I'am working on a project about a booking system for a hotel, i have the Client model and the Reservation model, the client has_many reservations and the reservation belongs_to :client. The problem si that when i want to create a new reservation, i want to be able to create a client in the same form... Here is the form: <%= form_for(@reserva) do |f| %> <% if @reserva.errors.any? %> <div id="error_explanation"> <h2><%= pluralize(@reserva.errors.count, "error") %> prohibited this reserva from being saved:</h2> <ul> <% @reserva.errors.full_messages.each do |msg| %> <li><%= msg %></li> <% end %> </ul> </div> <% end %> <div class="span12 field-box"> <%= f.label :cliente_id %> <% clientes_array = Cliente.all.map { |cliente| ["#{cliente.nombre} #{cliente.apellido}", cliente.id] } %> <%= f.select(:cliente_id, options_for_select(clientes_array)) %> </div> <div class="span12 field-box"> <label >Cliente Nuevo?</label> <%= check_box_tag 'con_cliente', 'ClienteNuevo', false %> </div> <div id="cliente_form"> <%= f.fields_for :cliente do |cliente_builder| %> <div class="span12 field-box"> <label>Nombre:</label> <%= cliente_builder.text_field(:nombre, class: "span9") %><br /> </div> and here is the controller: class ChecksController < ApplicationController def checkin @reserva = Reserva.new cliente = @reserva.build_cliente end when i try to add a reservation, i complete the client fields_for but when the reservation is created, the client is equal to nil.... Any ideas ?? -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To unsubscribe from this group and stop receiving emails from it, send an email to rubyonrails-talk+unsubscribe-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org To view this discussion on the web visit https://groups.google.com/d/msgid/rubyonrails-talk/0c8a7d18-7d96-4b97-821d-c8e25c86cf9c%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.