dynamic form with cocoon

_form.html.haml

= semantic_form_for(@event, :html => {:multipart => true, :id => "logoUpload", :'data-ajax' => false}) do |f|
  = f.inputs do
    = f.input(:logo, :as => :file)
    = f.input(:logo_cache, :as => :hidden)
    = f.input(:name)
    = f.input(:info)

  #matches
    = f.inputs :for => [:matches] do |mf|
      = render :partial => 'match_fields', :locals => {:f => mf}
    .links
      = link_to_add_association 'add match', f, :matches

  = f.buttons

_match_fields.html.haml

.nested-fields
  = f.inputs do
    = f.input(:score)
    = f.input(:date, :as => :date)
    = link_to_remove_association "remove match", f