app/views/layers/_edit.html.erb
<div class="layers edit list-editor" data-components="editLayers"
data-editlayers-options='<%= {data: layers_manager_data}.to_json %>'>
<%= f.input :layers_attributes, as: :hidden, input_html: { class: 'layers-value', value: f.object.layers_values.to_json } %>
<div class="layers-list" data-components="sortable"></div>
<button class="add-new-btn button" title="<%= t 'layers.title.add' %>">
<%= icon 'plus', t('layers.add') %>
</button>
</div>