app/views/comments/_edit.html.haml
- class_name = commentable.class.name.underscore
.comment{style: "margin: 5px 0px 0px 0px"}
= link_to avatar_for(current_user, size: :small), user_path(current_user)
= form_for(@comment, remote: true) do |f|
= hidden_field_tag "comment[commentable_id]", commentable.id
= hidden_field_tag "comment[commentable_type]", class_name.classify
= f.text_area :comment, id: dom_id(@comment, :text)
.buttons
= f.submit t(:save_note), class: 'btn btn-primary'
#{t :or}
= link_to(t(:cancel), edit_comment_path(@comment, "#{class_name}_id" => commentable.id, cancel: true), remote: true)