Ruby on Rails Saving in two tables from one form

Question

I have two models Hotel and Address. Relationships are:

class Hotel
  belongs_to :user
  has_one    :address
  accepts_nested_attributes_for :address
         


        

Answer 1

You are using wrong method for appending your child with the parent.And also it is has_one relation,so you should use build_model not model.build.Your new and create methods should be like this

class HotelsController < ApplicationController
  def new
    @hotel = Hotel.new
    @hotel.build_address #here
  end

  def create
    @hotel = current_user.hotels.build(hotel_params)

    if @hotel.save      
      flash[:success] = "Hotel created!"
      redirect_to @hotel
    else
      render 'new'      
    end    
  end

Update

Your hotel_params method should look like this

def hotel_params
   params.require(:hotel).permit(:title, :stars, :room, :price,address_attributes: [:country,:state,:city,:street])
end

Answer 2

You should not build address again

class HotelsController < ApplicationController
  def new
    @hotel = Hotel.new
  end

  def create
    @hotel = current_user.hotels.build(hotel_params)
    # address = @hotel.address.build 
    # the previous line should not be used
    if @hotel.save      
      flash[:success] = "Hotel created!"
      redirect_to @hotel
    else
      render 'new'      
    end    
  end

Answer 3

Bottom line here is you need to use the f.fields_for method correctly.

--

Controller

There are several things you need to do to get the method to work. Firstly, you need to build the associated object, then you need to be able to pass the data in the right way to your model:

#app/models/hotel.rb
Class Hotel < ActiveRecord::Base
   has_one :address
   accepts_nested_attributes_for :address
end

#app/controllers/hotels_controller.rb
Class HotelsController < ApplicationController
    def new
       @hotel = Hotel.new
       @hotel.build_address #-> build_singular for singular assoc. plural.build for plural
    end

    def create
        @hotel = Hotel.new(hotel_params)
        @hotel.save
    end

    private

    def hotel_params
        params.require(:hotel).permit(:title, :stars, :room, :price, address_attributes: [:each, :address, :attribute])
    end
end

This should work for you.

--

Form

Some tips for your form - if you're loading the form & not seeing the f.fields_for block showing, it basically means you've not set your ActiveRecord Model correctly (in the new action)

What I've written above (which is very similar to that written by Pavan) should get it working for you