gistfile1.rb

class Domain < ActiveRecord::Base
  attr_accessible :transport, :name
  
  belongs_to :company
  
  validates :name, new_domain: true, presence: true
end


  def create
    @company = Company.find(params[:company_id])
    @domain = @company.domains.build(params[:domain])

    respond_to do |format|
      if @domain.save
        format.html { redirect_to [@company, @domain], notice: 'Domain was successfully created.' }
        format.json { render json: [@company, @domain], status: :created, location: @domain }
      else
        format.html { render action: "new" }
        format.json { render json: @domain.errors, status: :unprocessable_entity }
      end
    end
  end