Rails 创建 post 对象的方法无效

Question

我刚开始使用 rails。我创建了一个文章 posting 表单，当我单击 post 按钮时，它会将我带到文章页面，但它不是 post 我输入的内容。

routes.rb:

get 'articles/new' => 'articles#new'
post 'articles' => 'articles#create'

articles_controller.rb:

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

      def new
        @article = Article.new
      end

      def create
        @article = Article.new(article_params)
        if @article.save
          redirect_to '/articles'
        else
          render 'new'
        end
      end

      private

      def article_params
        params.required(:article).permit(:content)
      end
    end

`articles/new.html.erb`:

    <div class="create">
  <div class="container-fluid">


    <%= form_for @article do |t| %>
        <%= t.text_field :title, :placeholder => 'Title', :class => 'article_title'  %>
        <%= t.text_area :body, :placeholder => 'Article', :class => 'article_body' %>
        <%= t.submit 'Post', :class => 'btn-btn-article' %>
<% end %>
      </div>
    </div>

服务器日志:

Started POST "/articles" for 127.0.0.1 at 2015-10-29 00:43:30 -0400
Processing by ArticlesController#create as HTML
  Parameters: {"utf8"=>"✓", "authenticity_token"=>"c49EXOKfsDP6l2xuquvmUncgTAvXIXpylgx5qK+LvCSrPFvuS37zgR9Cv/BDVwMkCFSYcaWbM+3+qpZazQby8g==", "article"=>{"title"=>"Test", "body"=>"Tsting"}, "commit"=>"Post"}
Unpermitted parameters: title, body
  [1m[36m (0.1ms)[0m  [1mBEGIN[0m
  [1m[35mSQL (0.2ms)[0m  INSERT INTO `articles` (`created_at`, `updated_at`) VALUES ('2015-10-29 04:43:30', '2015-10-29 04:43:30')
  [1m[36m (11.0ms)[0m  [1mCOMMIT[0m
Redirected to http://localhost:3000/articles
Completed 302 Found in 14ms (ActiveRecord: 11.3ms)


Started GET "/articles" for 127.0.0.1 at 2015-10-29 00:43:30 -0400
Processing by ArticlesController#index as HTML
  Rendered articles/index.erb within layouts/application (0.0ms)
Completed 200 OK in 32ms (Views: 31.5ms | ActiveRecord: 0.0ms)


Started GET "/" for 127.0.0.1 at 2015-10-29 00:51:17 -0400
Processing by HomeController#home as HTML
  Rendered home/home.erb within layouts/application (0.5ms)
Completed 200 OK in 31ms (Views: 30.1ms | ActiveRecord: 0.0ms)


Started GET "/" for 127.0.0.1 at 2015-10-29 00:51:21 -0400
Processing by HomeController#home as HTML
  Rendered home/home.erb within layouts/application (0.2ms)
Completed 200 OK in 30ms (Views: 29.1ms | ActiveRecord: 0.0ms)


Started GET "/" for 127.0.0.1 at 2015-10-29 00:51:22 -0400
Processing by HomeController#home as HTML
  Rendered home/home.erb within layouts/application (0.6ms)
Completed 200 OK in 96ms (Views: 94.8ms | ActiveRecord: 0.0ms)


Started GET "/articles/new" for 127.0.0.1 at 2015-10-29 00:51:29 -0400
Processing by ArticlesController#new as HTML
  Rendered articles/new.erb within layouts/application (1.0ms)
Completed 200 OK in 86ms (Views: 85.2ms | ActiveRecord: 0.0ms)

Answer 1

Unpermitted parameters: title, body

您应该将 article_params 更改为以下

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

Answer 2

所以，您的服务器日志告诉您问题所在：

Unpermitted parameters: title, body

您必须将 title 和 body 属性列入白名单，因为动作控制器参数在被列入白名单之前禁止用于活动模型批量分配。

变化：

  def article_params
    params.required(:article).permit(:content)
  end

收件人：

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

此外，请查看 Strong Parameters

的官方 Rails 文档

更新

我建议您在 routes 文件中使用 RESTful route：

resources :articles

那么，你会有这条路线：

articles GET    /articles(.:format)          articles#index

然后，在控制器的创建操作中，您可以使用 articles_path:

  def create
    @article = Article.new(article_params)
    if @article.save
      redirect_to articles_path
    else
      render 'new'
    end
  end

Answer 3

它在你的日志中说 -

Unpermitted parameters: title, body

将您的 article_params 方法更改为

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

Rails 创建 post 对象的方法无效

Rails create method to post object not working

ruby-on-rails

ruby

ruby-on-rails-3

rubymine

更新