app/views/admin/homepage/_feed.html.erb
<div id="<%= dom_id(feed) %>" class="small-12 medium-6 large-4 column end">
<div class="callout">
<h3 id="<%= dom_id(feed.setting, :title) %>"><%= t("admin.homepage.feeds.#{feed.kind}") %></h3>
<%= render "setting", setting: feed.setting %>
<%= form_for [:admin, feed], remote: true do |f| %>
<%= f.select :limit, (1..10), {}, class: "js-submit-on-change" %>
<% end %>
</div>
</div>