Fields_for has_many associations not saving - ruby-on-rails

Question

So I have a deeply nested association among Polls, Questions, and Answers:
class Poll < ActiveRecord::Base
attr_accessible :description, :end_time, :start_time, :title, :user_id, :questions_attributes, :is_live
belongs_to :user
has_many :questions, :dependent => :destroy
# This is the plularized form of sms, it's not smss
has_many :sms, :through => :questions
has_many :feedbacks
accepts_nested_attributes_for :questions, :reject_if => lambda { |a| a[:content].blank?}, :allow_destroy => true
end
class Question < ActiveRecord::Base
attr_accessible :poll_id, :title, :answer_attributes
belongs_to :poll
has_many :answers, :dependent => :destroy
# THis is the plularized form of sms, it's not smss
has_many :sms
#If someone creates a form with a blank question field at the end, this will prevent it from being rendered on teh show page
accepts_nested_attributes_for :answers, :reject_if => lambda { |a| a[:content].blank?}, :allow_destroy => true
end
class Answer < ActiveRecord::Base
attr_accessible :is_correct, :question_id, :title
belongs_to :question
end
And am trying to save all objects in a single fields_for form like so.
= form_for #poll, :class=>'create-poll-form' do |f|
= f.text_field :title, :autofocus => true, :placeholder => "Poll Title"
= f.text_field :description, :placeholder => 'Description'
= f.fields_for :questions do |builder|
= render "questions/question_fields", :f => builder
= f.submit "Create Poll", :class => 'btn btn-danger'
Questions Partials
%p
= f.label :title, "Question"
= f.text_field :title
= f.check_box :_destroy
= f.label :_destroy, "Remove Question"
%p
= f.fields_for :answers do |builder|
= render "answers/answer_fields", :f => builder
Answers Partial
%p
= f.label :title, "Answer"
= f.text_field :title
= f.check_box :_destroy
= f.label :_destroy, "Remove Answer"
Yet the PollsController isn't persisting the data:
def create
binding.pry
#poll = current_user.polls.new(params[:poll])
# #poll = Poll.create(params[:poll])
binding.pry
#poll.save!
redirect_to root_path
end
def new
#poll = Poll.new
1.times do
question = #poll.questions.build
2.times {question.answers.build}
end
end
Any tips here would be amazing, I've been working on this for a bit and it's stumping me! Thanks in advance!
Also here's the server log:
Started POST "/polls" for 127.0.0.1 at 2013-06-06 20:14:47 -0400
Processing by PollsController#create as HTML
Parameters: {"utf8"=>"✓", "authenticity_token"=>"hk+KuNsTLx3sH9pE7Mf8XETGsmxTsRN4/tWUBn3CIVE=", "poll"=>{"title"=>"Testing 1-2-1-2", "description"=>"Up on the mic", "questions_attributes"=>{"0"=>{"title"=>"Cake or Death?", "_destroy"=>"0", "answers_attributes"=>{"0"=>{"title"=>"Cake", "_destroy"=>"0"}, "1"=>{"title"=>"Death", "_destroy"=>"0"}}}}}, "commit"=>"Create Poll"}
User Load (0.3ms) SELECT "users".* FROM "users" WHERE "users"."id" = 1 LIMIT 1
Question Load (0.5ms) SELECT "questions".* FROM "questions" WHERE "questions"."poll_id" IS NULL
(0.3ms) BEGIN
SQL (47.6ms) INSERT INTO "polls" ("created_at", "description", "end_time", "is_live", "start_time", "title", "updated_at", "user_id") VALUES ($1, $2, $3, $4, $5, $6, $7, $8) RETURNING "id" [["created_at", Fri, 07 Jun 2013 00:16:46 UTC +00:00], ["description", "Up on the mic"], ["end_time", nil], ["is_live", nil], ["start_time", nil], ["title", "Testing 1-2-1-2"], ["updated_at", Fri, 07 Jun 2013 00:16:46 UTC +00:00], ["user_id", 1]]
(0.8ms) COMMIT
Redirected to http://localhost:3000/
Completed 302 Found in 170668ms (ActiveRecord: 54.9ms)

Answer 1

I'm not sure if this is the problem but in your
class Question < ActiveRecord::Base
attr_accessible :poll_id, :title, :answer_attributes
but in your log file it has
Parameters: {"utf8"=>"✓", "authenticity_token"=>"hk+KuNsTLx3sH9pE7Mf8XETGsmxTsRN4/tWUBn3CIVE=", "poll"=>{"title"=>"Testing 1-2-1-2", "description"=>"Up on the mic", "questions_attributes"=>{"0"=>{"title"=>"Cake or Death?", "_destroy"=>"0", "answers_attributes"=>{"0"=>{"title"=>"Cake", "_destroy"=>"0"}, "1"=>{"title"=>"Death", "_destroy"=>"0"}}}}}, "commit"=>"Create Poll"}
The difference being :answers_attributes, rather than :answer_attributes i.e. answer vs answer*s
This may be causing the data to be thrown away.