<%= form_for([@group, member]) do |f| %> <% if member.errors.any? %> <div id="error_explanation"> <h2><%= pluralize(member.errors.count, "error") %> prohibited this member from being saved:</h2> <ul> <% member.errors.full_messages.each do |message| %> <li><%= message %></li> <% end %> </ul> </div> <% end %> <div class="actions"> <%= f.collection_select(:person_id, @possible_members, :id, :full_name, prompt: true) %> <%= f.check_box :is_leader %> Beheerder <%= f.submit %> </div> <% end %>