Spork.prefork 正在加载 app/models/*

Question

我不知道如何让 spork 不加载我的所有应用程序模型。由于我无法使用 spork 来提供帮助，因此测试模型更改的速度大大减慢。这是我调试 spork 正在加载的内容时得到的结果：

    - Spork Diagnosis -
    -- Summary --
    app/models/account.rb
    app/models/admin.rb
    app/models/affiliate.rb
    app/models/app.rb
    app/models/application_server.rb
    app/models/domain_record.rb
    app/models/domain_zone.rb
    app/models/event.rb
    app/models/oid.rb
    app/models/user.rb
    config/application.rb
    config/boot.rb
    config/environment.rb
    config/environments/test.rb
    config/initializers/api_conversions.rb
    config/initializers/backtrace_silencers.rb
    config/initializers/compass.rb
    config/initializers/devise.rb
    config/initializers/hoptoad.rb
    config/initializers/inflections.rb
    config/initializers/mime_types.rb
    config/initializers/rspec_generator.rb
    config/initializers/secret_token.rb
    config/initializers/session_store.rb
    config/routes.rb
    lib/application_server_api.rb
    lib/oid_helper.rb
    lib/soa_record.rb
    spec/spec_helper.rb



    -- Detail --



    --- app/models/account.rb ---
    /Users/sean/.rvm/gems/ruby-1.9.2-p136/gems/activesupport-3.0.3/lib/active_support/dependencies.rb:239:in `block in require'
    /Users/sean/.rvm/gems/ruby-1.9.2-p136/gems/activesupport-3.0.3/lib/active_support/dependencies.rb:227:in `load_dependency'
    /Users/sean/.rvm/gems/ruby-1.9.2-p136/gems/activesupport-3.0.3/lib/active_support/dependencies.rb:239:in `require'
    /Users/sean/.rvm/gems/ruby-1.9.2-p136/gems/activesupport-3.0.3/lib/active_support/dependencies.rb:346:in `require_or_load'
    /Users/sean/.rvm/gems/ruby-1.9.2-p136/gems/activesupport-3.0.3/lib/active_support/dependencies.rb:300:in `depend_on'
    /Users/sean/.rvm/gems/ruby-1.9.2-p136/gems/activesupport-3.0.3/lib/active_support/dependencies.rb:216:in `require_dependency'
    /Users/sean/.rvm/gems/ruby-1.9.2-p136/gems/mongoid-2.0.0.rc.7/lib/rails/mongoid.rb:54:in `load_model'
    /Users/sean/.rvm/gems/ruby-1.9.2-p136/gems/mongoid-2.0.0.rc.7/lib/rails/mongoid.rb:17:in `block (2 levels) in load_models'
    /Users/sean/.rvm/gems/ruby-1.9.2-p136/gems/mongoid-2.0.0.rc.7/lib/rails/mongoid.rb:16:in `each'
    /Users/sean/.rvm/gems/ruby-1.9.2-p136/gems/mongoid-2.0.0.rc.7/lib/rails/mongoid.rb:16:in `block in load_models'
    /Users/sean/.rvm/gems/ruby-1.9.2-p136/gems/railties-3.0.3/lib/rails/paths.rb:102:in `block in each'
    /Users/sean/.rvm/gems/ruby-1.9.2-p136/gems/railties-3.0.3/lib/rails/paths.rb:102:in `each'
    /Users/sean/.rvm/gems/ruby-1.9.2-p136/gems/railties-3.0.3/lib/rails/paths.rb:102:in `each'
    /Users/sean/.rvm/gems/ruby-1.9.2-p136/gems/mongoid-2.0.0.rc.7/lib/rails/mongoid.rb:15:in `load_models'
    /Users/sean/.rvm/gems/ruby-1.9.2-p136/gems/mongoid-2.0.0.rc.7/lib/mongoid/railtie.rb:88:in `block (2 levels) in '
