Ruby on rails Rails 4：如何将具有强参数的嵌套属性传递到模型中

我这里有两个嵌套的资源。储藏和接收器

routes.rb

resources :stashes do
  resources :receivers
end

def create
  receiver = Receiver.create_receiver(current_user, stash_params)
  if receiver.id
    @stash = Stash.create_stash(current_user, stash_params, receiver)
    if @stash.id
      flash[:success] = "Stash Started!"
      redirect_to stashes_url(@stash), :notice => "Stash Started!"
    else
      render :action => "new", :notice => "Error, try that again"
    end
  end
end

def self.create_receiver(current_user, stash_params)
  Receiver.create!(
    :first_name => stash_params[:first_name],
    :last_name => stash_params[:last_name],
    :user_id => current_user
  )
end

我有一个表单，我想在提交后创建一个隐藏和一个接收者

<%= form_for(@stash) do |f| %>
  <h2>Who is this Stash for?</h2>
  <div class="reciever-wrap">
    <%= f.fields_for @receiver do |builder| %>
      <div><%= builder.label :first_name %><br />
      <%= builder.text_field :first_name, :autofocus => true %></div>

      <div><%= builder.label :last_name %><br />
      <%= builder.text_field :last_name %></div>

    <% end %>
   <div class="self-check">
      <%= check_box_tag(:self) %>
      <%= label_tag(:self, "This stash is for me") %></div>
  </div>

  <div><%= f.label :occasion, "Is this stash for an occassion?" %><br />
  <%= f.text_field :occasion %></div>

  <div><%= f.label :initial_amount, "How much would you like to spend?" %><br />
  <%= f.text_field :initial_amount %></div>

  <div><%= f.label :length, "How long would you like this Stash to last?" %><br />
  <%= select_tag(:length, options_for_select([['3 Months', 1],['6 Months', 2],['1 Year']])) %>    </div>

  <div><%= f.submit "Start adding gifts to this Stash!", :class => "button" %></div>
<% end %>

我还在底部定义了隐藏参数：

def stash_params
  params.require(:stash).permit(
    :intitial_amount,
    :length,
    :user_id,
    :first_name,
    :last_name,
    :id,
    :receivers_attributes => [:id, :first_name, :last_name])
end

我可以创建一个储藏室，没问题。但是，当我去创建接收器时，我遇到了麻烦。系统正在创建新的接收方记录，但表单中的任何数据都没有被存储。我猜这与无法访问嵌套的强参数数据有关

这是接收器模型中的create_receiver方法，它应该保存数据，但由于某些原因没有保存数据。我能够保存当前的用户数据，所以这很好。只有来自强属性的数据未被保存：

接收器.rb

resources :stashes do
  resources :receivers
end

def create
  receiver = Receiver.create_receiver(current_user, stash_params)
  if receiver.id
    @stash = Stash.create_stash(current_user, stash_params, receiver)
    if @stash.id
      flash[:success] = "Stash Started!"
      redirect_to stashes_url(@stash), :notice => "Stash Started!"
    else
      render :action => "new", :notice => "Error, try that again"
    end
  end
end

def self.create_receiver(current_user, stash_params)
  Receiver.create!(
    :first_name => stash_params[:first_name],
    :last_name => stash_params[:last_name],
    :user_id => current_user
  )
end

我是否需要遍历stash_参数来访问嵌套的receiver_参数属性？我不确定应该如何访问模型中的嵌套属性。非常感谢您的帮助

---

我还尝试将此创建方法移动到隐藏模型中，以查看是否可以从那里访问属性，但也没有成功。

您的模型中可能缺少

接受嵌套的属性


更新#1

既然您已经声明为

包含了

接受\u嵌套的\u属性，\u，我建议您将控制器逻辑整合为

def create
  @stash = Stash.new(stash_params)
  @stash.user = current_user
  @stash.receivers.each { |r| r.user = current_user }

  if @stash.save
      flash[:success] = "Stash Started!"
      redirect_to stashes_url(@stash), :notice => "Stash Started!"
    else
      render :action => "new", :notice => "Error, try that again"
    end
  end
end

通过这种方式，您不必检查是否保存了单个记录，并且强参数应该正常运行
因为您使用的是嵌套属性，所以您应该在
创建
操作中尝试以下操作：

def create
  stash = Stash.new(stash_params)
  if stash.save
    flash[:success] = "Stash Started!"
    redirect_to stashes_url(@stash), :notice => "Stash Started!"
  else
    render :action => "new", :notice => "Error, try that again"
  end
end

这就完成了保存存储和接收器所需的所有工作<代码>接受

的_嵌套_属性_确保所属对象将被保存，并在保存父对象的同时从父对象接收正确的id。

谢谢，Kyle。在接收器和存储模型中，我确实为提供了

接受\u嵌套的\u属性。这是我检查的第一件事！我在
@stash.receivers上得到一个错误。这里的每个
方法。我相信这是因为接收器还没有被创造出来。我遇到的这个问题是访问接收器模型中的接收器参数。