ruby - Rails nested form creation -

i have app in want create nested form

my models:

class abonent < activerecord::base     belongs_to :town     has_many :numbers, :dependent => :destroy      accepts_nested_attributes_for :numbers end  class number < activerecord::base     belongs_to :abonent end 

abonents controller:

class abonentscontroller < applicationcontroller   def new     @abonent = abonent.new end  def create     @abonent = abonent.new abonents_params     if @abonent.save         redirect_to :towns     else         render action: "new"     end end  private    def abonents_params     params.require(:abonents).permit( :fullname, :work_position, :department, :email, :town_id, numbers_attributes: [ :phone ] )  end  end 

and abonents view

<hr><br>  <%= form_for :abonents, url: abonents_path |f| %>   <%= f.label :fullname %>:   <%= f.text_field :fullname %><br /> <br />     <%= f.label :work_position %>:   <%= f.text_field :work_position %><br /><br />     <%= f.label :department %>:   <%= f.text_field :department %><br /><br />     <%= f.label :email %>:   <%= f.text_field :email %><br /><br />     <%= f.label :town_id %>:   <%= f.select :town_id, town.all.collect { |p| [ p.ru_name, p.id ] } %><br /><br />     <%= f.fields_for :numbers |phones|%>     <%= phones.label :phone %>:     <%= phones.text_field :phone %><br /><br />     <% end %>     <%= f.submit %> <% end %> 

the problem when submit form, creates abonent, doesn't create number abonent.

i saw many different manuals , couldn't find error in code. please help. thank you.

upd added repo on github problem.

you need build associated records

def new   @abonent = abonent.new   @abonent.numbers.build end