    /Users/sean/.rvm/gems/ruby-1.9.2-p136/gems/activesupport-3.0.3/lib/active_support/callbacks.rb:419:in `_run_prepare_callbacks'
    /Users/sean/.rvm/gems/ruby-1.9.2-p136/gems/actionpack-3.0.3/lib/action_dispatch/middleware/callbacks.rb:40:in `initialize'
    /Users/sean/.rvm/gems/ruby-1.9.2-p136/gems/actionpack-3.0.3/lib/action_dispatch/middleware/stack.rb:33:in `new'
    /Users/sean/.rvm/gems/ruby-1.9.2-p136/gems/actionpack-3.0.3/lib/action_dispatch/middleware/stack.rb:33:in `build'
    /Users/sean/.rvm/gems/ruby-1.9.2-p136/gems/actionpack-3.0.3/lib/action_dispatch/middleware/stack.rb:79:in `block in build'
    /Users/sean/.rvm/gems/ruby-1.9.2-p136/gems/actionpack-3.0.3/lib/action_dispatch/middleware/stack.rb:79:in `each'
    /Users/sean/.rvm/gems/ruby-1.9.2-p136/gems/actionpack-3.0.3/lib/action_dispatch/middleware/stack.rb:79:in `inject'
    /Users/sean/.rvm/gems/ruby-1.9.2-p136/gems/actionpack-3.0.3/lib/action_dispatch/middleware/stack.rb:79:in `build'
    /Users/sean/.rvm/gems/ruby-1.9.2-p136/gems/railties-3.0.3/lib/rails/application.rb:162:in `app'
    /Users/sean/.rvm/gems/ruby-1.9.2-p136/gems/railties-3.0.3/lib/rails/application/finisher.rb:35:in `block in '
    /Users/sean/.rvm/gems/ruby-1.9.2-p136/gems/railties-3.0.3/lib/rails/initializable.rb:25:in `instance_exec'
    /Users/sean/.rvm/gems/ruby-1.9.2-p136/gems/railties-3.0.3/lib/rails/initializable.rb:25:in `run'
    /Users/sean/.rvm/gems/ruby-1.9.2-p136/gems/railties-3.0.3/lib/rails/initializable.rb:50:in `block in run_initializers'
    /Users/sean/.rvm/gems/ruby-1.9.2-p136/gems/railties-3.0.3/lib/rails/initializable.rb:49:in `each'
    /Users/sean/.rvm/gems/ruby-1.9.2-p136/gems/railties-3.0.3/lib/rails/initializable.rb:49:in `run_initializers'
    /Users/sean/.rvm/gems/ruby-1.9.2-p136/gems/railties-3.0.3/lib/rails/application.rb:134:in `initialize!'
    /Users/sean/.rvm/gems/ruby-1.9.2-p136/gems/railties-3.0.3/lib/rails/application.rb:77:in `method_missing'
    config/environment.rb:8:in `'
    /Users/sean/.rvm/gems/ruby-1.9.2-p136/gems/activesupport-3.0.3/lib/active_support/dependencies.rb:239:in `block in require'
    /Users/sean/.rvm/gems/ruby-1.9.2-p136/gems/activesupport-3.0.3/lib/active_support/dependencies.rb:225:in `block in load_dependency'
    /Users/sean/.rvm/gems/ruby-1.9.2-p136/gems/activesupport-3.0.3/lib/active_support/dependencies.rb:596:in `new_constants_in'
    /Users/sean/.rvm/gems/ruby-1.9.2-p136/gems/activesupport-3.0.3/lib/active_support/dependencies.rb:225:in `load_dependency'
    /Users/sean/.rvm/gems/ruby-1.9.2-p136/gems/activesupport-3.0.3/lib/active_support/dependencies.rb:239:in `require'
    spec/spec_helper.rb:9:in `block in '
    /Users/sean/.rvm/gems/ruby-1.9.2-p136/gems/spork-0.9.0.rc3/lib/spork.rb:23:in `prefork'
    spec/spec_helper.rb:4:in `'

