のRails：パッチActionCable（新しいアダプタを追加）

Question

質問は、このプルリクエストを指し：それはまだマージされていないのでhttps://github.com/rails/rails/pull/23211

、私は自分のアプリケーションには、このパッチを当てる猿にしたいです。

私は、今lib/core_extenstions/subsctiption_adapter/test.rb

にこのサブスクリプション・アダプタを入れて初期化monkey_patch.rbに私が試してみてください。

#require 'lib/action_cable/test.rb' 
#autoload ActionCable::SubscriptionAdapter::Test 
module ActionCable 
    module SubscriptionAdapter 
    puts Rails.root.join('lib/core_extensions/action_cable/test.rb').inspect 
    autoload :Test, Rails.root.join('lib/core_extensions/action_cable/test.rb') 
    puts Test.inspect 
    end 
end 

その後：

MacBook-Pro-Vaceslav:mvp_c slava$ bundle exec rails c test 
Running via Spring preloader in process 93788 
Loading test environment (Rails 5.0.2) 
irb: warn: can't alias context from irb_context. 
irb(main):001:0> server = ActionCable.server 
=> #<ActionCable::Server::Base:0x007f890e812628 @mutex=#<Monitor:0x007f890e812600 @mon_owner=nil, @mon_count=0, @mon_mutex=#<Thread::Mutex:0x007f890e8125b0>>, @pubsub=nil, @worker_pool=nil, @event_loop=nil, @remote_connections=nil> 
irb(main):002:0> server.pubsub 
LoadError: Could not load 'action_cable/subscription_adapter/test'. Make sure that the adapter in config/cable.yml is valid. If you use an adapter other than 'postgresql' or 'redis' add the necessary adapter gem to the Gemfile. 

だから、問題の原因はここにある：

https://github.com/rails/rails/blob/master/actioncable/lib/action_cable/server/configuration.rb

def pubsub_adapter 
    adapter = (cable.fetch("adapter") { "redis" }) 
    path_to_adapter = "action_cable/subscription_adapter/#{adapter}" 
    begin 
     require path_to_adapter 
    rescue Gem::LoadError => e 
     raise Gem::LoadError, "Specified '#{adapter}' for Action Cable pubsub adapter, but the gem is not loaded. Add `gem '#{e.name}'` to your Gemfile (and ensure its version is at the minimum required by Action Cable)." 
    rescue LoadError => e 
     raise LoadError, "Could not load '#{path_to_adapter}'. Make sure that the adapter in config/cable.yml is valid. If you use an adapter other than 'postgresql' or 'redis' add the necessary adapter gem to the Gemfile.", e.backtrace 
    end 

    adapter = adapter.camelize 
    adapter = "PostgreSQL" if adapter == "Postgresql" 
    "ActionCable::SubscriptionAdapter::#{adapter}".constantize 
    end 

これを回避する方法がわかりません。

Answer 1

これは、私が思うかなり悪いですが、以外のこの実装で他の方法が表示されない：

module ActionCable 
    module Server 
    class Configuration 
     def pubsub_adapter 
     if Rails.env == 'test' 
      require Rails.root.join('lib/core_extensions/action_cable/test.rb') 
      ActionCable::SubscriptionAdapter::Test 
     else 
      super 
     end 
     end 
    end 
    end 
end 

どれ改善は歓迎されています。

before do 
    ActionCable.server.instance_variable_set(:@pubsub, ActionCable::SubscriptionAdapter::Test) 
    end 

：

EDIT

おそらくもっと良い方法は、それがテストスーツを必要とスタブにしています