How to display error messages in a multi-model form with transaction?

Question

Two models, Organization and User, have a 1:many relationship. I have a combined signup form where an organization plus a user for that organization get signed up.

The p

Answer 1

organization has_many :users and user belongs_to :organization

organization.rb

accepts_nested_attributes_for :users

new.html.erb

<%= form_for @organization, url: next_url do |f| %>
 <%= render 'shared/error_messages', object: @organization %>
 <%= f.text_field :name %>
    # Other fields
 <%= f.fields_for(:users,@organization.users.build) do |p| %>
   <%= p.email_field :email %>
   # Other fields
 <% end %>
 <%= f.submit "Submit" %>
<% end %>

In controller

def create
  @organization = Organization.new(new_params)
  if @organization.save
    flash[:success] = "Yeah!"
    redirect_to root_url
  else
   render :new
  end
end