Ruby on rails 视图中的实例变量

我正在按照RubyonRails指南学习RubyonRails的绝对基础知识。然而，我在试图在视图中显示控制器中初始化的变量时遇到了一个问题：在test和show视图中都显示“nil:NilClass的未定义方法”

app/controller/articles\u controller

class ArticlesController < ApplicationController

  def new
  end

  def create
    @article = Article.new(article_params)
    @article.save
    redirect_to @article
  end

  private
    def article_params
      params.require(:article).permit(:title, :text)
    end

  def show
    @article = Article.find(params[:id])
  end

  def test
    @testing = [0, 1, 2, 3]
  end

end



app/views/articles/new.html.haml

= form_for :article, :url => articles_path do |f|
  %p
    = f.label :title
    %br/
    = f.text_field :title
  %p
    = f.label :text
    %br/
    = f.text_field :title
  %p
    = f.submit



app/views/articles/show.html.haml

%p 
  Title:
  %br/
  = @article.title
%p
  Text:
  %br/
  = @article.text


app/views/articles/test.html.haml

= @testing[0]

---

任何帮助都将不胜感激。我不知道我错过了什么。感谢您在控制器中使用@article，在视图中使用@articles。将视图中的@articles更改为@article

另外，将私有方法移到类的底部-显示和测试方法现在在控制器中是私有的

class ArticlesController < ApplicationController

  def new
  end

  def create
    @article = Article.new(article_params)
    @article.save
    redirect_to @article
  end

  def show
    @article = Article.find(params[:id])
  end

  def test
    @testing = [0, 1, 2, 3]
  end

  private
    def article_params
      params.require(:article).permit(:title, :text)
    end
end

class-ArticlesController

我已经对

@文章

做出了回应

@testing

似乎还可以-您可以粘贴您得到的确切错误以及您的路由吗？什么不起作用？你有什么错误？粘贴整个错误消息。非常感谢！问题在于方法是私有的

class ArticlesController < ApplicationController

  def new
  end

  def create
    @article = Article.new(article_params)
    @article.save
    redirect_to @article
  end

  def show
    @article = Article.find(params[:id])
  end

  def test
    @testing = [0, 1, 2, 3]
  end

  private
    def article_params
      params.require(:article).permit(:title, :text)
    end
end