panel/app/views/posts/attributes/_file.haml

.form-group{ data: { controller: 'file-preview' } }
  = label_tag "#{base}_#{attribute}", post_label_t(attribute, post: post)
  - if metadata.static_file
    - case metadata.static_file.blob.content_type
    - when %r{\Avideo/}
      = video_tag url_for(metadata.static_file),
                  controls: true, class: 'img-fluid',
                  data: { target: 'file-preview.preview' }
    - when %r{\Aaudio/}
      = audio_tag url_for(metadata.static_file),
                  controls: true, class: 'img-fluid',
                  data: { target: 'file-preview.preview' }
    - when 'application/pdf'
      %iframe{ src: url_for(metadata.static_file) }
    - else
      = link_to t('posts.attribute_ro.file.download'),
                url_for(metadata.static_file)
    -# Mantener el valor si no enviamos ninguna imagen
    = hidden_field_tag "#{base}[#{attribute}][path]", metadata.value['path']
    -# Los archivos requeridos solo se pueden reemplazar
    - unless metadata.required
      .custom-control.custom-switch
        = check_box_tag "#{base}[#{attribute}][path]",
                        '',
                        false,
                        id: "#{base}_#{attribute}_destroy",
                        class: 'custom-control-input'
        = label_tag "#{base}_#{attribute}_destroy",
                    t('posts.attributes.file.destroy'),
                    class: 'custom-control-label'

  .custom-file
    = file_field(*field_name_for(base, attribute, :path),
                 **field_options(attribute,
                                 metadata,
                                 required: (metadata.required && !metadata.path?)),
                 class: "custom-file-input #{invalid(post, attribute)}",
                 data: { target: 'file-preview.input',
                         action: 'file-preview#update' })
    = label_tag "#{base}_#{attribute}_path",
                post_label_t(attribute, :path, post: post),
                class: 'custom-file-label'
    = render 'posts/attribute_feedback',
             post: post, attribute: [attribute, :path], metadata: metadata

.form-group
  = label_tag "#{base}_#{attribute}_description",
              post_label_t(attribute, :description, post: post, required: false)
  = text_field(*field_name_for(base, attribute, :description),
               value: metadata.value['description'],
               dir: dir, lang: locale,
               **field_options(attribute, metadata, required: false))
  = render 'posts/attribute_feedback',
           post: post, attribute: [attribute, :description], metadata: metadata