_form.html.erb

<%= form_for(@quote) do |f| %>
  <%= render 'shared/error_messages', object: f.object %>

  <div class='row'>
    <div class='col'>
      <div class='form-group'>
        <%= f.label :speaker, 'Who said it?' %>
        <%= f.collection_select :speaker_id, Artist.order(:name), :id, :name,
        {prompt: 'Select an artist'}, {class: 'form-control select-artist'} %>
      </div>
    </div><!-- /.col -->
  </div><!-- /.row -->

  <div class='row'>
    <div class='col'>
      <div class='form-group'>
        <%= f.label :topic, 'About whom?' %>
        <%= f.collection_select :topic_id, Artist.order(:name), :id, :name,
        {prompt: 'Select an artist'}, {class: 'form-control select-artist'} %>
      </div>
    </div><!-- /.col -->
  </div><!-- /.row -->

  <div class='row'>
    <div class='col'>
      <div class='form-group'>
        <%= f.label :genre, 'Genre' %>
        <%= f.grouped_collection_select :genre_id, Medium.order(:name), :genres,
        :name, :id, :name, {prompt: 'Select a genre'}, {class: 'form-control selectize'} %>
      </div>
    </div><!-- /.col -->
  </div><!-- /.row -->

  <div class='form-group'>
    <%= f.label :source, 'Cite your source' %>
    <%= f.url_field :source, class: 'form-control',
    placeholder: 'http://' %>
    <small class="form-text text-muted">
      Must be a valid url.
    </small>
  </div>

  <div class='form-group'>
    <%= f.label :text, 'Share the quote...' %>
    <%= f.text_area :text, class: 'form-control', rows: 8 %>
    <small class="form-text text-muted">
      We'll add the "double quotes" for you.
    </small>
  </div>

  <% if @quote.new_record? %>
    <%= f.submit 'Add Quote', class: 'btn btn-primary btn-block' %>
  <% else %>
    <%= f.submit 'Update Quote', class: 'btn btn-primary btn-block' %>
  <% end %>
<% end %>