Ruby on rails Rails无法检索保存在DB中的数据

在RubyonRails中，我希望将数据保存在DB中，并在页面上显示保存的内容，但是我得到了一个错误，如下图所示。 我担心了三天，但还是解决不了。我想知道目标方法

class ArticlesController < ApplicationController
  # before_action :authenticate_user!
  before_action :find_article, only: [:show, :edit, :update, :destroy]

  def index
    @articles = Article.order(created_at: :desc)
  end

  def show
  end

  def new
    @article = Article.new
  end

  def edit
  end

  def create
    @article = Article.new(article_params)
    if @article.save
      redirect_to @article, notice: ""
    else
      render :new, alert: ""
    end
  end

  def update
    if @article.update(article_params)
      redirect_to @article, notice: ""
    else
      render :edit, alert: ""
    end
  end

  def destroy
    if @article.destroy
      redirect_to root_path, notice: ""
    else
      redirect_to root_path, alert: ""
    end
  end

  private

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

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

---

当您编写参考资料：文章时，它将自动生成所有7条路线

所以，您可以像这样更新路由文件

Rails.application.routes.draw do
  # root "tops#index"
  resources :articles
end

---

您面临的问题是，您没有发送有效的ID。

您正在使用默认情况下将生成7条

路由的
资源：文章。但随后使用覆盖
显示

get "/articles/index", to: "articles#index"
get "/articles/show", to: "articles#show"

当
route
将
get”/articles/index>发送到：“articles#index”
时，它假设
index
是
id
，并将转到
的“articles#show”
，并且无法找到
'id'
和
'index'
，因此

路线
应如下所示

get '/articles', to: 'articles#index'
get '/articles/new', to: 'articles#new'
get '/articles/:id', to: 'articles#show'
post '/articles', to: 'articles#create'
delete 'articles/:id', to: 'articles#destroy'
get '/articles/:id/edit', to: 'articles#edit'
put '/articles:id', to: 'articles#update'

没有

 resources :articles
  get "/articles/index", to: "articles#index"
  get "/articles/new", to: "articles#new"
  get "/articles/show", to: "articles#show"

在您的情况下，或者您可以简单地使用

resources:articles
将自动生成所有7条路线

因此，请删除这些
路由

get "/articles/index", to: "articles#index"
get "/articles/new", to: "articles#new"
get "/articles/show", to: "articles#show"

get "/articles/index", to: "articles#index"
get "/articles/new", to: "articles#new"
get "/articles/show", to: "articles#show"