Question

我有一个想法，为我的副项目写一个小的redis包装器。到目前为止，一切看起来都很棒。现在，我正在尝试对我的配置进行润色，我对airbrake项目的配置块代码有点启发，reference article here

从一开始，我立即开始编写包装类，我设法及时完成。到目前为止，我需要做的是能够在irb或pry中测试我的配置代码块（config / initializers / redis_cli.rb）。
我不确定为什么我的初始化代码（位于rails项目配置/初始化器下）在这样的调试控制台环境中不起作用。

我在控制台中将我的RedisCli类实例化为=＆gt;

 RedisCli.new

我说错了 “NoMethodError：未定义的方法host' for nil:NilClass from /Users/admin/rails_projects/redis_app/lib/redis_cli.rb:44:in redis_wrapper_options'”

相比之下，它在内部Web服务器，Web砖上运行时效果很好。看起来我的RedisCli初始化程序没有在irb中正确加载。

这是我的代码：

LIB / redis_cli.rb

class RedisCli


  attr_accessor :host,:port,:db,:url,:queue

  class << self
    attr_accessor :configuration
  end

  def self.configure
    self.configuration ||= Configuration.new
    yield(configuration)
  end  

  class Configuration
    attr_accessor :host,:port,:db,:queue

    def initialize

    end
  end 

  def initialize(options={})
    options = redis_wrapper_options(options)
    @host = options[:host]
    @port = options[:port]
    @db = options[:db]
    @queue = options[:queue]
  end

  def url
    @url ||= [@host,@port].reject(&:blank?).join(":") if @url.blank?
    @url       
  end

  def lpush(klass,args)
    redis = Redis.new(:url => url)
    msg = { 'class' => klass,'args' =>  [args],'jid' => SecureRandom.hex(12), 'retry' => true, 'enqueued_at' => Time.now.to_f }
    redis.lpush(@queue,JSON.dump(msg))
  end

  def redis_wrapper_options(overrides = {})      
    {
      :host  => RedisCli.configuration.host,
      :port => RedisCli.configuration.port,    
      :db => RedisCli.configuration.db,        
      :queue   => RedisCli.configuration.queue

    }.merge(overrides || {}).delete_if { |key, value| value.nil? }
  end

end

和我的初始化程序：

配置/初始化/ redis_cli.rb

RedisCli.configure do |config|
  config.host    = 'redis://localhost'       
  config.port    = '6379'       
  config.db      = ''       
  config.queue   = 'queue:default'                      
end

有人能让我了解这个吗？

Answer 1

This was happening to me as well on Rails 5.1.4

The only thing that worked for me was to completely exit Terminal.app, relaunch Terminal.app, and then re-run rails c. Rails Console took about 4-5 seconds longer to initialize than it did before I restarted terminal. It appears that there is some sort a caching going on but that is just a hunch.

ruby-on-rails初始化程序在irb中不起作用，但在正常运行app时正常工作

1 个答案: