Rails 4 - Nested form with accepts_nested_attributes_ for controller customization?

Question

I am trying to create a nested form with form_forand fields_for. After much research and success, no longer working on my project. I'm just trying to recreate railscast to see what I did wrong.

I am trying to recreate the example found at http://railscasts.com/episodes/196-nested-model-form-part-1 , which should not be so complicated as there is code, but I am unable to create the questions from the survey. Here is my code so far:

rails new surveysays
rails g scaffold survey name:string
rake db:migrate
rails g scaffold question survey_id:integer content:text
rake db:migrate

I am trying to make a video in the same sequence. My question model is:

class Question < ActiveRecord::Base
  belongs_to :survey
end

My survey model:

class Survey < ActiveRecord::Base
  has_many :questions, dependent: :destroy
  accepts_nested_attributes_for :questions
end

My survey form with fields of nested questions:

<%= form_for(@survey) do |f| %>
      ...
      <div class="field">
        <%= f.label :name %><br>
        <%= f.text_field :name %>
      </div>
      <%= f.fields_for :questions do |builder| %>
        <p>
          <%= builder.label :content, "Question" %><br/>
          <%= builder.text_area :content, :row => 3 %>
        </p>
      <% end %>
      <div class="actions">
        <%= f.submit %>
      </div>
   <% end %>

My poll shows:

<p id="notice"><%= notice %></p>

<p>
  <strong>Name:</strong>
  <%= @survey.name %>
</p>

<ol>
  <% for question in @survey.questions %>
   <li><%=h question.content%></li>
  <% end %>
</ol>

<%= link_to 'Edit', edit_survey_path(@survey) %> |
<%= link_to 'Back', surveys_path %>

And my SurveysController:

class SurveysController < ApplicationController
 ...

  # GET /surveys/new
  def new
    @survey = Survey.new
    3.times { @survey.questions.build }
  end

 ...

  # POST /surveys
  # POST /surveys.json
  def create
    @survey = Survey.new(survey_params)

    respond_to do |format|
      if @survey.save
        format.html { redirect_to @survey, notice: 'Survey was successfully created.' }
        format.json { render :show, status: :created, location: @survey }
      else
        format.html { render :new }
        format.json { render json: @survey.errors, status: :unprocessable_entity }
      end
    end
  end

  ...

  private
    # Use callbacks to share common setup or constraints between actions.
    def set_survey
       @survey = Survey.find(params[:id])
    end

    # Never trust parameters from the scary internet, only allow the white list through.
    def survey_params
       params.require(:survey).permit(:name)
    end
end

5:34, , , , , , create :

(Rails 4.1.6)  2.1.3: 001 > s = Survey.all     (3,0 ) "". * ""    = > #] >  2.1.3: 002 > q = s [0].     (0,6 ) "" . * "" "" . "Survey_id" =? [[ "survey_id", 2]]    = > #

. SurveysController - :

_: [: id,: content] survey_params @survey.questions.create(survey_params [: questions_attributes]) , survey.save , , : nill

. , , ? - , .

Answer 1

survey_params , :

def survey_params
 params.require(:survey).permit(:name, :questions_attributes => [:question, :answer ... or whatever attribute for the question model])
end

, !

Answer 2

survey_params , , :

def survey_params
   params.require(:survey).permit(:name)
end

def survey_params
  params.require(:survey).permit(:name, questions_attributes: [:id , :content])
end