app/views/cats/build/add_illnesses.html.erb
<h2>Illnesses</h2>
<div id="sufferings field">
<%= form_for(@cat, :url => wizard_path, :method => :put) do |f| %>
<%= f.fields_for :sufferings do |f| %>
<div class="card" style="width: 18rem;">
<div class="card-body">
<%= f.label :status %><br/>
<%= f.select :status, Suffering.statuses.keys.map { |w| [w.humanize, w] } %> <br/>
<%= f.hidden_field :cat_id, params[:cat_id] %>
<%= f.label "Illness" %><br/>
<%= f.collection_select(:illness_id, Illness.all, :id, :name ) %><br/>
<%= f.check_box :chronic %>
<%= f.label :chronic %>
<%= f.label :diagnosis_date %><br>
<%= f.date_field :diagnosis_date, class: 'form-control' %>
<%= f.label :notes %><br>
<%= f.text_area :notes, class:'form-control' %><br/>
<%= f.check_box :_destroy %>
<%= f.label :_destroy, "Remove" %>
</div>
</div>
<% end %>
<div class="links">
<%= link_to_add_association f, :sufferings, class:'btn btn-primary' do %>Add<% end %>
</div>
<%= f.submit 'Siguiente', :class => 'btn btn-primary' %>
<% end %>
</div>