<%= form_for(concept) do |f| %>
  <% if concept.errors.any? %>
    <div id="error_explanation">
      <h2><%= pluralize(concept.errors.count, "error") %> prohibited this concept from being saved:</h2>

      <ul>
      <% concept.errors.full_messages.each do |message| %>
        <li><%= message %></li>
      <% end %>
      </ul>
    </div>
  <% end %>

  <div class="field">
    <%= f.label :value %>
    <%= f.text_field :value %>
  </div>

  <div class="field">
    <%= f.label :response_sets %>
    <%= select_tag 'linked_response_sets', options_from_collection_for_select(ResponseSet.all, 'id', 'name', @concept.response_sets.map{ |j| j.id }), :multiple => true, include_blank: true %>
  </div>

  <div class="actions">
    <%= f.submit %>
  </div>
<% end %>

<%= form_for(concept) do |f| %>
  <% if concept.errors.any? %>
    <div id="error_explanation">
      <h2><%= pluralize(concept.errors.count, "error") %> prohibited this concept from being saved:</h2>

      <ul>
      <% concept.errors.full_messages.each do |message| %>
        <li><%= message %></li>
      <% end %>
      </ul>
    </div>
  <% end %>

  <div class="field">
    <%= f.label :value %>
    <%= f.text_field :value %>
  </div>

  <div class="field">
    <%= label_tag :linked_response_sets %>
    <%= select_tag 'linked_response_sets', options_from_collection_for_select(ResponseSet.all, 'id', 'name', @concept.response_sets.map{ |j| j.id }), :multiple => true, include_blank: true %>
  </div>

  <div class="actions">
    <%= f.submit %>
  </div>
<% end %>

Change to concepts _form to fix accessibility bug
Change to concepts _form to fix accessibility bug
