Question

当我想创建文章时，我在点击创建文章按钮

后收到此错误

没有路由匹配{：action =＆gt;“show”，：controller =＆gt;“articles”，：id =＆gt; nil}缺少必需的键：[：id]

虽然我确保在创建文章之前有用户登录。这是我的代码：

articles_controller.rb

class ArticlesController < ApplicationController
  before_action :require_user , except:[:index,:show]

  def index
      @articles = Article.all
  end  

  def new
    @article = Article.new
  end

  def create
    @article = Article.new(article_params)
    if @article.save
        flash[:notice] = "Your Article was Created"
    else
        render 'new'
    end
    redirect_to article_path(@article)
  end

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

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

  def update
    @article = Article.find(params[:id])
    if @article.update(article_params)
        flash[:notice] = "Your Article was Updated"
        redirect_to article_path(@article)
    else
        render 'edit'
    end
  end

  def destroy
    @article = Article.find(params[:id])
    @article.destroy
    flash[:notice] = "Your Article was deleted"
    redirect_to articles_path(@article)
  end

  private

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

端

users_controller.rb

class UsersController < ApplicationController
  def index
    @users = User.all
  end

  def new
    @user = User.new
  end

  def create
    @user = User.new(user_params)
    if @user.save
      flash[:success] = "You Signed up successfully"
      redirect_to articles_path
    else
      render 'new'
    end
  end

  def show
    @user = User.find(params[:id])
  end

  def edit
    @user = User.find(params[:id])
  end

  def update
    @user = User.find(params[:id])
    if @user.update(user_params)
      flash[:success]= "Your user was updated"
      redirect_to articles_path
    else
      render 'edit'
    end
  end

  private

  def user_params
    params.require(:user).permit(:username,:email,:password)
  end

端

视图/ new.html

    <h1>New Article</h1>
<%= form_for @article do |f| %>

<p>title<%= f.text_field :title %></p><br>
<p>description<%= f.text_area :description %></p>
<%= f.submit "Create" %>
<%end%>

这里的 my github repo

Answer 1

当您创建无效文章时，它将为您missing required keys: [:id]提供@article.save，因为它redirect_to article_path(@article) nil def create @article = Article.new(article_params) if @article.save flash[:notice] = "Your Article was Created" else render 'new' end redirect_to article_path(@article) end，其中@ article.id为redirect_to article_path(@article)

@article.save

如果def create @article = Article.new(article_params) if @article.save flash[:notice] = "Your Article was Created" redirect_to article_path(@article) else render 'new' end end为真，请移动user_id。

def create
       @article = current_user.articles.build(article_params)

       if @article.save
           flash[:notice] = "Your Article was Created"
           redirect_to article_path(@article)
        else
           render 'new'
        end       
    end

修改

我克隆了您的仓库，在创建没有[_id] => MongoId Object ( [$id] => 57beda7f0640fd14ca5cc307 ) [website] => MongoId Object ( [$id] => 57beda3d279871c80e8b4567 ) [url] => https://acb.com [meta_tags] => Array ( [description] => [title] => Login [title_length] => 18 )的文章时存在问题。在底部添加了更改，它似乎按预期工作。

$this->website->where('website', $website)->get();

希望有所帮助！

Answer 2

由于渲染和重定向，当 @ article.save 失败时，您收到此错误。因此，它会转到其他部分它会渲染到新的并再次重定向到显示 id = nil 的页面。

def create
   @article = Article.new(article_params)
   if @article.save
       flash[:notice] = "Your Article was Created"
       redirect_to article_path(@article.id) # or @article
    else
       render 'new'
    end       
end

UrlGenerationError缺少必需密钥[：id]错误？

2 个答案: