Question

我一直在使用Rails脚手架来构建一个Rails 4应用程序。

我目前的问题如下所示 - 当我尝试在我的应用中渲染文章新页面时，该问题就出现了：

ActionController::UnknownFormat

它指的是文章控制器中的创建操作（它提取此错误位置）：

@article = Article.new(article_params)

respond_to do |format|
  if @article.save
    format.json { render :show, status: :created, location: @article }
  else

我有一个文章控制器：

class ArticlesController < ApplicationController
  before_action :set_article, only: [:show, :edit, :update, :destroy]


  # respond_to :html
# GET /articles
  # GET /articles.json
  def index
    @articles = Article.all
  end

  # GET /articles/1
  # GET /articles/1.json
  def show
  end

  # GET /articles/new
  def new
    @article = Article.new
  end

  # GET /articles/1/edit
  def edit
  end

  # POST /articles
  # POST /articles.json
  def create
    # before_action :authenticate_user!
    # authorize @article
    @article = Article.new(article_params)

    respond_to do |format|
      if @article.save
        format.json { render :show, status: :created, location: @article }
      else
        format.html { render :new }
        format.json { render json: @article.errors, status: :unprocessable_entity }
      end
    end
  end

  # PATCH/PUT /articles/1
  # PATCH/PUT /articles/1.json
  def update
    before_action :authenticate_user!
    authorize @article
    respond_to do |format|
      if @article.update(article_params)
        format.json { render :show, status: :ok, location: @article }
      else
        format.html { render :edit }
        format.json { render json: @article.errors, status: :unprocessable_entity }
      end
    end
  end

  # DELETE /articles/1
  # DELETE /articles/1.json
  def destroy
    before_action :authenticate_user!
    authorize @article
    @article.destroy
    respond_to do |format|
      format.json { head :no_content }
    end
  end

  private
    # Use callbacks to share common setup or constraints between actions.
    def set_article
      @article = Article.find(params[:id])
    end

    # Never trust parameters from the scary internet, only allow the white list through.
    def article_params
      params[:article].permit(:body, :title, :image,
        comment_attributes: [:opinion])
    end
end

我在控制器的顶行回复了html。我不知道为什么或这样做。我已经读过其他问题，说你需要给它一些回应，或者使用响应者宝石。我不想要任何特别的东西 - 我只想要渲染页面。

谁能看到这里的错误？

Answer 1

如果你不想做任何特别的事情，这就是我要如何清理这个控制器：

class ArticlesController < ApplicationController
  before_action :set_article, except: [:new, :create, :index]

  def index
    @articles = Article.all
  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
    else
      render :new
    end
  end

  def update
    if @article.update_attributes(article_params)
      redirect_to @article
    else
      render :edit
    end
  end

  def destroy 
    if @article.destroy
      redirect_to articles_path
    else
      redirect_to @article
    end
  end

  private

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

  def article_params
    params[:article].permit(:body, :title, :image,
      comment_attributes: [:opinion])
  end
end

请注意，我删除了您的授权，因此在一切正常时将其重新添加。

Answer 2

您似乎需要format.html，因此您可以添加：

@article = Article.new(article_params)

respond_to do |format|
  if @article.save
    format.html { redirect_to(@article,
                    :notice => 'Article was successfully created.') }
    format.json { render :show, status: :created, location: @article }
  else
    format.json { render :show, status: :created, location: @article }
  end
end

我希望这对你有所帮助。

Rails - 脚手架 - 控制器设置 - unknownFormat

2 个答案: