Guest form using person_field

guest_form_with_person_field.html.erb

<% @people.each_with_index do |person, index| %>
  <div class="row">
  <%= f.fields_for(person) do |ff| %>
    <%= person_field("Name:#{ff.text_field :name, name: "person[][name]"}") %>
    <%= person_field("Email:#{ff.text_field :email, name: "person[][email]"}") %>
    <% mp = person.meal_people.where(meal: @meal).first %>
    <%= person_field do %>
        Relationship:
        <%= select_tag(:host_relationship,
          options_for_select(['friend','relative','neighbor',
            'coworker', 'student','teacher','clergy', 'other'],
            [(mp.host_relationship if mp)]),
          name: "person[][host_relationship]",
          prompt: "Who is s/he to you?") %>
    <% end %>
    <br>
    <%= tag(:hr) unless index == @people.length - 1 %>
  <% end %>
  </div>
<% end %>