rails_galm/app/views/people/_form.html.erb

<% form_for @person do |f| %>
  <%= f.error_messages %>
  <p>
    <%= f.label :firstname %><br />
    <%= f.text_field :firstname %>
  </p>
  <p>
    <%= f.label :lastname %><br />
    <%= f.text_field :lastname %>
  </p>
  <p><%= f.submit "Submit" %></p>
<% end %>