ruby on rails - Why does my nested cocoon form not save the data? -

i'm new ruby on rails , desperately trying nested forms work. have created simple little app try make work using cocoon.

the idea to:

1. create nested "question" assigned "section"
2. when creating "section", nested "questions" should able added , associated section

currently able see fields question, enter in data, when click "submit". questions not saved database. not sure why, , not sure how add them,

so... here's code peruse:

my section form partial:

%h2 sections = semantic_form_for @section |f|   = f.inputs     = f.input :title      %hr     - @section.printquestions @section     %hr      %h3 questions     #questions     = f.semantic_fields_for :questions |question|       = render 'question_fields', :f => question     .links       = link_to_add_association 'add question', f, :questions, :data => {"association-insertion-method" => "after" }       %p      %input{type: 'submit', value: 'submit'} 

-- when submit clicked, section saved newly made questions not saved

the partial "questions" found within directory sections:

.question_fields   = f.inputs     %p       = f.label :question_text       %br       = f.text_area :question_text, :rows => 2, :cols => 40     %p       = f.label :answer_text       %br       = f.text_area :answer_text, :rows => 3, :cols => 60     = f.input :section_id, input_html: { readonly: true }     = link_to_remove_association "remove question", f 

model permissions:

class section < activerecord::base   has_many :questions   accepts_nested_attributes_for :questions end  class question < activerecord::base   belongs_to :section end   class questionscontroller < applicationcontroller   before_action :set_question, only: [:show, :edit, :update, :destroy]     ## rest auto-generated end   class sectionscontroller < applicationcontroller   before_action :set_section, only: [:show, :edit, :update, :destroy]     def section_params     params.require(:section).permit(:id, :title, :body, :good_opinion, :image_file_name, :questions_attributes [:id, :question_text, :answer_text, :section_id, :_destroy])     accepts_nested_attributes_for :questions   end end 

output when code run:

started patch "/sections/5" 127.0.0.1 @ 2014-03-25 00:01:24 -0400 processing sectionscontroller#update html   parameters: {"utf8"=>"√", "authenticity_token"=>"x6rdcamjurdlciewpotwskvqnrvvkgjv6fuzywmjrsy=", "section"=>{"id"=>"5", "title"=>"question text", "i mage_file_name"=>"image.png", "good_opinion"=>"0", "body"=>"body text", "questions_attributes"=>{"1395720076660"=>{"question_text"=>"qqqqqqqqqqqqqq",  "answer_text"=>"aaaaaaaaaaaaaa", "section_id"=>"5", "_destroy"=>"false"}}}, "id"=>"5"}   ←[1m←[35msection load (1.0ms)←[0m  select "sections".* "sections" "sections"."id" = ? limit 1  [["id", "5"]] unpermitted parameters: id, questions_attributes   ←[1m←[36m (0.0ms)←[0m  ←[1mbegin transaction←[0m   ←[1m←[35m (0.0ms)←[0m  commit transaction redirected http:5 completed 302 found in 46ms (activerecord: 1.0ms)