'before_filter'未定義的方法

儘管在下一行中明確定義了方法，但我仍遇到以下錯誤。'before_filter'未定義的方法

undefined method `before_filter' for AuthorsController:Class

我正在關注此tutorial。

代碼段如下：

authors_controller.rb

class AuthorsController < ApplicationController 

    before_action :set_author, only: [:show, :edit, :update, :destroy] 
    before_filter :zero_authors_or_authenticated, only: [:new, :create] 

    def zero_authors_or_authenticated 
    # If either one of them is true this filter won’t do anything, allowing the requested user registration form to be rendered 
    unless Author.count == 0 || current_user # checking if there are either zero registered users OR if there is a user already logged in 
     redirect_to root_path # if neither are true, then redirect to root_path and return false 
     return false 
    end 
    end 

    # GET /authors 
    # GET /authors.json 
    def index 
    @authors = Author.all 
    end 

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

    # GET /authors/new 
    def new 
    @author = Author.new 
    end 

    # GET /authors/1/edit 
    def edit 
    end 

    # POST /authors 
    # POST /authors.json 
    def create 
    @author = Author.new(author_params) 

    respond_to do |format| 
     if @author.save 
     format.html { redirect_to @author, notice: 'Author was successfully created.' } 
     format.json { render :show, status: :created, location: @author } 
     else 
     format.html { render :new } 
     format.json { render json: @author.errors, status: :unprocessable_entity } 
     end 
    end 
    end 

    # PATCH/PUT /authors/1 
    # PATCH/PUT /authors/1.json 
    def update 
    respond_to do |format| 
     if @author.update(author_params) 
     format.html { redirect_to @author, notice: 'Author was successfully updated.' } 
     format.json { render :show, status: :ok, location: @author } 
     else 
     format.html { render :edit } 
     format.json { render json: @author.errors, status: :unprocessable_entity } 
     end 
    end 
    end 

    # DELETE /authors/1 
    # DELETE /authors/1.json 
    def destroy 
    @author.destroy 
    respond_to do |format| 
     format.html { redirect_to authors_url, notice: 'Author was successfully destroyed.' } 
     format.json { head :no_content } 
    end 
    end 

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

    # Never trust parameters from the scary internet, only allow the white list through. 
    def author_params 
     params.require(:author).permit(:username, :email, :password, :password_confirmation) 
    end 
end

使用巫作爲認證，窗10，可視代碼。

來源

2017-07-10 Carrein

其中的Rails的版本，您使用的是繼承了你控制？ – 31piy

Rails 5.1.2，謝謝我不知道before_filter已被棄用。 – Carrein

那裏;'before_action'和'before_filter'之間沒有區別，除了'before_filter'已被棄用或刪除。改用'before_action'。 – SteveTurczyn

嘗試使用代替

before_filter :zero_authors_or_authenticated, only: [:new, :create]

before_filter

before_action :zero_authors_or_authenticated, only: [:new, :create]

已棄用Rails中5.0和5.1中除去。

來源

2017-07-10 15:17:29

如果您在軌4.2.7收到此錯誤，請檢查您是否已經從動作控制器

class AuthorsController < ApplicationController 
end

來源

2017-09-16 13:03:16 Supertracer

'before_filter'未定義的方法

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