app/views/staff/events/_custom_fields_form.html.haml
#edit-custom-fields
= simple_form_for @event, url: event_staff_update_custom_fields_path, method: :put,
remote: true, class: "form-horizontal" do |f|
= f.input :custom_fields_string, label: false, autofocus: true,
placeholder: 'Separate multiple fields with commas',
hint: "This is a comma separated list of custom fields allowed for use on proposals."
.pull-right
%button.btn.btn-default#cancel-custom-fields{type: "cancel"} Cancel
%button.btn.btn-primary{type: "submit"} Save