無法通過與具有一對多的關係屬於插入使用自定義操作數據軌

Question

我的關係是：

class PrivateClass < ActiveRecord::Base 
    has_many :lesson_plans 
end 

class LessonPlan < ActiveRecord::Base 
    belongs_to :private_class 
end 

我的形式是這樣的：

<%= form_tag (add_lesson_plan_teacher_teacher_private_school_private_class_path), remote: true do %> 
    <div class="row"> 
     <div class="col-sm-6"> 
     <div class="form-group"> 
      <%= label_tag :title, nil, :class => "control-label" %> 
      <%= text_field_tag "private_class[lesson_plan][title]", "", class: "form-control first_input", required: true, style: "width: 210%;" %> 
     </div> 
     <div class="form-group"> 
      <%= label_tag :description, nil, :class => "control-label" %> 
      <%= text_area_tag "private_class[lesson_plan][description]", "", placeholder: "Enter Description Here", class: "form-control", rows: "3", required: true, style: "width: 210%;" %> 
     </div> 
     <div class="form-group"> 
      <%= label_tag :notes, nil, :class => "control-label" %> 
      <%= text_area_tag "private_class[lesson_plan][notes]", "", placeholder: "Enter Notes Here", class: "form-control", rows: "3", required: true, style: "width: 210%;" %> 
     </div> 
     <div class="form-group"> 
      <%= submit_tag "Create lesson plan", :class => "btn btn-info" %> 
     </div> 
     </div> 
    </div> 
<% end %> 

我的控制器：

class Teacher::PrivateClassesController < ApplicationController 

    before_action :authenticate_user! 
    before_action :set_teacher 
    before_action :set_private_school 
    before_action :set_private_class 

    def add_lesson_plan 
    @lesson_plan = @private_class.lesson_plans.new(private_class_params).save 
    end 

    private 

    def private_class_params 
    params.require(:private_class).permit! 
    end 

    def set_teacher 
    @teacher = Teacher.friendly.find(params[:teacher_id]) 
    end 

    def set_private_school 
    @private_school = PrivateSchool.friendly.find(params[:private_school_id]) 
    end 

    def set_private_class 
    @private_class = PrivateClass.find(params[:id]) 
    end 
end 

路線是：

resources :private_schools do 
     resources :private_classes do 
      member do 
      get :lesson_plan 
      post :lesson_plan 
      post :add_lesson_plan 
      end 
     end 
     end 

現在的問題是，當我嘗試在課程中插入數據的計劃表中，它說：

ActiveRecord::UnknownAttributeError (unknown attribute 'lesson_plan' for LessonPlan.): 
    app/controllers/teacher/private_classes_controller.rb:11:in `add_lesson_plan' 

我需要做的就是private_class_id 如果有任何進入課程計劃字段中的數據爲課程計劃表錯了，請糾正我。

UPDATE

這裏是看跌語句的結果：

def add_lesson_plan 
    puts params.inspect, '++++++++++++++++++++++++' 
    puts @private_class.lesson_plans.new.inspect, '**************************************' 
    @lesson_plan = @private_class.lesson_plans.new(private_class_params).save! 
    end 

{"utf8"=>"✓", "private_class"=>{"lesson_plans"=>{"title"=>"ggd", "description"=>"gghh", "notes"=>"gggkd"}}, "commit"=>"Create lesson plan", "controller"=>"teacher/private_classes", "action"=>"add_lesson_plan", "teacher_id"=>"carmel-cynthia", "private_school_id"=>"dr-jasmine-e-mcnair-high-school", "id"=>"1"} 
++++++++++++++++++++++++ 
#<LessonPlan id: nil, title: nil, description: nil, notes: nil, subject_id: nil, teacher_id: nil, created_at: nil, updated_at: nil, is_private: true, is_publish: false, user_id: nil, publish_date: nil, popularity_count: 0, is_special: false, private_class_id: 1> 
************************************** 

Answer 1

params：

{"utf8"=>"✓", "private_class"=>{"lesson_plans"=>{"title"=>"ggd", "description"=>"gghh", "notes"=>"gggkd"}}, "commit"=>"Create lesson plan", "controller"=>"teacher/private_classes", "action"=>"add_lesson_plan", "teacher_id"=>"carmel-cynthia", "private_school_id"=>"dr-jasmine-e-mcnair-high-school", "id"=>"1"} 

的private_class_params方法可能返回：

{"lesson_plans"=>{"title"=>"ggd", "description"=>"gghh", "notes"=>"gggkd"}} 

但實際上你需要的lesson_plans的內容，因此將其更改爲：

def private_class_params 
    params.require(:private_class).permit![:lesson_plans] 
end 

或調整的形式將它張貼在預期的形狀;）

編輯

params.require(:private_class).permit!返回private_class密鑰的內容，這是一個散列...然後[:lesson_plans]返回該散列中的lesson_plans密鑰的內容，這些是你的屬性需要創建的對象......

你可以嘗試以下方法在控制檯去理解它：

params = {"utf8"=>"✓", "private_class"=>{"lesson_plans"=>{"title"=>"ggd", "description"=>"gghh", "notes"=>"gggkd"}}, "commit"=>"Create lesson plan", "controller"=>"teacher/private_classes", "action"=>"add_lesson_plan", "teacher_id"=>"carmel-cynthia", "private_school_id"=>"dr-jasmine-e-mcnair-high-school", "id"=>"1"} 
#=> {"utf8"=>"✓", "private_class"=>{"lesson_plans"=>{"title"=>"ggd", "description"=>"gghh", "notes"=>"gggkd"}}, "commit"=>"Create lesson plan", "controller"=>"teacher/private_classes", "action"=>"add_lesson_plan", "teacher_id"=>"carmel-cynthia", "private_school_id"=>"dr-jasmine-e-mcnair-high-school", "id"=>"1"} 
params['private_class'] # similar to the result of your private_class_params method 
#=> {"lesson_plans"=>{"title"=>"ggd", "description"=>"gghh", "notes"=>"gggkd"}} 
params['private_class']['lesson_plans'] # the attributs you actually need 
#=> {"title"=>"ggd", "description"=>"gghh", "notes"=>"gggkd"}