app/views/follows/_follow_button.html.erb
<div class="js-follow">
<span class="followable-content">
<% if follow.followable.followed_by?(current_user) %>
<%= link_to t("shared.following"),
follow_path(follow),
method: :delete, remote: true,
title: unfollow_text(follow.followable),
class: "button expanded" %>
<% else %>
<%= link_to follow_text(follow.followable),
follows_path(followable_id: follow.followable.id,
followable_type: follow.followable.class.name),
method: :post, remote: true,
title: follow_text(follow.followable),
class: "button hollow expanded" %>
<% end %>
</span>
</div>