小编Uzz*_*zar的帖子

我有这样的哈希:

Some_hash =
    {"Albania"=>"Europe", 
    "Andorra"=>"Europe", 
    "Austria"=>"Europe",
    Lebanon"=>"Asia", 
    "Macau"=>"Asia", 
    "Malaysia"=>"Asia",
    "Papua New Guinea"=>"Asia",
    "Jamaica"=>"North America",
    "Martinique"=>"North America",
    "Argentina"=>"South America",
    "Chile"=>"South America", 
    "Sao Tome and Principe"=>"Africa", 
    "Senegal"=>"Africa",
    "Somalia"=>"Africa",}

我想单独确定五大洲以及属于它们的国家,这样我最终会得到这样的结论:

{"Africa" => ["Senegal", "Somalia"]}
{"Europe" => ["Albania", "Andorra", "Austria"]}

适用于所有大陆.

我试过这个:

def country
  inflation_hash = {}
  XPath.match( data, "//country").map do |element|
    inflation_hash[element.attributes["name"]] = element.attributes["continent"]
  end
  inflation_hash.each do |country, continent|
    new_hash = {}
    if inflation_hash.has_value?("Africa") == true
      new_hash["Africa"] = inflation_hash.keys
      puts new_hash
    end
  end
end

而且效果太好了.我得到一个新的哈希:

{Africa => []} 

但我有两个问题:

1. 我为每个非洲国家创建了一个新哈希.
2. 每个新哈希都包含所有密钥,其中包括所有非非洲国家/地区.

我认为第一个问题与each …

UsersProfileController具有强大的参数,如下所示:

    def user_profile_params
      params.permit(:age, :relations)
      # yes, I am not requiring user_profile. Just permitting attributes I need. 
    end

create动作通过父(has-one和belongs-to association)构建UserProfile

    def create
      parent = Parent.create_guest
      parent.build_user_profile(user_profile_params)
      if parent.save 
        # do something 
      else 
        # handle error
      end
    end

在UserProfiles中调用params返回:

    <ActionController::Parameters 
      {"age"=>"23", 
       "relations"=>"3", 
       "subdomain"=>"api", 
       "format"=>:json, 
       "controller"=>"api/v1/user_profiles", 
       "action"=>"create"} 
     permitted: false>

调用user_profile_params,返回:

    user_profile_params:
      Unpermitted parameters: subdomain, format
      <ActionController::Parameters 
       {"age"=>"23", 
       "relations"=>"3", } 
      permitted: true>

当发布请求时,我希望能够使用user_profile_params中的白名单参数创建user_profile.相反,createUserProfiles中的操作失败,错误:Unpermitted parameters: subdomain, format.

这不是我的预期.我希望user_profile_params只包含允许的值并忽略所有其他值.

我可以添加:format和:subdomain列出允许的属性,但有些东西感觉有点不对劲.

有人可以解释发生了什么/我错过了什么？

有些东西告诉我,我在测试中缺少一个关键的概念/想法,或者(天堂禁止)ruby如何初始化对象.

我有一个类方法接受两个参数并返回所述类的实例.所以它看起来像这样:

    class Manager

      def self.run(first_arg, second_arg)
        new(first_arg, second_arg)
      end
    end

这是我的RSpec测试:

    RSpec.describe Manager, type: :api do

      let(:first_arg) { FactoryGirl.build_stubbed(:first_arg) }
      let(:second_arg) { AccountMailer.new }

      describe '::run' do 
        it "accepts two arguments" do 
          expect(Manager).to receive(:run).with(first_arg, second_arg)
          Manager.run(first_arg, second_arg)
        end

        it "instantiates the class with 2 arguments" do 
          expect(Manager).to receive(:new).with(first_arg, second_arg)
          Manager.run(first_arg, second_arg)
        end
      end
    end

由于(我相信)该方法:initialize被new调用,我将代码更新为:

   class Manager 
     # add attr_reader for read access 
     attr_reader :first_arg, :second_arg 

     def initialize(first_arg, second_arg)
       @first_arg = first_arg
       @second_arg = second_arg
     end

     def …