Ruby on rails Ruby:BusinessAndUnitsController索引中的NoMethodError

我正在尝试在我的应用程序中创建一个多层控制器

结构如下：

--业务单元和单元控制器（主控制器）

--↳ 业务单元控制器（子控制器）

----↳ 业务部经理部总监（副总监至业务部总监）

----↳ 业务部门主管（副主管至业务部门主管）

----↳ 业务单元战略属性控制器（子控制器到业务单元控制器）

这很复杂，可能太复杂了

总之，我创建了一个名为：

business_and_units_controller.rb

使用模型：

business_and_unit.rb

我已将控制器添加到我的routes.rb（以测试它是否工作）

在查看代码是否有效后，我发现以下错误：

NoMethodError in BusinessAndUnitsController#index
undefined method `businessandunits' for #<User:0x007f55666f2a58>

Extracted source (around line #6):
1
2             
3  
4   def index
6    @business_and_units = current_user.businessandunits
7    
8   end

业务和单元控制器索引中的命名错误 未定义的方法“businessandunits”# 提取的源（第6行附近）： 1. 2. 3. 4 def索引 6@business_和_units=当前_用户。businessandunits 7. 8结束 我知道问题的原因是我的业务单位和单位没有定义。但我不明白为什么它没有定义

你们谁能看出我问题的原因吗

---

总结如下：

My问题：根据ruby，索引中未定义My business_和_units_controller.rb

这篇文章的目标：理解为什么没有定义它

---

附言：我已经搜索了很多类似的帖子来寻找我问题的解决方案，但一直没有找到解决方案

我的控制器文件

class BusinessAndUnitsController < ApplicationController
  before_action :logged_in_user, only: [:create, :destroy]
  before_action :correct_user,   only: :destroy

    def index
     @business_and_units = current_user.business_and_units

    end

    def show
      @business_and_units = Business_and_unit.find_by(id: params[:id])
      if !@business_and_unit
        raise ActionController::RoutingError.new('Not Found')
      end
      @user = @business_and_unit.user
    end

    def new
      @user = User.new
      @business_and_unit = Business_and_unit.new
    end

    def edit
      @business_and_unit = Business_and_unit.find(params[:id])
    end

    def create
      @business_and_unit = current_user.business_and_units.build(business_and_unit_params)
      if @business_and_unit.save
        flash[:success] = "business_and_unit created!"
        redirect_to @business_and_unit
      else
        @feed_items = current_user.feed.paginate(page: params[:page])
        render 'new'
      end
    end

    def update
      @business_and_unit = Business_and_unit.find(params[:id])
      if @business_and_unit.update(business_and_unit_params)
        redirect_to @business_and_unit
      else
        render 'edit'
      end
    end

    def destroy
      @business_and_unit.destroy
      flash[:success] = "business_and_unit deleted"
      redirect_to business_and_units_path
    end

    private

    def business_and_unit_params
      params.require(:business_and_unit).permit( 
      :corporate_strategy,  :future_sale_value,
      :industry, :market_focus, :business_unit,

      business_units_attributes: [
      :id, :business_units,
      :_destroy],

       business_managers_attributes: [
      :id, :business_managers,
      :_destroy],

       business_divisions_attributes: [
      :id, :business_divisions,
      :business_divisions_managers,
      :_destroy],

       business_units_strats_attributes: [
      :id, :business_units_strats,
      :_destroy])
    end

    def correct_user
      @business_and_unit = current_user.business_and_units.find_by(id: params[:id])
      redirect_to business_and_units_path if @business_and_unit.nil?
    end

end

类BusinessAndUnitsController

问题与控制器无关

错误在于您的

用户

模型中没有方法

#businessandunits

根据您提供的信息，我认为您遗漏了一个关系定义

在您的
用户
类中有许多：业务和单位

---

然后，您将能够调用

当前用户。业务和单位

错误消息（投诉

当前用户。业务和单位

）和您提供的代码（看起来像这

当前用户。相关行的业务和单位

）不匹配。您的

用户

型号看起来怎么样？是否定义了q方法

businessandunits

或

businessandunits

。安德尔似乎回答了这个问题！但你要去的是同一个方向。非常感谢。谢谢你，安德烈！看来这是我的疏忽。用户类确实缺少了很多部分！

class BusinessAndUnitsController < ApplicationController
  before_action :logged_in_user, only: [:create, :destroy]
  before_action :correct_user,   only: :destroy

    def index
     @business_and_units = current_user.business_and_units

    end

    def show
      @business_and_units = Business_and_unit.find_by(id: params[:id])
      if !@business_and_unit
        raise ActionController::RoutingError.new('Not Found')
      end
      @user = @business_and_unit.user
    end

    def new
      @user = User.new
      @business_and_unit = Business_and_unit.new
    end

    def edit
      @business_and_unit = Business_and_unit.find(params[:id])
    end

    def create
      @business_and_unit = current_user.business_and_units.build(business_and_unit_params)
      if @business_and_unit.save
        flash[:success] = "business_and_unit created!"
        redirect_to @business_and_unit
      else
        @feed_items = current_user.feed.paginate(page: params[:page])
        render 'new'
      end
    end

    def update
      @business_and_unit = Business_and_unit.find(params[:id])
      if @business_and_unit.update(business_and_unit_params)
        redirect_to @business_and_unit
      else
        render 'edit'
      end
    end

    def destroy
      @business_and_unit.destroy
      flash[:success] = "business_and_unit deleted"
      redirect_to business_and_units_path
    end

    private

    def business_and_unit_params
      params.require(:business_and_unit).permit( 
      :corporate_strategy,  :future_sale_value,
      :industry, :market_focus, :business_unit,

      business_units_attributes: [
      :id, :business_units,
      :_destroy],

       business_managers_attributes: [
      :id, :business_managers,
      :_destroy],

       business_divisions_attributes: [
      :id, :business_divisions,
      :business_divisions_managers,
      :_destroy],

       business_units_strats_attributes: [
      :id, :business_units_strats,
      :_destroy])
    end

    def correct_user
      @business_and_unit = current_user.business_and_units.find_by(id: params[:id])
      redirect_to business_and_units_path if @business_and_unit.nil?
    end

end