new/create with multiple embedded models

[Daniel Peck]

Hi all,
I'm trying to build a simple event registration function and having some trouble figuring the best way to make it work.  Code isn't too clean as Ive been hacking at it for a while trying to figure out how to make this work.  Registration options (such as, attend lunch, attend dinner, purchase tshirt, etc) are built in the new function and everything seems to work great, but when posted to the create method, only one registration_option is present:

[3] pry(#<RegistrationsController>)> params
=> {"utf8"=>"✓",
 "authenticity_token"=>"35ZkbkCGZiiTEgw8Pn/nKnt0mCPTyCl0Lxks4koSOkM=",
 "registration_options"=>{"attending"=>"0"},
 "registration"=>
  {"event_id"=>"4f7e669ebf73141072000005",
   "stripe_card_token"=>"tok_PhjUuOtMf8jayw",
   "email"=>"f...@bar.com"},
 "action"=>"create",
 "controller"=>"registrations"}


Is there a best practice/good example to build from on creating/persisting documents with multiple embedded documents?  And what am I doing incorrectly with this to make only a single registration_option being posted?  Model definitions and code below.  Thanks for any help.



Models:

class Registration
        include Mongoid::Document
        include Mongoid::Timestamps

        field :email
        field :total, type: Integer
        field :stripe_card_token

embeds_many :registration_options

class RegistrationOption
        include Mongoid::Document

        field :shortname
        field :description
        field :price, type: Integer
        field :attending, type: Integer
        field :required, type: Boolean
        field :min_required, type: Integer
        field :free_count, type: Integer

        embedded_in :registration
end


Controller:

class RegistrationsController < ApplicationController

        def new
                event = Event.find(params[:event_id])
                @registration = event.registrations.build
                event.event_options.each do |opt|
                        @registration.registration_options.build(shortname: opt.shortname, description: opt.description, price: opt.price, required: opt.required, attending: opt.default_attending, free_count: opt.free_count )
                end
        end

       
def create
  @registration = Registration.new(params[:registration])
  if @registration.save_and_process
    redirect_to @registration, :notice => "Thank you for registrering!"
  else
    render :new
  end
end

def show
        @registration = Registration.find(params[:id])
end

end


View:
<h1>Signing up for <%= @registration.event.name %></h1>

<%= form_for @registration do |f| %>
  <% if @registration.errors.any? %>
    <div class="error_messages">
      <h2><%= pluralize(@registration.errors.count, "error") %> prohibited this subscription from being saved:</h2>
      <ul>
      <% @registration.errors.full_messages.each do |msg| %>
        <li><%= msg %></li>
      <% end %>
      </ul>
    </div>
  <% end %>

  <% @registration.registration_options.each do |reg_opt| %>
          <%= fields_for :registration_options, reg_opt do |opt|%>
                  <div class="registration_options">
                          <%= opt.label reg_opt.shortname %> - <%= Money.new(reg_opt.price).format %>/per person
                          <%= opt.text_field :attending, size: 2, disabled: reg_opt.required, id: "#{reg_opt.shortname}_attending"  %><br/>
                  <%= reg_opt.description %> <% if reg_opt.free_count > 0 %> The first <%= reg_opt.free_count %> are included at no cost as part of your yearly dues <% end %>
                  </div>
  <% end %>
  <% end %>

  <%= f.hidden_field :event_id %>

<%= f.hidden_field :stripe_card_token %>

<% @registration.update_total %>
Total cost: <%= Money.new(@registration.total).format %>

<div class="field">
  <%= f.label :email %>
  <%= f.text_field :email %>
</div>
<% if @registration.stripe_card_token.present? %>
  Credit card has been provided.
<% else %>
  <div class="field">
    <%= label_tag :card_number, "Credit Card Number" %>
    <%= text_field_tag :card_number, nil, name: nil %>
  </div>
  <div class="field">
    <%= label_tag :card_code, "Security Code on Card (CVV)" %>
    <%= text_field_tag :card_code, nil, name: nil %>
  </div>
  <div class="field">
    <%= label_tag :card_month, "Card Expiration" %>
    <%= select_month nil, {add_month_numbers: true}, {name: nil, id: "card_month"} %>
    <%= select_year nil, {start_year: Date.today.year, end_year: Date.today.year+15}, {name: nil, id: "card_year"} %>
  </div>
<% end %>
<div id="stripe_error">
  <noscript>JavaScript is not enabled and is required for this form. First enable it in your web browser settings.</noscript>
</div>
  <div class="actions">
    <%= f.submit "Register" %>
  </div>
<% end %>