爲什麼accept_nested_attributes_for不適合我？ （rails 3）

Question

我在Rails 3應用程序上使用formtastic和haml。我正在嘗試爲調查和問題製作一個嵌套表單，但它不適合我。我觀看了railscast以及其上的所有內容，但似乎無法使其適用於我的應用程序。所以現在，我有以下幾點：

模式

class Survey < ActiveRecord::Base 
    attr_accessible :intro, :name, :pubdate, :enddate, :pubid 

    belongs_to :user 
    has_many :questions, :dependent => :destroy, :autosave => true 

    accepts_nested_attributes_for :questions, :allow_destroy => true 
end 

class Question < ActiveRecord::Base 

    belongs_to :survey 
    has_many :answers, :dependent => :destroy 

    attr_accessible :q_text, :order, :q_type 

end 

相關負責人方法

def update 
    @survey = Survey.find(params[:id]) 
    @user = current_user 
    if check_auth_and_redirect @user, @survey 
    if @survey.update_attributes(params[:survey]) 
     flash[:success] = "Survey Updated" 
     redirect_to edit_survey_path(@survey) 
    else 
     @title = "Editing Survey #{@survey.id}" 
     render 'edit' 
    end 
    end 
end 

意見

= semantic_form_for @survey do |f| 
    = render "shared/survey_inputs", :object => f 
    = f.inputs :for => :questions, :name => "Survey Questions" do |fq| 
    %hr 
    = fq.input :q_text, :label => "Question text" 
    = fq.input :q_type, 
       :label => "Question type", 
       :as => :select, 
       :collection => %w(text scale radio select) 
    = fq.input :order, :label => "Question order" 

表單呈現正確，但是當我更改問題並單擊保存時，記錄不反映我的更改。我有調試（params）打開，這裏是它回來爲：

--- !map:ActiveSupport::HashWithIndifferentAccess 
     utf8: "\xE2\x9C\x93" 
     _method: put 
     authenticity_token: CJCc9LvdoPjxwGJkhUnZjR0Z/c5Wt5VBT3bBr/wB4+A= 
     survey: !map:ActiveSupport::HashWithIndifferentAccess 
     name: This is my survey 
     intro: I've got a lovely bunch of coconuts. There they are all standing in a row. 
     pubid: smargdab 
     pubdate(1i): "" 
     pubdate(2i): "" 
     pubdate(3i): "" 
     enddate(1i): "" 
     enddate(2i): "" 
     enddate(3i): "" 
     questions_attributes: !map:ActiveSupport::HashWithIndifferentAccess 
      "0": !map:ActiveSupport::HashWithIndifferentAccess 
      q_text: one one one one one one one one one one one 
      q_type: text 
      order: "3" 
      id: "1" 
      "1": !map:ActiveSupport::HashWithIndifferentAccess 
      q_text: 2 2 2 2 2 2 2 2 2 2 
      q_type: text 
      order: "1" 
      id: "2" 
      "2": !map:ActiveSupport::HashWithIndifferentAccess 
      q_text: 3 3 3 3 3 3 3 3 3 3 
      q_type: text 
      order: "2" 
      id: "3" 
     commit: Update Survey 
     action: update 
     controller: surveys 
     id: "2" 

我在做什麼錯在這裏？我不想手動編寫這些屬性更改器！

Answer 1

我期待在使用accepts_nested_attributes_for我的一些舊的代碼，我認爲你需要做的是改變

attr_accessible :intro, :name, :pubdate, :enddate, :pubid 

到

attr_accessible :intro, :name, :pubdate, :enddate, :pubid, :questions_attributes 

Answer 2

我不允許attr_accessible的某些東西。問題是，我不知道該允許什麼。我認爲這是questions_attributes，但似乎並沒有這樣工作。