它生成了这个文件耶……
   
3. 你说的退出再登录，是指退出什么啊？我平时用 ssh [email protected]，直接登录（设置了 ssh key），不用密码的。 crontab 在服务器本身，backup 文件里有 mysql 密码，它还需要什么啊？

#11 楼 @blacktulip 谢谢啦：）

#11 楼 @blacktulip 哦，那我改回 80 算了。我以为新开个端口会更好……

#9 楼 @blacktulip 因为 80 好像有别的很多服务在用……要不我改回 80 试试？

#7 楼 @blacktulip 我监听的是 8888 端口，但我希望我输入的时候只输入 week.a.com 就能跳到我的这个 8888 端口，不可以的么？

#5 楼 @blacktulip 不啊，IP 的话还是要用端口啊……

#3 楼 @blacktulip 重启过了。要不我再试一次看看。

#1 楼 @blacktulip 他们说已经把“week.a.com 指向了这个 IP , xxx.xxx.xxx.xxx，没带端口的。我这个会少什么吗？

#11 楼 @appell 哦，原来可以对应不同版本，我明天再试试。今天折腾崩溃了。谢谢哦：）

#11 楼 @appell 下午设置过 passenger_root, passenger_ruby，还是不行，貌似已经安装的 passenger 有它能对应的 ruby 版本？ 现在感觉问题好像又出在 gemset 上了，明天再接着折腾……哎呀呀，莫名其妙啊……

#5 楼 @flowerwrong 额，装完了新 passenger，还是没解决。

#5 楼 @flowerwrong 看蒙我了 …… 我看了看 nginx 的 error 日志，怀疑是不是因为我上个项目用的是 ruby-2.1.2，这个项目用的是 ruby-2.2.0, （而且我连 rvm 都升级了），然后之前的 passenger 装在 rvm/gems/ruby-2.1.2/gems 里，所以它找不到要用的 passenger……

要不我再装个 passenger 看看……

[ 2015-01-05 02:56:09.7061 29783/7f54445d6700 Pool2/Implementation.cpp:287 ]: Could not spawn process for application /var/www/b_project/current: An error occured while starting up the preloader.
  Error ID: 9ad6e2b0
  Error details saved to: /tmp/passenger-error-3qukEK.html
  Message from application: <p>It looks like Bundler could not find a gem. Maybe you didn't install all the gems that this application needs. To install your gems, please run:</p>

  <pre class="commands">bundle install</pre>

<p>If that didn't work, then maybe the problem is that your gems are installed to <code>//.rvm/gems</code>, while at the same time you set <code>PassengerRuby</code> (Apache) or <code>passenger_ruby</code> (Nginx) to <code>/usr/local/rvm/gems/ruby-2.1.2/wrappers/ruby</code>. Because of the latter, RVM does not load gems from the home directory.</p>

<p>To make RVM load gems from the home directory, you need to set <code>PassengerRuby</code>/<code>passenger_ruby</code> to an RVM wrapper script inside the home directory:</p>

<ol>
  <li>Login as nobody.</li>
  <li>Enable RVM mixed mode by running:
      <pre class="commands">rvm user gemsets</pre></li>
  <li>Run this to find out what to set <code>PassengerRuby</code>/<code>passenger_ruby</code> to:
      <pre class="commands">/usr/local/rvm/gems/ruby-2.1.2/wrappers/ruby \
/usr/local/rvm/gems/ruby-2.1.2/gems/passenger-4.0.53/bin/passenger-config --detect-ruby</pre></li>
</ol>

<p>If that didn't help either, then maybe your application is being run under a different environment than it's supposed to. Please check the following:</p>

<ol>
  <li>Is this app supposed to be run as the <code>nobody</code> user?</li>
  <li>Is this app being run on the correct Ruby interpreter? Below you will
      see which Ruby interpreter Phusion Passenger attempted to use.</li>
  <li>Please check whether the correct RVM gemset is being used.</li>
  <li>Sometimes, RVM gemsets may be broken.
      <a href="https://github.com/phusion/passenger/wiki/Resetting-RVM-gemsets">Try resetting them.</a></li>
</ol>

