auditions_controller.rb

audition.rb

class Audition < ActiveRecord::Base
  attr_writer :current_step
  attr_accessor :brand
  before_create :audition_time
  belongs_to :category

  has_many :prices

  has_many :specifications
  accepts_nested_attributes_for :specifications, reject_if: :all_blank, allow_destroy: true


  def current_step
    @current_step || steps.first
  end

  def steps
    %w[name_categories  descriptions]
  end

  def next_step
    self.current_step = steps[steps.index(current_step)+1]
  end

  def previous_step
    self.current_step = steps[steps.index(current_step)-1]
  end

  def first_step?
    current_step == steps.first
  end

  def last_step?
    current_step == steps.last
  end

  def all_valid?
    steps.all? do |step|
      self.current_step = step
      valid?
    end
  end





  # return wholesales price of single product when specified number of products
  # n_products - number of products
  def price_of(n_products)
    p_price=0.0
    prices.each do |p|
        p_price=p.price if(n_products>=p.quantity_from)
      end
    return p_price
  end



  private

  def audition_time
    empieza = DateTime.now.strftime("%d/%m/%Y")
    timeout = DateTime.now. + 30.day
    termina = timeout.strftime("%d/%m/%Y")

    self.timestart =  empieza
    self.timeend   =  termina
  end

  def activare
    self.active =1
  end


end

auditions_controller.rb

class AuditionsController < ApplicationController

  def index

    @auditions = Audition.all


  end

  def new
    @auditions = Audition.new
    @auditions.specifications.build

  end

  def create
    @auditions = Audition.new(audition_params)
    if @auditions.save
      respond_to do |format|
        format.html { redirect_to root_path, notice: "New created: #{@auditions.titulo}"}
      end
    else
      redirect_to new_audition_url
    end
  end

  def subcategories_by_category

    @sub   = Category.subs(params[:sub]).map { |sub| [sub.name, sub.id] }
    @child = Category.subs(params[:subs]).map { |sub| [sub.name, sub.id] }

    #.map { |sub| [ sub.name , sub.id] }

    respond_to do |format|
      format.js
    end
  end


  private

  def audition_params
    params.require(:audition).permit(:titulo, :descripcion,
                                     specifications_attributes: [:brand]
                                      )
  end

  def specsificacions
    #for test
    params.require(:specifications).permit(:brand)
  end


end

new.html.erb

<div class="frm_imp">
<%= form_for (@auditions) do |f| %>

      <%= f.text_field :titulo %>
      <%= f.text_field :descripcion %>

      <%= fields_for :specifications  do |specifications| %>
          <%= specifications.text_field :brand %>
      <% end %>

      <%= f.submit %>

<% end %>
</div>