Ruby on rails 4 轨道嵌套形式零件不'；即使允许，也不能保存

我正在用rails 4编程。我已经完成了一个嵌套表单，它通过JavaScript添加了属性列表，如下所示

我有一个

宴会

。通过

课程

和

用户

通过

参与

，它有许多

菜肴

。 每个用户都会得到类似这样的任务： 参与有许多

菜品

到

义务

我的问题是：为什么它不保存？宴会将保存，但嵌套的表单部分不会。。。 基本上，我想这是一个强参数的问题，或者它应该在控制器或模型中。所以我先把它们贴上。我粘贴了程序生成的HTML，只在最后粘贴了相关部分，这样问题就不会太长了。 谢谢

代码如下：

Class Feast < ActiveRecord::Base

mount_uploader :image, ImageUploader


has_many :participations, dependent: :destroy
has_many :users, :through => :participations

has_many :courses, dependent: :destroy
has_many :dishes, :through => :courses


accepts_nested_attributes_for :participations,
:allow_destroy => true

accepts_nested_attributes_for :courses,
:allow_destroy => true

类宴会：参与
有很多：课程，依赖：：破坏
有很多：菜，：到=>：菜
接受以下内容的\u嵌套\u属性\u:participations，
：allow_destroy=>true
接受：课程的\u嵌套\u属性\u，
：allow_destroy=>true

和参与：

class Participation < ActiveRecord::Base

  belongs_to :user
  belongs_to :feast

  has_many :obligations, dependent: :destroy
  has_many :dishes, :through=> :obligations
  has_many :groceries, :as => :needed 

  accepts_nested_attributes_for :obligations,
  :allow_destroy => true


end

课堂参与：义务
有很多：杂货，：as=>：需要
接受：义务的\u嵌套\u属性\u，
：allow_destroy=>true
终止

该计划是复杂的，因此在这个问题的最后我将发布为一名参与者、一道菜和一项作业（=义务）创建的HTML，这样就可以看到该计划运行良好

这是我的嵌套表单——它们的值由js更新和插入。 课程字段部分：

<%= link_to_function "remove","remove_fields_dish(this)", :class => "cl_both" %>    
<%new_object = Feast.reflect_on_association(:courses).klass.new%>
<%= f.fields_for(:courses, new_object, child_index: "new_course", class: "fields") do     
|fc| %>
    <%=fc.hidden_field(:dish_id)%> 
    <%=fc.hidden_field(:_destroy,value: false)%>
<%end%>

<%= link_to_function "remove","remove_fields_dish(this)", :class => "cl_both" %>    
 <%new_object = Feast.reflect_on_association(:participations).klass.new%>
 <%= f.fields_for(:participations, new_object , child_index: "new_course", class: "fields") do    
|fc| %>
    <%=fc.hidden_field(:dish_id)%> 
    <%=fc.hidden_field(:_destroy,value: false)%>
<%end%>

 <%new_object = Participations.reflect_on_association(:obligations).klass.new%>
 <%= fp.fields_for(:obligations, new_object , child_index: "new_obli", class:    
     "fields") do |fpo| %>
        <%= fpo.hidden_field(:dish_id) %> 
        <%= fpo.hidden_field(:_destroy,value: false) %>
     <%end%>

“两者都要”%>

部分参与领域：

<%= link_to_function "remove","remove_fields_dish(this)", :class => "cl_both" %>    
<%new_object = Feast.reflect_on_association(:courses).klass.new%>
<%= f.fields_for(:courses, new_object, child_index: "new_course", class: "fields") do     
|fc| %>
    <%=fc.hidden_field(:dish_id)%> 
    <%=fc.hidden_field(:_destroy,value: false)%>
<%end%>

<%= link_to_function "remove","remove_fields_dish(this)", :class => "cl_both" %>    
 <%new_object = Feast.reflect_on_association(:participations).klass.new%>
 <%= f.fields_for(:participations, new_object , child_index: "new_course", class: "fields") do    
|fc| %>
    <%=fc.hidden_field(:dish_id)%> 
    <%=fc.hidden_field(:_destroy,value: false)%>
<%end%>

 <%new_object = Participations.reflect_on_association(:obligations).klass.new%>
 <%= fp.fields_for(:obligations, new_object , child_index: "new_obli", class:    
     "fields") do |fpo| %>
        <%= fpo.hidden_field(:dish_id) %> 
        <%= fpo.hidden_field(:_destroy,value: false) %>
     <%end%>

“两者都要”%>

义务字段部分：

<%= link_to_function "remove","remove_fields_dish(this)", :class => "cl_both" %>    
<%new_object = Feast.reflect_on_association(:courses).klass.new%>
<%= f.fields_for(:courses, new_object, child_index: "new_course", class: "fields") do     
|fc| %>
    <%=fc.hidden_field(:dish_id)%> 
    <%=fc.hidden_field(:_destroy,value: false)%>
<%end%>

