new.html.haml

%h1 New vendor

= render 'form'

= link_to 'Cancel', vendors_path, id: :cancel_new_vendor_link

---------------------
_form.html.haml

= form_for @vendor, :html => { :class => 'form-horizontal' } do |f|
  .form-actions
    = f.submit nil, :class => 'btn btn'
    - if @vendor.new_record?
      = link_to 'Cancel', vendors_path, id: :cancel_new_vendor_link
    - else
      = link_to 'Cancel', @vendor, id: :cancel_new_vendor_link