Question

我正在使用本指南here

我一直试图在ArticlesController #index中解决问题NameError 当我开始将评论添加为资源，控制器等时，就会出现这种情况。

ArticlesController #index中的NameError 告诉我 app / models / article.rb：1：in

<top (required)>'
app/controllers/articles_controller.rb:3:in index'

这是我的代码：

class ArticlesController < ApplicationController
def index
@article = Article.all
end

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

def new
   @article = Article.new
end

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

def create
  @article = Article.new(article_params)

 if @article.save
  redirect_to @article
 else
    render 'new'
 end
end

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

  if @article.update(article_params)
    redirect_to @article
  else
    render 'edit'
  end
end

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

  redirect_to articles_path
end

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

这段代码：

class Article < ApplicationRecord
has_many :comments
validates :title, presence: true,
                  length: { minimum: 5 }
end

我是否拥有问题中所需的所有代码？

Answer 1

查看错误<top (required)>'app/controllers/articles_controller.rb:3:inindex'，我认为问题来自您的index action应该是

def index
  @articles = Article.all
end

也将模型更改为

class Article < ActiveRecord::Base
  has_many :comments
  validates :title, presence: true, length: { minimum: 5 }
end

因为您的Article模型应该继承自ActiveRecord::Base而不是ApplicationRecord

在ArticlesController #index中开始使用rails NameError

1 个答案: