SMERM/EMUForm

<h1 class="entry-title">Select an Author</h1>

<div class="entry-content">

Please select one (or more) authors for <span class='work_title'><strong><%= @work.title %></strong></span> from the following list:

<%= form_for(@author, url: select_roles_url) do |f| %>
  <%= f.hidden_field(:work, { value: @work.to_param, name: 'role[work_id]' }) %>
  <div class="field">
    <%= f.label :author %>
    <%= f.collection_select(:id, @all_authors, :to_param, :full_name, {}, { multiple: 'multiple', name: 'role[authors_attributes][][id]' }) %>
  </div>
  <div class="actions">
    <%= f.submit('Confirm selection') %>
  </div>
<% end %>

</div>

Or create more authors as needed:<br />

<%= link_to 'Add new author', new_work_author_path(@work), class:"btn" %>