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

rubyonrails-talk
1

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.

2

google "rails 1 form 2 models"

3

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.

4

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