accepts_nested_attrinutes_for rails3.1rc4 - ruby

Question

I use accepts_nested_attributes_for in a model but my child form isn't saved in the database?
I am building a nested form almost in the same way as in episode 196 / 197 from Ryan Bates railscasts. I have a parent question form and as a child the answer form:
models/question.rb
class Question < ActiveRecord::Base
belongs_to :user
has_many :answers, :dependent => :destroy
accepts_nested_attributes_for :answers, :reject_if => lambda { |a| a[:text].blank? },
:allow_destroy => true
validates :content, :presence => true
end
models/answer.rb
class Answer < ActiveRecord::Base
belongs_to :question
belongs_to :user
end
controllers/questions_controller.rb
class QuestionsController < ApplicationController
before_filter :authenticate_user!
def index
setup_questions
end
def create
#question = Question.new(params[:question])
#this is to get every id_key from the user into the params of the answer
params[:question][:answers_attributes].keys.each {|key| params[:question][:answers_attributes][key][:user_id] = current_user.id }
#question.user_id = current_user.id
if #question.save
redirect_to questions_path, :notice => "Successfully created question."
else
setup_questions
render :index
end
end
def edit
#question = Question.find(params[:id])
end
def update
#question = Question.find(params[:id])
respond_to do |format|
if #question.update_attributes(params[:question])
format.html { redirect_to(#question, :notice => 'Question was successfully updated.') }
format.xml { head :ok }
else
format.html { render :action => "edit" }
format.xml { render :xml => #question.errors, :status => :unprocessable_entity }
end
end
end
def show
#question = Question.find(params[:id])
end
def destroy
#question = Question.find(params[:id])
#authorize! :destroy, #question
#question.destroy
redirect_to questions_path, :notice => "Successfully deleted question: #{#question.content}."
end
private
def setup_questions
#questions = Question.all
#question ||= Question.new
#question.answers.build #to build the answers form
end
end
views/question/_form.html.erb
<%= form_for(#question) do |f| %>
<!-- =================== -->
<!-- = Error handeling = -->
<% if #question.errors.any? %>
<div id="error_explanation">
<h2><%= pluralize(#question.errors.count, "error") %> prohibited this question from being saved:</h2>
<ul>
<% #question.errors.full_messages.each do |msg| %>
<li><%= msg %></li>
<% end %>
</ul>
</div>
<% end %>
<!-- =================== -->
<!-- ================= -->
<!-- = Question form = -->
<div class="field">
<%= f.label :content, "Question" %><br />
<%= f.text_field :content, :placeholder => "type your question here.." %>
</div>
<!-- ====================== -->
<!-- = Nested Answer form = -->
<div class="answer-field">
<%= f.fields_for :answers do |builder| %>
<%= builder.label :content, "Possible answer" %><br />
<%= builder.text_field :content, :placeholder => "type an optional answer.." %>
<% end %>
</div>
<!-- ====================== -->
<div class="actions">
<%= f.submit %>
</div>
<!-- ================= -->
<% end %>
So now the big question... Why doesn't it save anything from the answer field to the database? I thought one create action at the parent (question) should be enough and that the "accepts_nested_attributes_for" should take care of it's child(s).
Regards,
Thijs

Answer 1

1 Remove this line from controller
params[:question][:answers_attributes].keys.each {|key| params[:question][:answers_attributes][key][:user_id] = current_user.id }
2 add this into your view
<!-- = Nested Answer form = -->
<div class="answer-field">
<%= f.fields_for :answers do |builder| %>
<% builder.object.user = current_user %>
<%= builder.label :content, "Possible answer" %><br />
<%= builder.text_field :content, :placeholder => "type an optional answer.." %>
<%= builder.hidden_field, :user_id %>
<% end %>
</div>
<!-- ====================== -->