<%= link_to_function "remove","remove_fields_dish(this)", :class => "cl_both" %>    
 <%new_object = Feast.reflect_on_association(:participations).klass.new%>
 <%= f.fields_for(:participations, new_object , child_index: "new_course", class: "fields") do    
|fc| %>
    <%=fc.hidden_field(:dish_id)%> 
    <%=fc.hidden_field(:_destroy,value: false)%>
<%end%>

 <%new_object = Participations.reflect_on_association(:obligations).klass.new%>
 <%= fp.fields_for(:obligations, new_object , child_index: "new_obli", class:    
     "fields") do |fpo| %>
        <%= fpo.hidden_field(:dish_id) %> 
        <%= fpo.hidden_field(:_destroy,value: false) %>
     <%end%>

我的管制员宴请您的管制员：

class FeastsController < ApplicationController

 def list
   @user_feast_m=Feast.joins(participations: :user).where(participations: {manager:    
    true}).to_a
   @user_feast_p=Feast.joins(participations: :user).where(participations: {manager:    
    false}).to_a
 end

  def show
     @feast=feast.find(params[:id])
     @users=@feast.users
     @dishes=(Dish.joins(obligations: {participation: :feast}).where(feast:   
     {id:@feast.id }).to_a + @feast.dishes).compact
  end

  def new

    @feast= Feast.new
    @myself = User.find(session[:user_id])
     respond_to do |format| 
      format.html 
      format.js 
    end
  end  

  def create
    @feast = Feast.new(feast_params)
    if @feast.save
    flash[:notice]="the feast has been saved. all participants will get invitations and    
    assignments. hope they answer soon"
    redirect_to(:action=>'list')
    else
      render('new')
    end
 end

  def update
  end

  def edit
    @feast=feast.find(params[:id])
    @users=@feast.users.sort{|user1,user2| user2.manager <=>   
    user1.manager}.sort_by{|user| user.name}    
    @dishes=(Dish.joins(obligations: {participation: :feast}).where(feast:   
    {id:@feast.id }).to_a + @feast.dishes).compact
  end

  def delete
     @feast=Feast.find(params[:id])
  end

  def destroy
  end 


private 

   def feast_params
       params.require(:feast).permit(:id, :name, :image, :feast_place,    
       :feast_time,courses_attributes: [:id, 
       :dish_id,:_destroy,:feast_id],participations_attributes: [:id,:feast_id, 
       :user_id, :_destroy],obligations_attributes: [:id, :dish_id, :_destroy, 
       :participation_id])
   end

 end

class FeastsController'list'）
其他的
呈现（'新'）
终止
终止
def更新
终止
定义编辑
@feast=feast.find（参数[：id]）
@users=@feast.users.sort{| user1，user2 | user2.manager
user1.manager}.sort_by{| user | user.name}
@菜肴=（Dish.join（义务：{参与：：宴会}）。其中（宴会：
{id:@feast.id}）.to_a+@feast.diseases.compact
终止
def删除
@feast=feast.find（参数[：id]）
终止
def销毁
终止
私有的
def feast_params
参数require（：feast）.permit（：id，：name，：image，：feast\u place，
：宴会时间，课程属性：[:id，
：dish\u id、：\u destroy、：feast\u id]、参与度属性：[:id、：feast\u id、，
：user\u id，：\u destroy]，义务属性：[：id，：dish\u id，：\u destroy，
：参与（身份证）
终止
终止

这是生成的HTML：

 <form accept-charset="UTF-8" action="/feasts/create" enctype="multipart/form-data"     
   method="post"><div style="margin:0;padding:0;display:inline"><input name="utf8"    
 type="hidden" value="✓"><input name="authenticity_token" type="hidden" 
 value="llJ73mQ6yIZHKvs1EDHnVbjc1nIGlWN2eCirXwiCgCs="></div>

 #+> some input fields for the feast goes here
<br><br>
    <label for="feast_feast place">feast_place</label><br><br>
    <input id="feast_feast_place" name="feast[feast_place]" type="text"> <br><br>
    upload image file <br><br>
    <input id="feast_image" name="feast[image]" type="file"> <br><br>

<h2>participants

   <u>
        <a class="right" data-content="<br />
         <a class="cl_both" href="#"   
         onclick="remove_fields(this); return false;">remove</a>    

    <input id="feast_participations_user_id" name=";feast[participations][user_id]"   
    type="hidden" /> 
    <input id="feast_participations__destroy" name="feast[participations][_destroy]" 
    type="hidden" value="false" />
    <div data-obcontent='


    <input id="feast_participations_obligations_attributes_new_obli_dish_id" 
    name="feast[participations][obligations_attributes][new_obli][dish_id]"   
    type="hidden"/> 
    <input id="feast_participations_obligations_attributes_new_obli__destroy" 
    name="feast[participations][obligations_attributes][new_obli][_destroy]" 
    type="hidden" value="false" />