更新：我的 spec_helper.rb

require 'rubygems'
require 'spork'

ENV["RAILS_ENV"] = "test"

Spork.prefork do
  require File.expand_path(File.dirname(__FILE__) + '/../config/environment')
  require 'rspec/rails'
end

Spork.each_run do
  # Hub::Application.reload_routes!
end

Dir["#{File.dirname(__FILE__)}/support/**/*.rb"].each {|f| require f}

如果我移动 require File.expand_path(File.dirname(__FILE__) + '/../config /environment') 在预分叉之外，我的模型没有预加载，但正如您可能期望的那样，运行我的测试需要更长的时间。

关于如何让 spork 不在 Rails 3 应用程序上加载模型有什么想法吗？我尝试过使用 spork 0.8.4、master 分支，目前使用 0.9.0.rc3。有谁知道如何避免预加载模型？

Answer 1

经过很长时间的旋转，我终于得到了一些可以接受的东西：

Spork.prefork do
  require "rails/mongoid"
  Spork.trap_class_method(Rails::Mongoid, :load_models)

  # The following does not work correctly with Devise's routes that load the User model. 
  # Results in NameError unintitialized *
  # :reload_routes! triggers :devise_for which loads and caches the User class.
  # https://github.com/timcharper/spork/wiki/Spork.trap_method-Jujutsu
  # require "rails/application"
  # Spork.trap_method(Rails::Application, :reload_routes!) 

  require 'factory_girl_rails'
  Spork.trap_class_method(Factory, :find_definitions)

  require File.expand_path(File.dirname(__FILE__) + '/../config/environment')

end

问题主要是由于 Rails::Mongoid#load_models 造成的。在检查了 spork 的调试输出和加载方式的回溯之后，提供了一些关于加载模型的线索。此页面有更多详细信息 https://github.com/timcharper/spork /wiki/Spork.trap_method-Jujutsu，但我没有找到：reload_routes！帮助 Devise 强制预加载 User 类。

我的规格现在运行得更快了。如果我能让我的用户模型不被缓存，我就会很幸福，但在那之前，我会感到非常满意。

Answer 2

我在 RSpec 和 Cucumber on Rails 3.1 中都有以下设置，并且模型令人耳目一新：

Setfactory_girls_rails require =>; Gemfile 中的 false

gem 'factory_girl_rails', :require => false

将 Spork.prefork 和 Spork.each_run 块替换为以下代码。

if Spork.using_spork?

  ActiveSupport::Dependencies.clear
  ActiveRecord::Base.instantiate_observers

  Spork.prefork do

  end

  Spork.each_run do
    require 'factory_girl_rails'

    # reload all the models
    Dir["#{Rails.root}/app/models/**/*.rb"].each do |model|
      load model
    end

    # reload routes
    Rails.application.reload_routes!

  end

end

Answer 3

以下建议的解决方案此处对我有用。它还会重新加载用户模型。

# env.rb
Spork.each_run do
  require 'factory_girl_rails'
  # reload all the models
  Dir["#{Rails.root}/app/models/**/*.rb"].each do |model|
    load model
  end
end

Answer 4

这个解决方案对我有用（来自 http://my .rails-royce.org/2011/03/17/rspec-2-and-fixtures/）

Spork.prefork do
  require 'rails/application'
  Spork.trap_method(Rails::Application, :reload_routes!)
  Spork.trap_method(Rails::Application::RoutesReloader, :reload!) 
  Spork.trap_method(Rails::Application, :eager_load!)
  require File.expand_path("../../config/environment", __FILE__)
  Rails.application.railties.all { |r| r.eager_load! }

  require 'rspec/rails'

  RSpec.configure do |config|
     ...
  end
end

请注意，在each_run中执行“加载模型”只是部分解决方案，这将重新评估模型代码，但例如删除模型方法后，它仍将存在于内存中，直到您重新启动 Spork。