app/views/relationships/_follow.html.haml
= form_with model: current_user.relationships.build,
id: dom_id(user, "follow_form"), local: false do |f|
= render 'notifications/error_messages', object: f.object
= f.hidden_field :followed_id, value: user.id
.actions
= f.submit 'Follow', class: 'btn btn-primary btn-lg'