' >

    </div>



" href="#" id="try" onclick="add_par(); return false;">
     <img alt="Photo Gallery" height="100" src="/assets/add_participants.png"   
  width="100">

 </a>    </u>
  </h2> 

 <br><br><br>    

<div data-myid="3" data-myimage=""image":{"url:"/uploads/user/image/3/el4.jp"}}" data-   
 myname="elad bezalel" id="par">
    <table>
        <tbody><tr>
            <th>participant</th>
            <th>assignment</th>
        </tr>
        <tr><td><div class="user_block ui-droppable" style=""><a href="/users/show?  
                  id=7" id="1404733550784"><img alt="user picture" 
                  src="/uploads/user/image/7/Yemenite.gif" height="100" width="100">
                <br>amit</a><br>
                <a class="cl_both" href="#" onclick="remove_fields(this); return 
                false;">remove</a>  

                <input id="1404733550977" name="feast[participations][user_id]" 
                 type="hidden" value="7"> 



                <input id="1404733554049" name="feast[participations]
                [obligations_attributes][1404733554050][dish_id]" type="hidden" 
                 value="140473354199"> 

    <input id= "feast_participations_obligations_attributes_1404733554050__destroy"   
     name="feast[participations][obligations_attributes][1404733554050][_destroy]" 
     type="hidden" value="false">







        <input id="feast_participations__destroy" name="feast[participations]
        [_destroy]" type="hidden" value="false">
        <div data-obcontent="


        <input id="feast_participations_obligations_attributes_new_obli_dish_id"    
         name="feast[participations][obligations_attributes][new_obli][dish_id]"  
         type="hidden" ></div> 
        <input id="feast_participations_obligations_attributes_new_obli__destroy"   
        name="feast[participations][obligations_attributes][new_obli][_destroy]"  
        type="hidden" value="false" />





    ">

    </div>



    </div></td><td><dfn>e&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</dfn><img   
    alt="cancel - x" class="x-pic" height="30" src="/assets/x-blue.png" width="30"> 
    </td></tr></tbody></table>




  </div>
   <br><br><br><br><br><br>

 <h2>dishes
    <u>
         <a class="right" data-content="<br />
   <a class="cl_both" href='#' onclick='remove_fields_dish(this); return    
   false'>remove</a>    

    <input id="feast_courses_dish_id" name="feast[courses][dish_id]" type="hidden" /> 
    <input id="feast_courses__destroy" name="feast[courses][_destroy]"type="hidden"   
  value="false" />

" href="#" id="add_course" onclick="add_course(); return false;">
     <img alt="Photo Gallery" height="100" src="/assets/add_dish.png" width="100">
  </a>    </u>
  </h2> 

  <br><br><br>   

    <div id="course">
        <table>

            <tbody><tr><td><div class="dish_block ui-draggable ui-draggable-handle"    
     style="position: relative; top: 0px; left: 0px;"><a href="/dishes/show?id=9"   
     id="1404733541991"><img alt="dish picture"   
    src="/uploads/dish/image/9/IMG_0012.JPG" height="100" width="100"><br>e</a><br>

   <a class="cl_both" href="#" onclick="remove_fields_dish(this); return   
   false;">remove</a>   

    <input id="1404733542182" name="feast[courses][dish_id]" type="hidden" value="9"> 
    <input id="feast_courses__destroy" name="feast[courses][_destroy]" type="hidden"   
   value="false">

</div></td></tr></tbody></table>        
</div>  
 <br><br>
 <input name="commit" type="submit" value="initiate feast">
 </form>

#+>这里有一些宴会的输入字段



宴会地点





上载图像文件





参与者
“href=”id=“try”onclick=“add#u par（）；返回false；">

---

为什么嵌套部分不保存？

我不知道问题出在哪里，但我会做一些事情来调试并缩小问题范围：

• 在控制器中，

  提高宴会参数。检查

  。这符合您的期望吗
• 在

  rails控制台

  会话中，尝试创建嵌套模型（

  Feast.new（participations\u attributes:{…}）

  ）

所以这里是： 我尝试了2个插件，但它们都不起作用，所以我觉得我的插件出了问题 一般形式

我使用匹配的路线。当我改为休息路线时，一切都很好

可能是前一种形式的减容线：

   <%= form_for(:feast, :url => {:action => 'create'}) do |f| %>

{:action=>'create'}）do | f |%>

缺少@feast变量，因此它可以将嵌套部分附加到该变量中。 因此，也许有一种方法可以修复它，即使是匹配的路线，可能类似于：

   <%= form_for(:feast, @feast, :url => {:action => 'create'}) do |f| %>

{:action=>'create'}）do | f |%>

但是自从

---

我改为REST路由它工作，我不必检查。

问题是您没有与家长一起创建您的孩子记录。在控制器的

新
方法中，您应该有
@feast.participations.build
和
@feast.courses.build
。在rails中，rayn通过链接创建新的孩子记录。所以他写了，所以我现在试着在我的部分中这样做，但仍然不起作用……有什么想法吗？