1 Form > 2 Models > 2nd Model Requres 1st Model ID

Hey Everyone,

So I have one form that submits information to create 2 models (A, B).
I need the ID of model A to be inserted into model B. But the ID isn't
created until it hits the database (auto_increment). But if for some
reason either item cannot be created or saved I want to abort the
whole operation.

Whats the best method to do this ?

thanks.

google "rails 1 form 2 models"

I can handle building two models from 1 form. It's getting the id from
the first saved model and inserting it in the second and rolling back
the whole transaction if anything goes wrong that is the problem.

Thanks everyone for your suggestions.

This is what I came up with I was looking for some feedback. It works
fine but I figure I might be doing something long winded. This is my
first go at an actual railsApp other then book demos. Any feedback
would be nice!

// new.html.erb
<h1>New word</h1>

<%= error_messages_for :word, :definition %>

<% form_for(@word) do |f| %>

  <p>
    <%= f.label :word %><br />
    <%= f.text_field :word %>
  </p>
  <p>
    <%= f.label :was_created_by %><br />
    <%= f.check_box :was_created_by %>
  </p>

  <% fields_for(:definition, @definition) do |i| %>
    <p>
      <%= i.label :definition %><br />
      <%= i.text_area :definition %>
    </p>
    <p>
      <%= i.label :word_type %><br />
      <%= i.text_field :word_type %>
    </p>
    <p>
      <%= i.label :pronounciation %><br />
      <%= i.text_field :pronounciation %>
    </p>
    <p>
      <%= i.label :origin %><br />
      <%= i.text_area :origin %>
    </p>
    <p>
      <%= i.label :is_profain %><br />
      <%= i.check_box :is_profain %>
    </p>
  <% end %>
  <p>
    <%= submit_tag 'Create' %>
  </p>
<% end %>

<%= link_to 'Back', words_path %>

// words_controller.rb
  def create

    @client_ip = request.remote_ip

    begin
      ActiveRecord::Base.transaction do
        @word = Word.new(params[:word].merge(:ip_address =>
@client_ip, :user_id => '1'))
        @word.save
        @definition = Definition.new(params[:definition].merge
(:ip_address => @client_ip,
                                                                :user_id
=> '1',
                                                                :word_id
=> @word.id,
                                                                :status
=> 'published'))
       @definition.save
    end
    rescue ActiveRecord::RecordInvalid => invalid
      flash[:notice] = 'Word was not created'
      render :action => "new"
    end

    redirect_to(@word)
  end