osem/app/views/proposal/_form.html.haml

.row
  .col-md-12
    .tabbable
      %ul.nav.nav-tabs
        %li.active
          = link_to "Proposal", "#proposal-content", "data-toggle"=>"tab"
        %li
          = link_to "Attachments", "#attachment-content", "data-toggle"=>"tab"
      .tab-content
        #proposal-content.tab-pane.active
          = render 'proposal/proposal_form'
        #attachment-content.tab-pane
          = form_for EventAttachment.new, :url => conference_proposal_event_attachment_index_path(@conference.short_title, @event), :html => { :multipart => true, :id => "fileupload"  } do |f|
            %table.table.table-striped
              %thead
                %th
                %th
                  %b Filename
                %th
                  %b Title
                %th
                  %b Size
                %th
                  %b Public
                %th
                %th
              %tbody.files


            .row-fluid.fileupload-buttonbar
              .btn.btn-success.fileinput-button
                %span.glyphicon.glyphicon-icon-plus.icon-white
                Add files...
                = f.file_field :attachment
                = f.hidden_field :event_id, :value => @event.id

:javascript
  $(document).ready( function() {
      $('#fileupload').fileupload();
      $('#fileupload').bind('fileuploadsubmit', function (e, data) {
          var inputs = data.context.find(':input');
          if (inputs.filter('[required][value=""]').first().focus().length) {
              return false;
          }
          data.formData = inputs.serializeArray();
      });
      $.getJSON($('#fileupload').prop('action'), function (files) {
        var fu = $('#fileupload').data('fileupload'),
          template;
        fu._adjustMaxNumberOfFiles(-files.length);
        template = fu._renderDownload(files)
          .appendTo($('#fileupload .files'));
        fu._reflow = fu._transition && template.length &&
          template[0].offsetWidth;
        template.addClass('in');
        $('#loading').remove();
      });

  } );

:plain
  <script id="template-upload" type="text/x-tmpl">
    {% for (var i=0, file; file=o.files[i]; i++) { %}
    <tr class="template-upload fade">
      <td class="preview"><span class="fade"></span></td>
      <td class="name"><span>{%=file.name%}</span>
        <div class="progress progress-success progress-striped active"><div class="bar" style="width:0%;"></div></div>
      </td>
      <td class="name"><input type="text" name="title[]" value="{%=file.name%}"/></td>
      <td class="size"><span>{%=o.formatFileSize(file.size)%}</span></td>
      <td class="name"><input checked type="checkbox" name="public">Public</input></td>
      {% if (file.error) { %}
      <td class="error"><span class="label label-important">{%=locale.fileupload.error%}</span> {%=locale.fileupload.errors[file.error] || file.error%}</td>
      {% } else if (o.files.valid && !i) { %}
      <td class="start">{% if (!o.options.autoUpload) { %}
        <button class="btn btn-primary">
          <span class="glyphicon glyphicon-upload"></span>
          <span>{%=locale.fileupload.start%}</span>
        </button>
        {% } %}</td>
      {% } else { %}
      <td></td>
      {% } %}
      <td class="cancel">{% if (!i) { %}
        <button class="btn btn-warning">
          <span class="glyphicon glyphicon-circle"></span>
          <span>{%=locale.fileupload.cancel%}</span>
        </button>
        {% } %}</td>
    </tr>
    {% } %}
  </script>

  <script id="template-download" type="text/x-tmpl">
    {% for (var i=0, file; file=o.files[i]; i++) { %}
      <tr class="template-download fade">
        {% if (file.error) { %}
          <td>{%=file.title%}</td>
          <td class="name">{%=file.name%}</td>
          <td class="size">{%=o.formatFileSize(file.size)%}</td>
          <td class="error" colspan="2"><span class="label label-important">{%=locale.fileupload.error%}</span> {%=locale.fileupload.errors[file.error] || file.error%}</td>
          {% } else { %}
          <td class="preview">{% if (file.thumbnail_url) { %}
            <a href="{%=file.url%}" title="{%=file.name%}" rel="gallery" download="{%=file.name%}"><img src="{%=file.thumbnail_url%}"></a>
            {% } %}</td>
          <td class="name">
            <a href="{%=file.url%}" title="{%=file.name%}" rel="{%=file.thumbnail_url&&'gallery'%}" download="{%=file.name%}">{%=file.name%}</a>
          </td>
          <td>{%=file.title%}</td>
          <td class="size">{%=o.formatFileSize(file.size)%}</td>
          <td>{%=file.public%}</td>
          {% } %}
        <td class="delete" colspan="2">
          <button class="btn btn-danger pull-right" data-type="{%=file.delete_type%}" data-url="{%=file.delete_url%}">
            <span class="glyphicon glyphicon-trash"></i>
            <span>{%=locale.fileupload.destroy%}</span>
          </button>
        </td>
      </tr>
      {% } %}
  </script>