<p>-------- The exception is as follows: -------</p>
Could not find rake-10.4.2 in any of the sources (Bundler::GemNotFound)
<pre>  /usr/local/rvm/gems/ruby-2.1.2/gems/bundler-1.7.6/lib/bundler/spec_set.rb:92:in `block in materialize&#39;
  /usr/local/rvm/gems/ruby-2.1.2/gems/bundler-1.7.6/lib/bundler/spec_set.rb:85:in `map!&#39;
  /usr/local/rvm/gems/ruby-2.1.2/gems/bundler-1.7.6/lib/bundler/spec_set.rb:85:in `materialize&#39;
  /usr/local/rvm/gems/ruby-2.1.2/gems/bundler-1.7.6/lib/bundler/definition.rb:132:in `specs&#39;
  /usr/local/rvm/gems/ruby-2.1.2/gems/bundler-1.7.6/lib/bundler/definition.rb:177:in `specs_for&#39;
  /usr/local/rvm/gems/ruby-2.1.2/gems/bundler-1.7.6/lib/bundler/definition.rb:166:in `requested_specs&#39;
  /usr/local/rvm/gems/ruby-2.1.2/gems/bundler-1.7.6/lib/bundler/environment.rb:18:in `requested_specs&#39;
  /usr/local/rvm/gems/ruby-2.1.2/gems/bundler-1.7.6/lib/bundler/runtime.rb:13:in `setup&#39;
  /usr/local/rvm/gems/ruby-2.1.2/gems/bundler-1.7.6/lib/bundler.rb:121:in `setup&#39;
  /usr/local/rvm/gems/ruby-2.1.2/gems/bundler-1.7.6/lib/bundler/setup.rb:17:in `&lt;top (required)&gt;&#39;
  /usr/local/rvm/rubies/ruby-2.1.2/lib/ruby/2.1.0/rubygems/core_ext/kernel_require.rb:135:in `require&#39;
  /usr/local/rvm/rubies/ruby-2.1.2/lib/ruby/2.1.0/rubygems/core_ext/kernel_require.rb:135:in `rescue in require&#39;
  /usr/local/rvm/rubies/ruby-2.1.2/lib/ruby/2.1.0/rubygems/core_ext/kernel_require.rb:144:in `require&#39;
  /usr/local/rvm/gems/ruby-2.1.2/gems/passenger-4.0.53/lib/phusion_passenger/loader_shared_helpers.rb:263:in `block in run_load_path_setup_code&#39;
  /usr/local/rvm/gems/ruby-2.1.2/gems/passenger-4.0.53/lib/phusion_passenger/loader_shared_helpers.rb:366:in `running_bundler&#39;
  /usr/local/rvm/gems/ruby-2.1.2/gems/passenger-4.0.53/lib/phusion_passenger/loader_shared_helpers.rb:261:in `run_load_path_setup_code&#39;
  /usr/local/rvm/gems/ruby-2.1.2/gems/passenger-4.0.53/helper-scripts/rack-preloader.rb:100:in `preload_app&#39;
  /usr/local/rvm/gems/ruby-2.1.2/gems/passenger-4.0.53/helper-scripts/rack-preloader.rb:158:in `&lt;module:App&gt;&#39;
  /usr/local/rvm/gems/ruby-2.1.2/gems/passenger-4.0.53/helper-scripts/rack-preloader.rb:29:in `&lt;module:PhusionPassenger&gt;&#39;
  /usr/local/rvm/gems/ruby-2.1.2/gems/passenger-4.0.53/helper-scripts/rack-preloader.rb:28:in `&lt;main&gt;&#39;</pre>


[ 2015-01-05 02:56:09.7123 29783/7f54421a7700 agents/HelperAgent/RequestHandler.h:2306 ]: [Client 41] Cannot checkout session because a spawning error occurred. The identifier of the error is 9ad6e2b0. Please see earlier logs for details about the error.