ruby on rails - dynamic nested form always creates an extra blank entry - using formtastic_coocoon -

i'm using formtastic & formtastic_cocoon created nested form.

all seems working dynamically adding nested form existing form, 1 exception.

i have users , users have entries.

when create user, , add entry, end

 -user    - entry (empty)    - entry test 1 

i should have

 -user    - entry test 1 

i'm not sure why blank entry showing up.

my models are

 class user < activerecord::base    validates :name, :presence => true    has_attached_file :photo     has_many :tasks, :dependent => :destroy     accepts_nested_attributes_for :tasks, :allow_destroy => true  end  class task < activerecord::base    attr_accessible :entry     belongs_to :user   end 

my create controller (i think right controller)

   def create     @user = user.new(params[:user])     if @user.save       flash[:notice] = "successfully created user."       redirect_to @user     else       render :action => 'new'     end   end   def create     @task = task.new(params[:task])     if @task.save       flash[:notice] = "successfully created task."       redirect_to @task     else       render :action => 'new'     end   end 

the empty entries showing in database, don't think problem html.erb files, can post here if help.

turns out may issue way formtastic_cocoon handles forms.

when looking @ html source, nested form in page, hidden.

i changed model

 accepts_nested_attributes_for :tasks, :reject_if=> proc {|attributes| attributes[:entry].blank?}, :allow_destroy => true