Rails 3.1:如何仅为 Web 应用程序运行初始化程序(rails server/unicorn/etc) [英] Rails 3.1: how to run an initializer only for the web app (rails server/unicorn/etc)

问题描述

我的 web 应用程序需要加密其会话数据.我的设置是:

config/initializers/encryptor.rb:需要'openssl'需要我的应用程序/加密器"MyApp::Encryptor.config[:random_key] = OpenSSL::Random.random_bytes(128)Session.delete_all应用程序/模型/session.rb:需要'attr_encrypted'课时proc { MyApp::Encryptor.config[ :random_key ] }, :marshal =>真的# 其余模型内容结尾

这一切都很好，并且保证了会话数据的安全.问题是:当我运行我的自定义 rake 任务时，它会加载初始化程序并清除所有会话.不好！<​​/p>

我可以在我的初始化程序中放入什么来确保它只为 webapp 初始化运行?或者，我可以在我的初始化程序中放入什么以使其不为 rake 任务运行?

更新: 好的，我目前所做的是添加 MYAPP_IN_RAKE = true 除非已定义?MYAPP_IN_RAKE 到我的 .rake 文件.然后在我的初始化程序中:

除非已定义?( MYAPP_IN_RAKE ) &&MYAPP_IN_RAKE# 仅 Web 初始化结尾

似乎有效.但我愿意接受其他建议.

解决方案

你可以像这样在 `config/application.rb' 中修改你的应用程序:

模块 MyAppdef self.rake?！！@耙结尾def self.rake=(值)@rake = !!值结尾

然后在您的 Rakefile 中添加:

MyApp.rake = true

最好使用方法而不是常量，因为有时您希望稍后更改或重新定义它们.另外，它们不会污染根命名空间.

这是一个示例 config/initializers/rake_environment_test.rb 脚本:

if (MyApp.rake?)把在耙子里"别的把不在耙子里"结尾

Rakefile 的可编程特性为您提供了极大的灵活性.

My webapp needs to encrypt its session data. What I setup is:

config/initializers/encryptor.rb:

require 'openssl'
require 'myapp/encryptor'

MyApp::Encryptor.config[ :random_key ] = OpenSSL::Random.random_bytes( 128 )
Session.delete_all

app/models/session.rb:

require 'attr_encrypted'

class Session < ActiveRecord::Base
  attr_accessible :session_id, :data
  attr_encryptor :data, :key => proc { MyApp::Encryptor.config[ :random_key ] }, :marshal => true

  # Rest of model stuff
end

That all works great, and keeps the session data secured. Here's the problem: when I run my custom rake tasks it loads the initializer and clears all the sessions. Not good!

What can I put in my initializer to make sure it ONLY runs for the webapp initialization? Or, what can I put in my initializer to make it NOT run for rake tasks?

Update: OK, what I've done for the moment is add MYAPP_IN_RAKE = true unless defined? MYAPP_IN_RAKE to my .rake file. And then in my initializer I do:

unless defined?( MYAPP_IN_RAKE ) && MYAPP_IN_RAKE
    # Web only initialization
end

Seems to work. But I'm open to other suggestions.

解决方案

You might make a modification to your application in `config/application.rb' like this:

module MyApp
  def self.rake?
    !!@rake
  end

  def self.rake=(value)
    @rake = !!value
  end

Then in your Rakefile you'd add this:

MyApp.rake = true

It's nice to use methods rather than constants since sometimes you'd prefer to change or redefine them later. Plus, they don't pollute the root namespace.

Here's a sample config/initializers/rake_environment_test.rb script:

if (MyApp.rake?)
  puts "In rake"
else
  puts "Not in rake"
end

The programmable nature of the Rakefile affords you significant flexibility.

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