Form_for for nested objects

Rails
1

Hi,

I have the following data model:

  • Person (name, …)
  • Address (street, city)
  • Person has_ony Address

I would like to edit the Person and its Address in one single form.
Using form_for, I can add the person fields. Using fields_for, I could
have the Address also, but it’s not nested here (aka
person[address[street]]. So the question is how to “prefix” the
field_for to include the Address hash into the Person hash?

Thank you!

2

It doesn’t appear that you can do that. But, the solution is to take
care of the association in the create method.

See this example notice the use of a database transaction to properly
handle the rollback:
#—

Excerpted from “Agile Web D. with Rails, 2nd Ed.”

We make no guarantees that this code is fit for any purpose.

Visit http://www.pragmaticprogrammer.com/titles/rails2 for more book

information.
#—
class ProductsController < ApplicationController

def new
@product = Product.new
@details = Detail.new
end

def create
@product = Product.new(params[:product])
@details = Detail.new(params[:details])

Product.transaction do
  @details.product = @product
  @product.save!
  @details.save!
  redirect_to :action => :show, :id => @product
end

rescue ActiveRecord::RecordInvalid => e
@details.valid? # force checking of errors even if products
failed
render :action => :new
end

def show
@product = Product.find(params[:id])
end
end

On May 24, 11:24 am, Jerome D. [email protected]