Newbie here, running rails 3.2.2 and ruby 1.8.7.
I have 2 models, Hotel and Facility, they both have have_one abd
belongs_to with foriegn jey created correctly.
The goal is, in a single form have displayed info. of both Hotel and
Facility. I’ve seen nested forms but i always get the same error.
I am able to display the form correctly, but when i try to save, this
shows up:
ActiveModel::MassAssignmentSecurity::Error in HotelsController#create
Can’t mass-assign protected attributes: @hotel
app/controllers/hotels_controller.rb:60:in new' app/controllers/hotels_controller.rb:60:increate’
However, my models are:
class Hotel < ActiveRecord::Base
has_one :facility, :dependent => :destroy
accepts_nested_attributes_for :facility, :allow_destroy => true
attr_accessible :name, :rating, :recommended, :facility_attributes
end
class Facility < ActiveRecord::Base
belongs_to :hotel
attr_accessible :room24h, :concierge, :hotel_id
#attr_accessible :concierge, :hotel_id, :room24h, :hotel
end
My facility controller is empty, and my hotel_controller new /create is:
def new
@hotel = Hotel.new
@facility = @hotel.build_facility
respond_to do |format|
format.html # new.html.erb
format.json { render :json => @hotel }
end
end
def create
@hotel = Hotel.new(params[:hotel]).facility.new(params[:facility])
respond_to do |format|
if @hotel.save
format.html { redirect_to @hotel, :notice => 'Hotel was
successfully created.’ }
format.json { render :json => @hotel, :status => :created,
:location => @hotel }
else
format.html { render :action => “new” }
format.json { render :json => @hotel.errors, :status =>
:unprocessable_entity }
end
end
end
Then when i click create, the error I wrote earlier happens. Why? I
believe have all the necessary attr_accessible fields 
Any tips? Thanks, I’m deeply stuck