Ruby on Rails : Updating multiple models in a single form - ruby-on-rails

Question

I have 3 models User, House and Order.
Order Model
class Order < ActiveRecord::Base
belongs_to :from_house, :class_name => "House"
belongs_to :to_house, :class_name => "House"
belongs_to :user
accepts_nested_attributes_for :from_house, :to_house, :user
end
My House Model.
class House < ActiveRecord::Base
belongs_to :user
belongs_to :place
belongs_to :city
end
My user model.
class User < ActiveRecord::Base
has_many :orders
has_many :houses
end
In my order form I have something like this
<%= form_for #order do |f| %>
... # order fields
<%= f.fields_for :user do |i| %>
... # your from user forms
<% end %>
<%= f.fields_for :from_house do |i| %>
... # your from house forms
<% end %>
<%= f.fields_for :to_house do |i| %>
... # your to house forms
<% end %>
...
<% end %>
I haven't changed much in controller from the default. The controller code
def create
#order = Order.new(order_params)
respond_to do |format|
if #order.save
format.html { redirect_to #order, notice: 'Order was successfully created.' }
format.json { render action: 'show', status: :created, location: #order }
else
format.html { render action: 'new' }
format.json { render json: #order.errors, status: :unprocessable_entity }
end
end
def order_params
params.require(:order).permit( :shift_date, user_attributes: [:name, :email, :ph_no], from_house_attributes: [:place_id, :floor, :elevator, :size], to_house_attributes: [:place_id, :floor, :elevator])
end
When I submit the form, as expected a Order gets created with a new from_house and to_house along with a new user. But however my user_id in house table remains NULL. How can I make the houses(both from and to) reference the user created after submit.
The User is not logged in, So there is no current_user. We have to create a new user based on the details given. That user has to be associated with the houses (from and to).
I hope I'm clear. If not please let me know.
P.S: This question is an extension to this Ruby on rails: Adding 2 references of a single model to another model

Answer 1

I think this change in app/models/order.rb should do the trick:
class Order < ActiveRecord::Base
belongs_to :user
belongs_to :from_house, class_name: 'House'
belongs_to :to_house, class_name: 'House'
accepts_nested_attributes_for :user, :from_house, :to_house
validates :user, :from_house, :to_house, presence: true
def from_house_attributes=(attributes)
fh = build_from_house(attributes)
fh.user = self.user
end
def to_house_attributes=(attributes)
th = build_to_house(attributes)
th.user = self.user
end
end
Now, try this in your Rails console:
params = { user_attributes: { name: 'New name', email: 'name#example.com' }, from_house_attributes: { name: 'From house name' }, to_house_attributes: { name: 'to house name' } }
o = Order.new(params)
o.save
o.from_house
o.to_house
Cheers!