1

您好,我在使用设计的 Rails 3.2 应用程序中收到 NoMethodError in Users#show 错误。

下面我的节目第 2 行出错:

 <strong>Firstname:</strong>
   <%= @user.firstname %>
 </p>
 <p>
 <strong>dateofbirth:</strong>

(如果我删除了名字框,则会出现出生日期等错误。)

我正在为我的用户使用设计,但生成了一个用户控制器来放置我的视图。

我不确定问题是什么,因为我运行了迁移并且架构中存在名字

这是用户控制器:

class UsersController < ApplicationController
#  before_action :set_user, only: [:show, :edit, :update, :destroy]

  def find
    @user = User.new
  end

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

  # GET /users
  # GET /users.json
  def index
    @users = User.all
  end

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

  # GET /users/new
  def new
    @user = User.new
  end

  # GET /users/1/edit
  def edit
  end

  # POST /users
  # POST /users.json
  def create
    @user = User.new(user_params)

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

  # PATCH/PUT /users/1
  # PATCH/PUT /users/1.json
  def update
    respond_to do |format|
      if @user.update(user_params)
        format.html { redirect_to @user, notice: 'User was successfully updated.' }
        format.json { head :no_content }
      else
        format.html { render action: 'edit' }
        format.json { render json: @user.errors, status: :unprocessable_entity }
      end
    end
  end

  # DELETE /users/1
  # DELETE /users/1.json
  def destroy
    @user.destroy
    respond_to do |format|
      format.html { redirect_to users_url }
      format.json { head :no_content }
    end
  end

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

    # Never trust parameters from the scary internet, only allow the white list through.
    def user_params
      params.require(:user).permit(:username, :firstname, :dateofbirth, :lastname, :gender, :location, :email, :password)
    end
end
4

1 回答 1

0

您的控制器定义了两个显示方法。尝试删除第二个。我相信空的 show 方法正在覆盖您的填充 show 方法。在您看来,@user 不存在,因此它的计算结果为零。Nil 既没有 firstname 方法,也没有 dateofbirth 方法。因此出现 NoMethodError。

于 2013-10-20T08:39:33.210 回答