Can't mass-assign protected attributes: job

job.rb

# == Schema Information
#
# Table name: jobs
#
#  id            :integer          not null, primary key
#  restaurant_id :integer
#  shortname     :string(255)
#  user_id       :integer
#  created_at    :datetime         not null
#  updated_at    :datetime         not null
#

class Job < ActiveRecord::Base
  attr_accessible :restaurant_id, :shortname, :user_id

  belongs_to    :user
  belongs_to    :restaurant
  has_many      :shifts


  validates :shortname, presence: false
  
end

new.html.erb

<% provide(:title, 'Restaurant') %>

      <%= form_for @restaurant do |f| %>
            <%= render 'shared/error_messages' %>

            <%= f.label "Restaurant Name" %>
            <%= f.text_field :name %>

            <%= f.fields_for :job do |child_f| %>

                  <%= child_f.label "Nickname" %>
                  <%= child_f.text_field :shortname %>
            
            <% end %>

            <%= f.submit "Done", class: "btn btn-large btn-primary" %>

      <% end %>

restaurant.rb

# == Schema Information
#
# Table name: restaurants
#
#  id         :integer          not null, primary key
#  name       :string(255)
#  created_at :datetime         not null
#  updated_at :datetime         not null
#

class Restaurant < ActiveRecord::Base
  attr_accessible :name, :job_attributes

  has_many    :jobs
  has_many    :users, :through => :jobs
  has_many    :positions

  accepts_nested_attributes_for :jobs, :allow_destroy => true

  validates :name, presence: true

end

restaurants_controller.rb

class RestaurantsController < ApplicationController

  before_filter :logged_in, only:  [:new_restaurant]

  def new
    @restaurant = Restaurant.new
    @user = current_user
    @restaurant.jobs.build
  end

  def create
    @restaurant = Restaurant.new(params[:restaurant])
    if @restaurant.save
      flash[:success] = "Restaurant created."  
      redirect_to welcome_path
    end
  end

end