Question

我有一个非常奇怪的错误，当我提交表单以创建新的管理员时，我收到此错误：

NoMethodError in AdminsController#create
undefined method `admin?' for #<Admin:0x6c7f098>

排队：

if @admin.save

这个错误是如何产生的？我主要使用脚手架代码，我只删除控制器的视图！这是我的控制员：我感谢大家的帮助！

class AdminsController < ApplicationController
  before_action :set_admin, only: [ :edit, :update, :destroy]



  # GET /admins/new
  def new
    @admin = Admin.new
  end

  # GET /admins/1/edit
  def edit
  end

  # POST /admins
  # POST /admins.json
  def create
    @admin = Admin.new(admin_params)

    respond_to do |format|
      if @admin.save
        format.html { redirect_to adminpage_index_path, notice: 'Admin was successfully created.' }
      else
        redirect_to adminpage_index_path
      end
    end
  end

  # PATCH/PUT /admins/1
  # PATCH/PUT /admins/1.json
  def update
    respond_to do |format|
      if @admin.update(admin_params)
        format.html { redirect_to adminpage_index_path , notice: 'Admin was successfully updated.' }
        format.json { head :no_content }
      else
        redirect_to adminpage_index_path
      end
    end
  end

  # DELETE /admins/1
  # DELETE /admins/1.json
  def destroy
    @admin.destroy
    respond_to do |format|
      format.html { redirect_to adminpage_index_path }
    end
  end

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

    # Never trust parameters from the scary internet, only allow the white list through.
    def admin_params
      params.require(:admin).permit(:username, :vorname, :nachname, :strasse, :ort, :plz, :telefon, :handy, :email, :password, :password_confirmation)
    end
end

Answer 1

从我所看到的，您的Admin模型可能不会从ActiveRecord :: Base继承。确保它确实如此。该模型应如下所示：

class Admin < ActiveRecord::Base
  # ...
end

Answer 2

您的管理模型有某种回调。即before_save，after_save，after_validations。那样的东西试图打电话给管理员？

发布admin.rb文件和错误的堆栈跟踪，这应该很容易找到。

@ admin.save的未定义方法

2 个答案: