ruby on rails 4 - cannot save data using a nested form with the cocoon gem -

i having trouble saving data using nested form cocoon gem, , haven't been able find solution on so.

i have 2 models: requests has_many votes.

i create single form saves new request, , new vote simultaneously. issue neither new request nor new vote saved using below code. i've pasted terminal output below completeness.

terminal output:

started post "/requests" ::1 @ 2015-06-25 15:41:17 +0100 processing requestscontroller#create html   parameters: {"utf8"=>"✓", "authenticity_token"=>"fchco1rlg2zr6mo8mpmvnmeasvpraqyhay5d2sdrldun83ppnsrhquu33yioz84c4z1xmyqi4gzjlymn1nl3fw==", "request"=>{"firstname"=>"sdf", "lastname"=>"sf", "email"=>"sdf@lskdjf.com", "request"=>"lskdj", "description"=>"sldkjf", "votes_attributes"=>{"1435243272926"=>{"comment"=>"sadflkj", "email"=>"lkfj@sldk.com", "beta"=>"1", "_destroy"=>""}}}, "commit"=>"save"}    (0.2ms)  begin transaction   vote exists (0.2ms)  select  1 one "votes" lower("votes"."email") = lower('lkfj@sldk.com') limit 1   request exists (0.1ms)  select  1 one "requests" lower("requests"."email") = lower('sdf@lskdjf.com') limit 1    (0.1ms)  rollback transaction   rendered requests/_vote_fields.html.haml (0.9ms)   rendered requests/_vote_fields.html.haml (1.0ms)   rendered requests/_form.html.haml (8.4ms)   rendered requests/new.html.erb within layouts/application (9.2ms)  completed 200 ok in 118ms (views: 105.8ms | activerecord: 0.5ms) 

models:

class request < activerecord::base   has_many :votes, dependent: :destroy   accepts_nested_attributes_for :votes end  class vote < activerecord::base   belongs_to :request end 

requests controller

class requestscontroller < applicationcontroller before_action :set_request, only: [:show, :edit, :update, :destroy]  def create   @request = request.new(request_params)    if @request.save      redirect_to @request    else      render 'new'    end end  private  def set_request    @request = request.find(params[:id])  end   def request_params    params.require(:request).permit(             :id, :firstname, :lastname, :email, :request, :description, :votes, :tag_list,             votes_attributes: [:firstname, :lastname, :email, :comment, :beta, :id, :_destroy] )  end  end 

requests/_form.html

= form_for(@request) |f|   .field= f.text_field :firstname, placeholder: "requester firstname"   .field= f.text_field :lastname, placeholder: "requester lastname"   .field= f.text_field :email, placeholder: "email"   .field= f.text_field :request, placeholder: "request"   .field= f.text_field :description, placeholder: "description"    #votes     = f.fields_for :votes |vote|       = render 'votes/vote_fields', :f => vote     .links       = link_to_add_association 'add vote', f, :votes, :render_options => { :wrapper => 'inline' }, partial: 'votes/vote_fields'    .action= f.submit "save" 

requests/_votes_fields.html.haml

.nested-fields   .form-inline     = f.text_field :comment, :placeholder => 'comment'     = f.text_field :email, :placeholder => 'email'     = f.check_box :beta, :placeholder => 'beta', :as => :boolean     .links       = link_to_remove_association "remove vote", f 

votes , model validations:

vote.rb  belongs_to :request  before_save { self.email = email.downcase } #to ensure email uniqueness  validates :email, presence: true, length: { maximum: 250 }, uniqueness: { case_sensitive: false }  validates :request_id, presence: :true  request.rb  belongs_to :user  has_many :votes, dependent: :destroy  accepts_nested_attributes_for :votes  before_save { self.email = email.downcase }  validates :request, presence: true  validates :firstname, presence: true, length: { maximum: 50 }  validates :lastname, presence: true, length: { maximum: 50 }  validates :email, presence: true, length: { maximum: 250 }, uniqueness: { case_sensitive: false }  acts_as_taggable